First Mod: Headers or Shark Injector?

[QC_ZHP]

Sweet, can't wait. I wonder how an x-pipe would be in the setup.

[TigerTater]

Absolutely. I'm going to weld them anyways. Ordering this Friday.

Your ordering the AR 25, and plan to insert the stock Zhp pipe into the new resonators? Correct me if im Wrong...just trying to keep it lined out in my head...

[Smolck]

Your ordering the AR 25, and plan to insert the stock Zhp pipe into the new resonators? Correct me if im Wrong...just trying to keep it lined out in my head...

The plan is to replace the second resonator with the ar25s only. I want to see what that does and then I may modify it further.

[TigerTater]

Any updates? Also QC you said you bought 16 new studs/nuts, why not 24? It seems there are 24 holes on the pair of headers. Maybe I'm overthinking it?


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[TigerTater]

After doing some more research...I have learned that the factory manifolds are held with only 16 head bolts, but that some blocks are drilled for the full 24? Any way to determine this, and what's the consensus on adding the full 24 besides more work ?


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[Smolck]

After doing some more research...I have learned that the factory manifolds are held with only 16 head bolts, but that some blocks are drilled for the full 24? Any way to determine this, and what's the consensus on adding the full 24 besides more work ?


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I did a 2001 330ci that had holes for 24 studs. I used all 24. For my car (04 ZHP) there are only 16 holes. If you go to my YouTube page and watch the video I made on how to install the new studs, you will see what I am talking about. Not sure if all ZHPs are like that or not. What I do know is the factory gasket only has 8 holes per side.

[TigerTater]

I did a 2001 330ci that had holes for 24 studs. I used all 24. For my car (04 ZHP) there are only 16 holes. If you go to my YouTube page and watch the video I made on how to install the new studs, you will see what I am talking about. Not sure if all ZHPs are like that or not. What I do know is the factory gasket only has 8 holes per side.

Good deal...Thanks for the info!..did you order the AR25's yet?

[mbeckel]

Nice work Smolck, I've been looking thru your youtube vids and you inspired me to put headers on my zhp and even join the forums. I sent you a tweet as well, I may have some questions for my install here soon. Got any pointers for me before I tackle this job?

[Smolck]

Nice work Smolck, I've been looking thru your youtube vids and you inspired me to put headers on my zhp and even join the forums. I sent you a tweet as well, I may have some questions for my install here soon. Got any pointers for me before I tackle this job?

Couple helpful tips:

1. Buy the new hardware and OE gaskets (remove the heat shield, you don't need it and it gets in the way.
2. While on the subject, just pull the old heat shields off to remove the old manifolds. Big pliers and a rocking motion and they pop right off.
3. Spray the heck out of all the bolts with liquid wrench 30 minutes before you start, don't forget the bolts under the car
4. Remove the passenger side motor mount bracket. It's just soooo much easier. If you have the cash, now is a good time to replace the mounts too.
5. Install the rear header first.
6. A ratcheting 11mm wrench and an air ratchet will make your life MUCH easier.
7. Don't forget to retorque all bolts after 50 miles of driving.

Enjoy the rocket car!

[mbeckel]

Have you put an intake on yours yet?

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[mbeckel]

12916
The headers I intend to use for the car

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[UdubBadger]

Good choice and good price


Goin' HAM mobile

[Pip]

Good choice and good price


Goin' HAM mobile

Wish headers were that cheap for the M. I would've had them months ago.

[UdubBadger]

I got a good deal on my pacesetters from Bimmerworld, look into it.


Goin' HAM mobile

[PirateZHP]

Hmm... this thread just got more of my interest. Here's the deal... I want headers, but I need to make sure that they don't cause any CEL or anything. So, how do I do this? Maybe just add a high flow cat?

[mbeckel]

Or get a eurocharged tune. That's the route I'm going

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[Smolck]

Hmm... this thread just got more of my interest. Here's the deal... I want headers, but I need to make sure that they don't cause any CEL or anything. So, how do I do this? Maybe just add a high flow cat?

Still not sure it is possible. I didn't read the whole thread about the possibility of Eurocharged doing the programming for second 02 sensor deletes. If they can, the car won't have any lights. I do occasionally get a rich code though, I suppose the tune might smooth that out as well.

@mbeckel
Yes, I have a CAI. Yes it makes a difference with the headers.

[mbeckel]

Excellent. After the exhaust system is complete. I've been seeing a lot of good things with the cam upgrades, good idea?

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[PirateZHP]

Smolk... you have solutions to everything. You made the catch can work better than the crap system BMW has put into their vehicles. Don't tell me you don't have a solution for this. I NEED this...

[Smolck]

Smolk... you have solutions to everything. You made the catch can work better than the crap system BMW has put into their vehicles. Don't tell me you don't have a solution for this. I NEED this...
Catch can was easy by comparison. Udubbadger said all you need is the lc1 controller. Not sure. But see, in my state, I have no NEED to worry with it. We have no inspections of any kind so I can just let it ride.


Excellent. After the exhaust system is complete. I've been seeing a lot of good things with the cam upgrades, good idea?

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I think cams are a lot of extra work and cost for not a lot of gain. The ZHP has Shrick cams already. And headers really allows them to do their job well. It is the main reason why the ZHP responds to headers with close to 20whp gains and the regular e46s usually see 10-11.

Aggressive cams can add another 10-12hp but you'll need a custom tune to make it idle and run right. Not worth it

[mbeckel]

Having a 10.70's 01 T/A in the past, I NEED more power! But my plan for this is a road course/street car

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[Smolck]

Having a 10.70's 01 T/A in the past, I NEED more power! But my plan for this is a road course/street car

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Solid axle V8 vs independent rear I6 my friend. Pointless to even try to get an e46 in the 10s. Turns and brakes is where the ZHP shines. You could spend $7500 on FI and still only run low 13s, high 12s. The ZHP is FAST as an all around car. Meaning I can and have outrun big V8s on windy roads. All out straight line stuff and you lose every time.

I understand. I had NOS equipped fox bodies for years. Totally different purpose.

[mbeckel]

Oh I know exactly what you are getting at. My goal isn't straight line. I want a road course monster. But just saying I need more power

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[Smolck]

Oh I know exactly what you are getting at. My goal isn't straight line. I want a road course monster. But just saying I need more power

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You will be highly surprised with headers, eurocharge tune, and intake. Thats a good 30whp and that makes the ZHP almost PERFECT.

[Hornung418]

Worth it to run the M52TU headers or should no buy new ones for my M54? I am full-time aware of the differences. It would take a bit of fab work. But they were $40 and are of solid design from 2009.

Sent from my GS3.

[Smolck]

Worth it to run the M52TU headers or should no buy new ones for my M54? I am full-time aware of the differences. It would take a bit of fab work. But they were $40 and are of solid design from 2009.

Sent from my GS3.

If you can get a muffler shop to help you line up the flanges I don't see why it won't work.

[mbeckel]

1293112932

Took advantage of this nice weather we've had and did some work tonight

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[UdubBadger]

Still not sure it is possible. I didn't read the whole thread about the possibility of Eurocharged doing the programming for second 02 sensor deletes. If they can, the car won't have any lights. I do occasionally get a rich code though, I suppose the tune might smooth that out as well.

@mbeckel
Yes, I have a CAI. Yes it makes a difference with the headers.

Lc1 or our tune with coding


Goin' HAM mobile

[BRGcoopahS]

How do you guys deal with inspections with aftermarket headers? You can't pass without the cat.

[UdubBadger]

Yes you can. Each state is different but in most the tests are on readiness, not actual smog readings. As long as the ECU says all systems are working correctly, you pass.

Some have visual, but that's rare too.


Goin' HAM mobile

[Smolck]

How do you guys deal with inspections with aftermarket headers? You can't pass without the cat.

What inspections? We don't have any here in my state.

[TigerTater]

What inspections? We don't have any here in my state.

+1 Louisiana FTW


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[mbeckel]

What inspections? We don't have any here in my state.

I need to look into how strictly Texas does theirs. I may need to pay someone extra to pass it otherwise

Sent from in the bushes

[BRGcoopahS]

Yes you can. Each state is different but in most the tests are on readiness, not actual smog readings. As long as the ECU says all systems are working correctly, you pass.

Some have visual, but that's rare too.


Goin' HAM mobile

That's good news. Anyone in nj here with headers that have passed emissions? I know you can relocate the cat but..... MOAR POWAR

[Smolck]

That's good news. Anyone in nj here with headers that have passed emissions? I know you can relocate the cat but..... MOAR POWAR

If I lived in an area that was as strict and socialist as New Jersey, I'd pay someone to make a 200 CEL race cat "bolt on". And then when inspection day passed, I'd bolt in straight pipes and remove them again.

[mbeckel]

If I lived in an area that was as strict and socialist as New Jersey, I'd pay someone to make a 200 CEL race cat "bolt on". And then when inspection day passed, I'd bolt in straight pipes and remove them again.

Amen to that brother

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[TigerTater]

Options for Quad tips...I know some where looking into it...http://forum.e46fanatics.com/showthread.php?t=759495
Another post same guy...: http://www.bimmerfest.com/forums/showthread.php?t=453910

Smolck did you get youer AR's in yet...?

[Smolck]

Options for Quad tips...I know some where looking into it...http://forum.e46fanatics.com/showthread.php?t=759495
Another post same guy...: http://www.bimmerfest.com/forums/showthread.php?t=453910

Smolck did you get youer AR's in yet...?

Those threads are the only reasonable priced option for quads. While center exit, M3 style quads would look better, it is massively expensive ($1500ish).

I do not have the ARs yet. Some maintenance items cropped up and stole my funds set aside for them. Dang tie rods!

[TigerTater]

Those threads are the only reasonable priced option for quads. While center exit, M3 style quads would look better, it is massively expensive ($1500ish).

I do not have the ARs yet. Some maintenance items cropped up and stole my funds set aside for them. Dang tie rods!

I feel like that is always the case....Im planning on installing some headers along with doing a cooling overhaul in a few weeks...gotta have balance!

[UdubBadger]

What's the benefit you see of going with quads?


Goin' HAM mobile

[Hornung418]

Those threads are the only reasonable priced option for quads. While center exit, M3 style quads would look better, it is massively expensive ($1500ish).

I do not have the ARs yet. Some maintenance items cropped up and stole my funds set aside for them. Dang tie rods!
No, I've confirmed that that is not a requirement. They are sold at the advertised price from inside performance.

[Smolck]

What's the benefit you see of going with quads?


Goin' HAM mobile

I don't think this was directed at me, but the only benefit is looks.

[stephenkirsh]

It looks balanced and bad ass. That's the benefit :)

[UdubBadger]

Badass is subjective. It adds weight and doesn't do much to change sound or anything so my preference is just keep the single side, dual tips and pick a nice exhaust that sounds good


Goin' HAM mobile

[Smolck]

Badass is subjective. It adds weight and doesn't do much to change sound or anything so my preference is just keep the single side, dual tips and pick a nice exhaust that sounds good


Goin' HAM mobile

If you go the route TrippinBimmer went then it wouldn't add weight, but his car was LOUD with headers and no muffler. Sounded pretty awful to me.

After seeing a lot of clips of the E46 M3's with AR25's, I am pumped to get mine.

[Sockethead]

That's good news. Anyone in nj here with headers that have passed emissions? I know you can relocate the cat but..... MOAR POWAR

I haven't seen the state run inspection facility look under the car or hook up to the exhaust in years... It's strictly OBDII test now. As long as the CEL is off and all systems are in a ready state, you should be good to go...

[TigerTater]

Smolck say it isn't so...? I saw on e46fan...


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[TigerTater]

So after installing my headers...my exhaust has a little more rasp than I would like. I was looking at doing the AR 25's but have also considered glass packs as resonators. I know...glasspacks are redneck as it gets...how could one put them on a BMW. The simple fact is that they are good at doing just that, resonating...I found one example on youtube...albeit a 325...https://www.youtube.com/watch?v=1eSh1QJsSAs thoughts? opinions?...any one done this?

[UdubBadger]

Ar25 is going on my m3 next week. I'd go that route


Goin' HAM mobile

[TigerTater]

Ar25 is going on my m3 next week. I'd go that route


Goin' HAM mobile

Where are you sourcing them from? Single AR 25 or Dual?

[UdubBadger]

I went single as M3 has one stock one in section 1.

Got mine on eBay. Off brand JR25 I think. I'm sure it's same stuff. $40


Goin' HAM mobile

[TigerTater]

So after getting back my ECU from Eurocharged for tune update as well as cat delete code I ended up with some codes. In the process of installing headers I did the SAP delete, no point in having it as I have not cats, but I ended up with a code P2430 (secondary air pump fault), duh. I would hate to have to re-install something that is of no use to my engine now, but if the code reappears I might have to, as all work around include coding which I asked Eurocharged about and they said they did not do for the SAP. Next one was a P0041 (O2 Sensor Signals Swapped Bank 1, Sensor 2/Bank 2, Sensor 2), I explicitly labeled the O2 sensors when I was removing re-installing, and Im almost 100% sure I have them in the correct spots. I have read elsewhere that these codes would pop up on peoples care who have never even touched their exhaust systems. Lastly I ended up with a P0171 and P0174 (Fuel system too lean, bank 1 and 2), I have read that this means unmetered air or restricted fuel. I just recently replaced my fuel filter so I can't think its this, I also re-examined my air-box, and all connections making sure that it is all snug without leaks prior to the MAF. I had the codes cleared, and they have not come back as of yet....Im wondering how the Eurocharged tune works with the rear O2 sensors and If I would have needed to clear the codes anyways after the re-tune. Any input is appreciated!

[UdubBadger]

I think I remember getting those swap codes as well as the lean codes too. Try driving a few days worth (50 miles) and see if they stay.


Goin' HAM mobile

[TigerTater]

Resurrection. Do y'all think I should put the 2 AR 25s in the first resonator position or the second, closer to the muffler?


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[mbeckel]

Resurrection. Do y'all think I should put the 2 AR 25s in the first resonator position or the second, closer to the muffler?


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I'd do the first position

Sent from in the bushes

[UdubBadger]

first for sure

[TigerTater]

I'd do the first position

Sent from in the bushes


first for sure

Why closer to the headers vs the closer to the muffler? Just curious? Seth have you finished your setup? Do y'all think it will still be loud enough?...I've grown used to the growl.


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[mbeckel]

Why closer to the headers vs the closer to the muffler? Just curious? Seth have you finished your setup? Do y'all think it will still be loud enough?...I've grown used to the growl.


Sent from my iPhone 13

Should be just fine. Shouldn't make it much quieter. The reason for the first position is for the same reason the headers add so much power compared to a solid catback. Most of the power robbing back pressure happens in the early parts of your exhaust system. By freeing up the flow early allows the car to run more efficient

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[UdubBadger]

Why closer to the headers vs the closer to the muffler? Just curious? Seth have you finished your setup? Do y'all think it will still be loud enough?...I've grown used to the growl.


Sent from my iPhone 13

because of the power gains and you also want to kill the rasp as soon as you can and let the frequency of the sounds after it carry for some distance to get it sounding exotic. i did an ar25 in the stock spot in section 1 on my car.

[UdubBadger]

and yea it'll be loud. the ar25 doesnt kill volume necessarily, but it kills some rasp.

[TigerTater]

because of the power gains and you also want to kill the rasp as soon as you can and let the frequency of the sounds after it carry for some distance to get it sounding exotic. i did an ar25 in the stock spot in section 1 on my car.


Should be just fine. Shouldn't make it much quieter. The reason for the first position is for the same reason the headers add so much power compared to a solid catback. Most of the power robbing back pressure happens in the early parts of your exhaust system. By freeing up the flow early allows the car to run more efficient

Sent from in the bushes


and yea it'll be loud. the ar25 doesnt kill volume necessarily, but it kills some rasp.

Thanks for the input guys!...im pretty excited about it...

[TigerTater]

So AR 25s are definitely to big. I'm at the muffler shop getting them put on and our exhaust pipe is like 1-7/8" so the AR 20s would have been perfect. Now I get to pay a stupid tax for extra piping to reduce them down!


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[UdubBadger]

My bad dude, I was working off an M. Ar20 is the 2" version


Goin' HAM mobile

[QC_ZHP]

Thanks for being the guinea pig Tiger! HAha, sorry to hear but I can't wait to hear the sound. You went with 2?

[TigerTater]

Yea two installed...I'm not sure what's going on...still pretty raspy. http://img.tapatalk.com/d/14/05/21/hutu6ate.jpg

Any ideas?


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[mbeckel]

Yea two installed...I'm not sure what's going on...still pretty raspy. http://img.tapatalk.com/d/14/05/21/hutu6ate.jpg

Any ideas?


Sent from my iPhone 13

Not surprised. Should still be raspy. How's the sound? Do you like it?

Sent from in the bushes

[TigerTater]

Not surprised. Should still be raspy. How's the sound? Do you like it?

Sent from in the bushes

Lol. That wasn't the point! I was trying to reduce the rasp. Get it sounding more clean...


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[mbeckel]

Lol. That wasn't the point! I was trying to reduce the rasp. Get it sounding more clean...


Sent from my iPhone 13

Maybe change the catback?

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[QC_ZHP]

Is the difference that negligible? I wonder what an X-pipe would do

[mbeckel]

Is the difference that negligible? I wonder what an X-pipe would do

That's the reason I am going to buy a magnaflow catback.

Sent from in the bushes

[TigerTater]

I mean it's deeper at low rpms, but still raspy at revs...I wonder if I should have put them in the second position...? Ughh. Feel like I just threw $180 down the drain.


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[QC_ZHP]

Damn, bro. That sucks. I'm pretty sure most M3 guys were putting them in Section 1 so I don't think that's the problem. Maybe you should've just added 1 and kept the stock resonators?

[TigerTater]

Damn, bro. That sucks. I'm pretty sure most M3 guys were putting them in Section 1 so I don't think that's the problem. Maybe you should've just added 1 and kept the stock resonators?

Yea maybe so? :shrug: there's not a whole lot of room tbh.


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[mbeckel]

I mean it's deeper at low rpms, but still raspy at revs...I wonder if I should have put them in the second position...? Ughh. Feel like I just threw $180 down the drain.


Sent from my iPhone 13

Could be worse.

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[TigerTater]

Could be worse.

Sent from in the bushes

Yea your right. Just wish I would have gotten what I intended. I'm not sure what it would take to do that...


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[mbeckel]

Yea your right. Just wish I would have gotten what I intended. I'm not sure what it would take to do that...


Sent from my iPhone 13

Could always replace the rear as well

Sent from in the bushes

[TigerTater]

Could always replace the rear as well

Sent from in the bushes

Yea maybe so down the line. I wonder if just a magnaflow muffler would help...bc the catback only has one resonator in it's system


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[mbeckel]

Yea maybe so down the line. I wonder if just a magnaflow muffler would help...bc the catback only has one resonator in it's system


Sent from my iPhone 13

Prolly going to be louder, not sure about the rasp though

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[UdubBadger]

Wait you put them in where your stock resonators where?


Goin' HAM mobile

[TigerTater]

Wait you put them in where your stock resonators where?


Goin' HAM mobile

Yea that's what we talked about. I asked in what place to put them, y'all said pos 1. Unless it was meant in addition to the stock ones and not in place of, and I didn't catch that. If so that would equal a huge communication breakdown, and me wasting my money....sigh. :(


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[UdubBadger]

No worries mate you'll get her fixed up proper. Get the rest of it worked out and then you can always add another on in section 2 if need be


Goin' HAM mobile

[TigerTater]

Thinking of reinstalling the stock resonator in original place with the two AR25s following that. Or maybe an x pipe instead of stock res? Not sure what the better option is. Stock res is free...


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[QC_ZHP]

Is there enough room to put the AR in front of the resonator?

[TigerTater]

http://img.tapatalk.com/d/14/06/02/a3unu4e8.jpg

http://img.tapatalk.com/d/14/06/02/ytygegug.jpg

I'm not sure because of the shape of the original one it's kind of dog legged. It would all fit better with AR's after first stock res.


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