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      06-23-2008, 03:59 AM   #1
Socale92
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when will aftermarket headers be available?

i really want performance headers. they made a huge difference on my e46 m3, thx

Last edited by Socale92; 06-24-2008 at 04:38 PM.
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      06-24-2008, 07:18 AM   #2
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M3 already has them.

http://www.kenrockwell.com/bmw/m3/2007/engine.htm
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      06-24-2008, 04:45 PM   #3
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Quote:
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i really want performance headers. they made a huge difference on my e46 m3, thx
they will be available on May 12th 2010. my IQ dropped entering into this thread
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thx i already knew that
lol u calling him stupid?
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      06-24-2008, 04:50 PM   #4
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I thought May 32nd 2007? Weird.
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      06-24-2008, 05:21 PM   #5
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oh boy thread failure, i was afraid of that....nm
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      06-24-2008, 05:44 PM   #6
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My question is if the car comes with headers from the factory, how much a performance increase do you think aftermarket headers will give you? It's not be as much of an increase as going from a manifold system to headers like you did in the E46.
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      06-24-2008, 06:02 PM   #7
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Quote:
Originally Posted by skierman64 View Post
My question is if the car comes with headers from the factory, how much a performance increase do you think aftermarket headers will give you? It's not be as much of an increase as going from a manifold system to headers like you did in the E46.
The factory headers for the M3 are essentially equal-length shorties with a catalytic converter welded on just after the collector. The primaries are relatively narrow in diameter, and the tubing is pretty convoluted, so it does sound like there is room for improvement, particularly if it comes either with a high-flow cat or catless.

Note: This is based on my rather unscientific observation from looking at one of these off the vehicle, at the Dinan facility in Morgan Hill, while I was being given a tour of the place.

Steve Dinan said they *might* come out with a header for the car, but that they weren't completely sure they were going to do it.
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      06-24-2008, 06:08 PM   #8
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only thing that *can* help is HFC that's all. i am so tempted to run straight pipes and fuck all cats lol

i wish, i cant live with that drone/noise
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      06-24-2008, 08:29 PM   #9
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Quote:
Originally Posted by Kadarin View Post
The factory headers for the M3 are essentially equal-length shorties with a catalytic converter welded on just after the collector. The primaries are relatively narrow in diameter, and the tubing is pretty convoluted, so it does sound like there is room for improvement, particularly if it comes either with a high-flow cat or catless.

Note: This is based on my rather unscientific observation from looking at one of these off the vehicle, at the Dinan facility in Morgan Hill, while I was being given a tour of the place.

Steve Dinan said they *might* come out with a header for the car, but that they weren't completely sure they were going to do it.
THANK YOU, this is the kind of info im looking for, u rock kadarin
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      06-24-2008, 09:48 PM   #10
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Aftermarket headers

Quote:
Originally Posted by Socale92 View Post
i really want performance headers. they made a huge difference on my e46 m3, thx
As has been stated, the stock headers are very high tech hydroformed units. Swapping them out will not yield significant gains. Taking off the cats is irresponsible and don't most states require inspections.

"Innovative exhaust system
Through its design and configuration, the exhaust system for the new V8 power unit optimises the cylinder charge cycle, ensuring an optimum surge of power and torque at all times. And again, this component has been designed and built from the start for consistent lightweight qualities.

The exhaust manifolds are made in an internal high-pressure remoulding process, the desired contours of the stainless-steel pipes being shaped from inside under pressure of up to 800 bar. The result is extremely thin walls measuring just 0.65-1.00 millimetres (0.0256-0.0394") in thickness, optimising flow conditions with minimum resistance, light weight, and optimum response of the catalytic converters." S65 press release
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      06-24-2008, 11:48 PM   #11
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Why do we see up to 20hp REAR wheels on aftermarket headers for the s85? The s65 is just like an s85, just smaller.
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      06-25-2008, 02:04 AM   #12
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Why do we see up to 20hp REAR wheels on aftermarket headers for the s85? The s65 is just like an s85, just smaller.
You make a great point.

Headers is one of the best power mods for the E60 M5.

Steve Dinan already stated in the stroker kit video, the M3 V8 is basically the S85 with two cylinders cut off.

RDsport has to be working on headers, as well as others.
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      06-25-2008, 02:30 AM   #13
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You make a great point.

Headers is one of the best power mods for the E60 M5.

Steve Dinan already stated in the stroker kit video, the M3 V8 is basically the S85 with two cylinders cut off.

RDsport has to be working on headers, as well as others.
im waiting on supersprint, evosport, and rdsport for sure...
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      06-25-2008, 05:23 PM   #14
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20 hp on the V10 M5 with headers ALONE? Highly doubtful. Show me the apples to apples dyno runs and confirm that the ONLY difference was headers.
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      06-25-2008, 06:11 PM   #15
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Quote:
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I see plenty of posts from you guys around Dinan, but where the HECK are all the M3's around here? I live in Morgan Hill, have owned mine since April 1st, and I STILL HAVEN'T SEEN A SINGLE M3 ON THE ROAD -- ANYWHERE!!!
I don't know! I live in South San Jose and work in Santa Clara, and though I've only owned my car for just under a month I too have yet to see another one on the road.
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      06-25-2008, 06:14 PM   #16
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20 hp on the V10 M5 with headers ALONE? Highly doubtful. Show me the apples to apples dyno runs and confirm that the ONLY difference was headers.
i havent agreed with u in a long time coz u were too busy praising MDCT(), i guess it's time i agree with you like 100%. 20 hp my ass!
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      06-25-2008, 07:45 PM   #17
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Get some evosport header when they come out.
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      06-25-2008, 08:52 PM   #18
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Get some evosport header when they come out.
know when that will be?
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      06-25-2008, 10:50 PM   #19
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So, the M engineers got this all wrong then. They don't know how to design efficient headers, but some aftermarket guys do? Like Swamp is saying, I'll believe it when I see evidence. Sure, you can mess with the cats, but as Greg is pointing out, do you want your car to pollute 100x more for a little bit more power?
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      06-25-2008, 11:14 PM   #20
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Sure, you can mess with the cats, but as Greg is pointing out, do you want your car to pollute 100x more for a little bit more power?
yes.
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      06-25-2008, 11:25 PM   #21
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Id be interested in seeing what comes out!
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      06-25-2008, 11:53 PM   #22
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i havent agreed with u in a long time coz u were too busy praising MDCT(), i guess it's time i agree with you like 100%. 20 hp my ass!
Go talk to the guys on M5board.com.

M5 RDsport headers are a +38hp gain. http://www.racingdynamics.com/Locali..._E60_Motor.htm

RPI claims +28whp and +31wtq with their headers, with dynos to prove.

Supersprint headers on average have seen a +30hp gain.

Not sure what Evosport claims with their M5 headers.

Last edited by BlackJetE90; 06-26-2008 at 12:25 AM.
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