American Racing Headers

[squartus]

Dynos for other M3 aftermarket headers showed only very small gains for a stock engine, but pretty decent gains for a Boosted engine.
Would assume these will be the same, unless they managed to do something the others missed?
Guess the ole dyno will tell though.

[Hujan]

Originally Posted by Nick ARH

Hujan, it's pretty clear that the cats seriously affect what the steps are trying to accomplish, which is expansion and anti reversion. Without cats there's a clear gain right off the hit of the throttle.
Our cats are 200 cell metallic and are extremely durable. In short bursts they can handle up to 2800* temperature. They're also 49 State legal and made in the USA. The manufacturer is proprietary information but we've used them exclusively for almost 5 years with a very low failure rate considering some of the obnoxious applications you'll find them on. We've had no reason to look elsewhere. Thanks.

Nick.

Thanks, Nick. I appreciate the response. In that case, it would be interesting to see dynos of the (1) stepped headers with your catless pipes versus (2) your regular headers with catted pipes versus (3) OEM headers with a catless x-pipe. It would be cool to see the influence on torque and power at different rev ranges.

I would also be interested in seeing weights compared to the OEM components your system replaces.

Lastly, I assume your system can work with other mufflers?

Sorry for all the questions. At least I'm bumping your thread, right?

[WhatsADSM]

FWIW, I'm skeptical that headers will make much of a difference without larger scale modifications (camshafts, engine size increase etc.). Just from looking at the stock pieces you can tell that they are not cheap to produce and there isn't any reason to think BMW cheaped out or wasn't trying to extract power when designing them. There is a TON of reason to believe that the extremely high cell count and narrow primary cats are the major restriction in stock form. So really I think we already found the bang for the buck in terms of exhaust side restriction.

With that said ARH is correct in saying that the OEM is under restriction of other factors when they produce headers, namely emmisions. So I'm sure there is some power to be had... Especially in cars that flow significantly more than stock (supercharged, stroked, etc.) In any case having more parts available for the S65 is always a good thing so I will definitely follow the progression of this thread!

P.S. Of course the head on the S65 is impressive?! It makes essentially the same power as a Coyote engine but with 20% less displacement. Hell even a Honda K20 head from 12 years ago is as impressive as a Coyote.

[Nick ARH]

Originally Posted by squartus

Dynos for other M3 aftermarket headers showed only very small gains for a stock engine, but pretty decent gains for a Boosted engine.
Would assume these will be the same, unless they managed to do something the others missed?
Guess the ole dyno will tell though.

The old saying applies, you can run but you can't hide. It won't be long before quite a few of these systems are bolted up and tested.

[Nick ARH]

Originally Posted by WhatsADSM

FWIW, I'm skeptical that headers will make much of a difference without larger scale modifications (camshafts, engine size increase etc.). Just from looking at the stock pieces you can tell that they are not cheap to produce and there isn't any reason to think BMW cheaped out or wasn't trying to extract power when designing them. There is a TON of reason to believe that the extremely high cell count and narrow primary cats are the major restriction in stock form. So really I think we already found the bang for the buck in terms of exhaust side restriction.

With that said ARH is correct in saying that the OEM is under restriction of other factors when they produce headers, namely emmisions. So I'm sure there is some power to be had... Especially in cars that flow significantly more than stock (supercharged, stroked, etc.) In any case having more parts available for the S65 is always a good thing so I will definitely follow the progression of this thread!

P.S. Of course the head on the S65 is impressive?! It makes essentially the same power as a Coyote engine but with 20% less displacement. Hell even a Honda K20 head from 12 years ago is as impressive as a Coyote.

Your last paragraph pretty much sums up my point. Tons of cylinder head bolted to an engine that thrives at high RPM, breathing thru a shorty style set of headers where emissions must be taken into consideration equals major compromises. We, as header manufacturers, don't have that handicap. We take what the chassis give us and we build the best headers we can and one we know clearly works.

Nick

[saxonb]

Hi Nick.

Any ideas if your headers and will fit RHD?

[Nick ARH]

Originally Posted by saxonb

Hi Nick.

Any ideas if your headers and will fit RHD?

Saxon, believe it or not we got our first order this weekend from a forum member with RHD. When designing these headers we built the left side first and then made the right side a mirror image. It's very possible they will work if the steering shaft is routedin a mirror image to LHD cars.

Obviously I'm anxious to know for sure as I'm sure many of these cars are RHD. We will know soon. I'm pretty confident they will work. Thanks.

Nick

[6ab6ab]

Hello Nick welcome to the forums,

I just have a quick question, My car is NA and i already have a full exhaust setup, i was wondering if for example i bought your headers only would it fit with the rest of my exhaust or do i have to buy the xpipe to? because probably a lot people on this forum already have full exhausts and are not willing to throw away the xpipes that they already paid for.

[AlpineE92M3]

Originally Posted by 6ab6ab

Hello Nick welcome to the forums,

I just have a quick question, My car is NA and i already have a full exhaust setup, i was wondering if for example i bought your headers only would it fit with the rest of my exhaust or do i have to buy the xpipe to? because probably a lot people on this forum already have full exhausts and are not willing to throw away the xpipes that they already paid for.

I would like to know as well. I have test pipes and BPM stage 2 tune. If I buy the headers, do I have to remove my stock xpipe with the test pipes? And could i still use my remus rear section with the new xpipe? I'm assuming I would cause the long tubest would take place of the test pipes. Still need more clarification.

[s85e90]

Have you guys not looked at the pics? They're long tubes which will require the short x pipe.

[MFL]

JFC. This is a 3" Exhaust system. Your whole setup is 2.5". Math, do it.

[Dave07997S]

Originally Posted by MFL

JFC. This is a 3" Exhaust system. Your whole setup is 2.5". Math, do it.

ding ding winner winner chicken dinner😄

[Nick ARH]

Guys yes they are long tubes and although we feel there's something you may be giving up by using other brands, we can supply headers with a short pair of connection pipes that you could splice your system into.
The reason we'd prefer you to use our X is because of where it's located and the fact that it's 3". Of course if your X is located in the same spot and it's 3" why not reuse it. I don't have a problem with offering the headers with a pair of short 3" connection pipes if reusing your aftermarket exhaust is desired. Let me know how we can help you. Thanks.

Nick

Forgot to mention that our long system is also available up to your muffler system at the ball/socket connections in front of the rear axle. It's a direct fit.

[madru17]

so you could make me this header to bolt up to my challenge xpipe

[madru17]

btw i have your ARH long tubes on my e55 and its amazing

[saxonb]

Originally Posted by Nick ARH

Saxon, believe it or not we got our first order this weekend from a forum member with RHD. When designing these headers we built the left side first and then made the right side a mirror image. It's very possible they will work if the steering shaft is routedin a mirror image to LHD cars.

Obviously I'm anxious to know for sure as I'm sure many of these cars are RHD. We will know soon. I'm pretty confident they will work. Thanks.

Nick

Thanks Nick.

Can I keep my Eisenmann axle back, or will there be a drawback to this?

Also your website seems to be charging only $200 for the cats. Is this right?

Pretty pics here for people as well:

[Nick ARH]

Originally Posted by madru17

so you could make me this header to bolt up to my challenge xpipe

Madru, I can't make them fit directly to any brand of aftermarket exhaust unless the connection is made in front of the rear axle ball/socket connections. Anything forward of that is more than likely designed to connect to the factory manifold. Our headers end far further back than that. To connect our headers to any aftermarket X-pipe, other than our own, some fab work will be required.
Since we plan to offer our "headers only" package with a short pair of 3" connection pipes, making the connection to your existing X will be far easier. We're in the process of generating part numbers for header only packages as we speak. Thanks again for all inquiries.

Nick

[Nick ARH]

Saxon, I appreciate you putting up the photo's of the various options we offer. Yes, you can connect to your existing Eisenmann axle back to our system. If the connection is made at the ball/socket connections in front of the rear axle it'll be a direct fit. Thanks.

Nick

[CIFUM3]

Hmmm "headers only" package might seem like an attainable goal for me!

[Beemdog]

So, if I recall, a header change on this car requires a complete removal of the engine?

[Gossypiboma]

Originally Posted by Beemdog

So, if I recall, a header change on this car requires a complete removal of the engine?

Supposedly you can just drop the front subframe for the install.

[Jesus E90 M3]

Originally Posted by CIFUM3

Hmmm "headers only" package might seem like an attainable goal for me!

Me too cant wait...