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Actually you’ll get less growl, I’ve heard these at my shop.
That's what I meant by "tame idle". . Midrange up...especially under boost its significantly more aggressive when coupled with the Kline exhaust. I'm sure the headers alone don't add the growl but the Inconels do change the sound a bit vs. stock.
I’ve heard Several other cars where we did headers after a different exhaust including a P. Generally what happens when you smooth gases out of the head and into the turbine is you get a smoother flow with equal pulse is at low RPM which is perceived to be quieter. And then as mentioned when the RPMs get higher it enhances the characteristics of that particular exhaust and opens up the flow/sound.
That's what I meant by "tame idle". . Midrange up...especially under boost its significantly more aggressive when coupled with the Kline exhaust. I'm sure the headers alone don't add the growl but the Inconels do change the sound a bit vs. stock.
Would you say that the sound with the Kline headers is (A) rumbly - like an American V8 or (B) howly - like say a GT3 or a flat-plane crank Ferrari?
Howl is a great word for it. more GT3-like I would say. Balancing out and smoothing out the exhaust flow between the head and the turbine is going to give you smoother pulses which in turn creates smoother and even slightly quieter sound at the low ranges. It’s actually quite interesting because you have a much thinner single wall design which you would think makes it louder everywhere but that’s how much of an effect you get from smoothing out flow. In the upper ranges it opens up more can you actually pick up a little more sound and pitch on any exhaust. As many have mentioned on the Kline for example you get that signature GT3 type pitch. And another exhaust systems it generally gives you the same effects in the low and upper ranges.
Stef how are you? Thanks for commenting. Stef are you saying if I add the better flow Kline headers I will get reduced exhaust sound from my EP?
Hello Sal Yes you’ll lose the classic 6 cylinder boxer rumble but that’s with all equal lenght headers.
Same phenomenon happens with the Subaru boxer engines. Adding equal lenght headers makes them sound like a regular 4 cylinder inline engine.
But it’s all a personal preference. If you like a smoother less growling sound then equal lenght headers are great.
If you want more growl while retaining the classic flat 6 Turbo sound then the Europipe Stage 2 is perfect. Its louder, more aggressive, better flowing, howls above 4000 rpm and it doesn’t drone.
Is it the equal length of the tubes that smooths the exhaust flow? Or does it have more to do with the design of the merge collector?
Both. A rotary vs flat collector influences the adjacent primaries differently. A rotary collector influences adjacent primaries equally, a flat collector does not. A similar statement can be made with primary length; equal length will give consistent flow performance from each primary. The Brombacher header you've shown here is not equal length.
Both. A rotary vs flat collector influences the adjacent primaries differently. A rotary collector influences adjacent primaries equally, a flat collector does not. A similar statement can be made with primary length; equal length will give consistent flow performance from each primary. The Brombacher header you've shown here is not equal length.
Is there any design out that that can actually gives extra HP in your opinion? Btw what happened to your upcoming inlets?
Is there any design out that that can actually gives extra HP in your opinion? Btw what happened to your upcoming inlets?
The 'Turbo' trim level has much better OEM manifolds vs the Carrera, where our header experience lies. IMO, the turbo cars have less to gain from from a design optimization standpoint unless you going for extreme performance levels, ie; custom turbo kit. There are however gains to be had (or lost) in weight, but there is little $/hp value there.
The inlets are on the schedule for March. We've had an unusually busy fall/winter, when we usually go heavy on our R&D and product development. Projects got pushed back some to keep up with product demand.
The 'Turbo' trim level has much better OEM manifolds vs the Carrera, where our header experience lies. IMO, the turbo cars have less to gain from from a design optimization standpoint unless you going for extreme performance levels, ie; custom turbo kit. There are however gains to be had (or lost) in weight, but there is little $/hp value there.....
This is what I've heard from Champion Motorsports, and it's why I'm sticking with the OEM headers unless/until I also upgrade to a full frame turbo upgrade (e.g. Sam's XR kit)
I am really happy everytime I ask a question on this site. I hear the things I already know confirmed and I get info that I did not know that always helps with properly modding our cars. Thanks again to all.
Yes you’ll lose the classic 6 cylinder boxer rumble but that’s with all equal lenght headers. 
Its louder, more aggressive, better flowing, howls above 4000 rpm and it doesn’t drone.
