Maddog, I don’t believe so… I’m sure Jfonz would do it… LOL I had a long set of emails back and forth with Joel from APR about that and the effectiveness of HFC’s/TP’s/Headers… I also sold my stock cats to AWE very cheap so they could do flow testing and make their own HFC’s/headers… Don’t see them selling any and that was about 2+ years ago… I’ll leave it at that…
LOL! Headers man headers, it’s all about the headers… You’re probably right though he and EC have probably gone but won’t share…
Oh and sorry for bringing back an old thread but I figured it was more appropriate than starting a new one… I’m sure it will help someone on the site who actually does want to drag race and lives in the LA area…
[quote=“Auditude3.0T”]
Pete, props to you for all you’ve done for the platform but you’re wasting money… It’s your money though so will see… I guess everyone forgets about the “testing” Imola and I did… No worries though, Jeff and I will repeat similar testing on the 2nd or 9th, will see how that turns out? + karma for you doing this though…
[quote=“primetime”]
I got them used so I got a nice deal on them from a fellow member so figured it was worth a shot, well see what happens… I think if I can convince GIAC to improve tuning for headers by me logging different parameters we can see some gains but we’ll see… I emailed them and mentioned it to see if they’ll do it for me…
Yeah, that’s a good point. He was pretty much equal with headers and weight reduction was the crux of it, right?
Also, don’t forget the testing Jones did. He has made a load of passes and is still in the heart of where people with stock cats and test pipes are.
Bottom line? Stock cats are pretty good on the b8. Tough to improve on them much. Not like the NA B6/7 cars where they were a nightmare.
Did anyone adjust the tuning for headers when they were installed? Just curious, or was that back in the early B8 tuning days where no one really had it fully going on yet.
I know JHM said on the B6/7 & S5 without major adjustments to the tune, the headers didn’t show a real-world acceleration result. They also said the B6/7 could barely idle since the new headers flowed so well compared to the stock manifolds lol.
[quote=“Auditude3.0T”]
Who’s did you buy? Well_armed? I would reach out to Todd at AWE and talk to him about the stock cats and ability to improve on them or lack thereof… Honestly, I hope I’m wrong!
[quote=“primetime”]
I honestly don’t think we will see big improvements but i hope I’m wrong also… Good thing is maybe we can get a C16 tune since I’ll be Catless.
Maddog, I don’t believe so… I’m sure Jfonz would do it… LOL I had a long set of emails back and forth with Joel from APR about that and the effectiveness of HFC’s/TP’s/Headers… I also sold my stock cats to AWE very cheap so they could do flow testing and make their own HFC’s/headers… Don’t see them selling any and that was about 2+ years ago… I’ll leave it at that…
I absolutely love the sound over catted S4’s. Pure animal, I could care less at this point about power gain, if anything it probably adds to low end torque, which you will never notice on track.
I just love driving my car, period. The minimal burbles produced by the 3.0 are much more pronounced with the headers, downshifts, farts, engine noises, etc…
Jeff, Fair point but that is some expensive sound there… I’ll go out on a limb and say you didn’t buy them for sound originally, correct? Have you heard a HFC car? I’ve heard a header car with Miltek exhaust and honestly didn’t think it sounded any better than HFC/Miltek car… It sure did drone more though… At the end of the day everyone gets to make their own choices and I’m all good with that… Heck if Pete proves something different in regards to the headers I’ll be first in line I just don’t see it happening and hate to see him spend/waste the money… Also, I still think the fact that others aren’t producing them speaks volumes for what they do or don’t do to this platform…
Yup you are correct, originally bought them for some “extra” breathing. When I purchased them I was not tuned at the time, butt dyno says extra torque down low, but nothing to prove it.
I ran 13.06 at 106 without headers in negative DA
I ran 12.9 @ 105.6 with headers being only thing changed, maybe intake(can’t remember, no tune) in around 2200-2400 DA. Nothing concrete but none the less something.
I agree with you guys though, not worth the coin for the “performance” gained. As well as the fact no one is producing them. I love the sound though with the AWE, the headers make the AWE sound like an exotic. Never heard a Miltek however, and an HFC car either.
You will hear soon enough 
I absolutely love the sound over catted S4’s. Pure animal, I could care less at this point about power gain, if anything it probably adds to low end torque, which you will never notice on track.
I just love driving my car, period. The minimal burbles produced by the 3.0 are much more pronounced with the headers, downshifts, farts, engine noises, etc…
This could also mean others just don’t have the ability or appetite to make them. JHM makes a stonking set of headers on the B6/7 S4 that add a good 30-40 WTQ and 20-25 WHP to an already tuned/decatted full exhaust car which in itself is already 30 whp/40 wtq over stock. Nobody else makes them, but they sure as hell work.
Jeff, Fair point but that is some expensive sound there… I’ll go out on a limb and say you didn’t buy them for sound originally, correct? Have you heard a HFC car? I’ve heard a header car with Miltek exhaust and honestly didn’t think it sounded any better than HFC/Miltek car… It sure did drone more though… At the end of the day everyone gets to make their own choices and I’m all good with that… Heck if Pete proves something different in regards to the headers I’ll be first in line I just don’t see it happening and hate to see him spend/waste the money… Also, I still think the fact that others aren’t producing them speaks volumes for what they do or don’t do to this platform…
Yup you are correct, originally bought them for some “extra” breathing. When I purchased them I was not tuned at the time, butt dyno says extra torque down low, but nothing to prove it.
I ran 13.06 at 106 without headers in negative DA
I ran 12.9 @ 105.6 with headers being only thing changed, maybe intake(can’t remember, no tune) in around 2200-2400 DA. Nothing concrete but none the less something.
I agree with you guys though, not worth the coin for the “performance” gained. As well as the fact no one is producing them. I love the sound though with the AWE, the headers make the AWE sound like an exotic. Never heard a Miltek however, and an HFC car either.
You will hear soon enough
In my opinion, headers have an inverted bell curve in terms of efficiency or gains. In other words, they lose efficiency once at stage 2 compared to stock or stage 1, but will probably come back around to healthy gains when the new blower is released (as more air is being shoved down its neck).
Saki, I agree and that is a good analogy however, the fact that AWE looked into it and decided against it says something… Also, whatever happened to the set APR had? Don’t recall seeing results of their testing… lol
Doug, Could be the case especially with the additional flow… right now(stage II) the car is definetly restricted on the intake side not exhaust…
This could also mean others just don’t have the ability or appetite to make them. JHM makes a stonking set of headers on the B6/7 S4 that add a good 30-40 WTQ and 20-25 WHP to an already tuned/decatted full exhaust car which in itself is already 30 whp/40 wtq over stock. Nobody else makes them, but they sure as hell work.
very possible. Was just saying. The whole world knows headers work wonders on an NA V8 like the B6/7 S4 with it’s shitty restrictive stock manifolds. Doesn’t mean anyone else will get off their arse to make them though.
Further, even if someone does make a set, it doesn’t mean they know what you’re doing and that they made them well enough to help the car. Many of the headers we’ve seen for the various Audi platforms were designed without respecting any of the performance fundamentals of managing exhaust gases.