Header gains???
Supporting Vendor
Joined: Feb 2009
Posts: 4,417
Likes: 1,424
From: Mesa Az
Here are some independent results lashway motorsports did on our headers we make right here in Az. And Higg's the before and after numbers from the other local place doesn't surprise me being a little "off", they are known for interesting dyno tactic's locally 
https://www.corvetteforum.com/forums...7-headers.html
https://www.corvetteforum.com/forums...7-headers.html
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Cordes Performance Racing aka "CPR"
Owner of AZ's premier LSX/LTX motorsports shop
http://cordesperformanceracing.com/
www.facebook.com/cordesperformanceracing.com
joe@cordesperformanceracing.com
480-359-5914
Cordes Performance Racing aka "CPR"
Owner of AZ's premier LSX/LTX motorsports shop
http://cordesperformanceracing.com/
www.facebook.com/cordesperformanceracing.com
joe@cordesperformanceracing.com
480-359-5914
Team Owner
Joined: Jan 2007
Posts: 29,063
Likes: 1,839
From: cookeville tennessee
I already know everything you are saying. I was simply asking for gains based on facts.
I have headers and tunes in all my vehicles other than my 15' Vette.
Trying to decide if headers, tune and perhaps more are worth the cost as well as voiding my warranty.
I believe that is what the founder of this thread was also asking. Personally I could care less about sound, or whether one kind of header or axle-back exhaust sounds better than another. I don't make my performance or spending decisions based on "Sound Fluff".
I prefer results... https://youtu.be/pwFYHGRisUQ
I also prefer not to be embarassed!
I have headers and tunes in all my vehicles other than my 15' Vette.
Trying to decide if headers, tune and perhaps more are worth the cost as well as voiding my warranty.
I believe that is what the founder of this thread was also asking. Personally I could care less about sound, or whether one kind of header or axle-back exhaust sounds better than another. I don't make my performance or spending decisions based on "Sound Fluff".
I prefer results... https://youtu.be/pwFYHGRisUQ
I also prefer not to be embarassed!
If I couldnt drive no better than that he needed to lose the race.
Dazed Confused & Verklemp
Joined: May 2008
Posts: 1,397
Likes: 106
From: Naples, FL & Clear Lake, IA
Absotively Posolutely!!!! He made 4 runs and that was his best time. It was my WORST ET. Think it was his first time at a strip and car was a stick. I was hooking up great due to Nitto O5R's on the front. Most rear drive cars were really complaining about the track conditions. Ran against a 07' Z06 earlier. Had him by 2 lengths at 1/8. He beat me by 4 or 5 with a trap speed of like 122 against my 106.
7th Gear
Joined: Dec 2020
Posts: 7
Likes: 2
From: Orlando, FL
Drifting
Joined: Apr 2020
Posts: 1,350
Likes: 552
From: MN
Exactly why I'm getting headers and an X pipe.. The sound baby! I already have a supercharger for power :P
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Drifting
Joined: Apr 2020
Posts: 1,350
Likes: 552
From: MN
Agreed! I'm about the get either Kooks or ARH headers with x pipe. Putting it on the dyno and getting it tuned. I care more about the sound tho.
Melting Slicks
Joined: Oct 2009
Posts: 2,560
Likes: 485
From: Moberly, Mo
I guess I'm the guy who doesn't care what it makes on the dyno but its the drag strip that really tells you how much HP it makes. They will make a little more power which mine did. I think it was 17 hp with me tuning it. But at the track it went from 11.58@119 to a 11.22@124. However I ran a couple weeks ago and ran an 11.12@125, on another pass when it hung the shift in 1-2 and 2-3 it ran 11.23@126.28. So down track it makes more power then it showed on the dyno. Don't let these dyno number screw with your head, they are not always a factor to what happens at the track. If I were just running it on the street and not drag racing I'd leave the stock exhaust on it and just do E85 since its the best bang for the buck.
Last edited by 99vetteran; Mar 28, 2021 at 10:04 AM.
2nd Gear
Joined: Feb 2020
Posts: 2
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Drifting
Joined: Mar 2022
Posts: 1,367
Likes: 779
From: Indiana
I added a Borla Catless X Pipe, American Racing headers with high flow cats, MSD intake, Vararam cold air intake, a Tony Mamo ported throttle body and I pulled the heads and had Katech port them. After having the car dyno tuned it put down only 458 to the wheels. A bit disappointed with the gain. 2014 C7 A6
I just got 440 to the wheels with TS 2" headers, X pipe and a Holley CAI. Maybe find a better tuner? I'd be a bit upset with my tuner with those gains on those mods.