david borla
Well-Known Member
- Joined
- Apr 6, 2016
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- 0
- Messages
- 123
- Reaction score
- 164
- Location
- Oxnard, CA
- Vehicle(s)
- 2015 Mustang GT
2.75" makes slightly more power through the RPM and at WOT also so we used 2.75"
You'll find that other exhaust companies are quoting about 15hp increase over stock at peak HP with a 3" exhaust and the stock manifolds/cats. I can tell you from experience that larger diameter lose power in the lower RPM range.
Our 2.75" exhaust consistently made a little over 18hp at peak HP with a more consistent increase throughout the RPM range. Some of the runs were even higher but we're quoting an 18HP increase.
Which is why Ford used 2.75". This is a "halo" car for Ford and the whole point of this car is to show the world what they can do, how well their cars perform etc. They surely have access to the 3" pipes and tooling necessary to make a 3" exhaust, they have access to the best computer modeling software available, flowbenches, dynos, track testing etc. and if 3" made more power they would have used it for this car.
Anyhow, our system is 2.75"
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