Originally Posted by
Daddy
There are no before and after dyno sheets. I know because I asked the owner. The claimed HP gains are they quoted are based off the same header design for either the 55 or 63, I don't remember which making an additional 45-55 hp
Do they have them installed on a single vehicle? Seems easy enough to have that vehicle hit a dyno and put some meat on the bones of the $3,000 30-horse claim... Even if it's modded, we know these cars well enough to see where the gains take place.