Custom catalytic converters

Originally Posted by Danny_W

Of course you are entitled to any and every opinion you may have, but I did not photoshop any picture. Maybe you interpreted it wrong?

The graph shows a calculated 92% drivetrain efficiency, so the actual measured HP is about 348.

I remembered that Z1 motorsports makes a package with a cat, CAI and other intake and exhaust manifolds that makes 425-ish, my 379 is not even that strange.