Originally Posted by sdiver
Minus 22 HP claimed for the exhaust
= 501 HP stock...underrated by ~21 HP using the above assumed drivetrain loss of 10%.
= 525 HP stock using 15% drivetrain loss, so ~45 HP underrated.
So i guess it's not really "MASSIVELY UNDERRATED"
. Anywhere from 21hp to 45hp of under-rating. I wonder how are they going to pass the final SAE certification.