JB4 C63 vs BMW on Dyno
Needs Intakes or Stock Airbox Holes/Spacer to remove some restriction should add another 15-20whp across
My '17 C63 non-S with JB4 on map 5 (and 25% ethanol mix) trapped 125-126 mph, which translates to well over 510 whp.
Last edited by LessIsMore; Jan 4, 2022 at 07:23 PM.


