Is there a verified recipe to achieve 500 crank hp? I don't really like saying 472.

 

“Nearly 500HP”
“Almost 500HP”

Or just lie. Who’s going to prove otherwise? Only if you’re dumb enough to take a bet on your lie would you get caught. Anyone presses you, be honest like you did here…”I don’t like saying 472"

 

Better breathing intake, synthetic oil, and freer flowing exhaust would probably get you there.

 

I think you need a full exhaust and tune. This should get you to the 410+ rear wheel horsepower on a dyno you'd need to be sure you're around 500 at the crank.

 

Intake, exhuast, headers etc. I rarely visit the IS-F or RC-F forums but they probably have tons of recommendations to increase performance.

 

You could be the first for this https://www.rr-racing.com/RR-Racing-...is5scr1001.htm Then you can say 670

 

intake exhaust tune will get u 420ish wheel which is 530HP