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did you guys see any substantial gians after the headers install?
These are the only known ( that I found) posting of any before and after dynos of the S&S headers.
Pearlpower's SC430 dyno - I blieve he has an intake and an exhaust
I too am interested in installing these headers before having an aftermarket exhaust put on. Does anyone know if the headers will do anything without having an aftermarket exhaust on?
Has anyone installed these headers and kept the stock exhaust system? Just wondering what the HP gain might be and what it would sound like.
They are in fact designed to work with the stock exhaust and work very well. Power, torque and response are all improved especially on the 430s. Sound level is barely changed and unnoticeable in almost all conditions.
Well the first step is done...I have my dyno numbers for my basline. Here's the thread I posted about it: https://www.clublexus.com/forums/sho...8&goto=newpost
. Anyway my numbers are 248 rwhp and 253 torque. Next week the plan is for me to install the headers and do another dyno run. I'll post the results once that is completed. Stay tuned.