As Yogi would say “it’s déjà vu all over again” – no one is ever going to give a money-back guarantee on HP or torque claims…maybe a warranty on parts but nothing else. People who buy performance packages (I’m one) shouldn’t think someone is going to guarantee 400hp, etc. - never happen.

 

i did before and after dynos with my set up and gained nothing..

 

I am suspecting that the big unknown in this equation is the adaptive ECU.


Here's some similar discussion over in the Cayman section:
https://rennlist.com/forums/987-forum/319947-new-header.html