What size of pulley should i invest in for my 07 ss? Want to improve on top end.

 

is ur car stock???

 

Yea what are your supporting mods. You can't just throw a pulley on. You are going to need injectors, cooling mods, a header and down pipe

 

there is no room with stock injectors to make more boost. if you look at the gm stage 2 kit, just by upgrading the injectors they make a bunch more power, meaning it was lean to start with.

there are several options. if your under warrenty and would like to keep it, then go with the gm stage 2 kit and have the dealer install it, that was the car will retain warrenty without issues. if you are not/dont want to retain warrenty, go with one of the vendors upgrade kits. id recommend a kit that have 60lb injectors (skip 42s cause in the future when you want to go a little faster it means bigger injectors) and a 2.9-3.0" pulley. once you have other supporting mods, such as a heat exchanger, dual pass, header, exhaust, etc. you can then drop pulley size again.

 

See this thread
https://www.cobaltss.net/forums/2-0l...-guide-217195/

 

ok thanks guys! any other options i should do?

 

Actually read the sticky's and not just toss a thread up with no info in it at all....