TurboXS: Cobalt SS Turbo Exhaust Components - Free Shipping
turboxs is better anyway lol. IMO
Stock tune's learndown will prevent any gain after just a few days. It will see the changes in tables and then change them so the car makes the same power as stock. unless you are GM stage 1, or custom tune.
our learndown prevent PEAK gains, but it does not prevent mid range power gains.


