ok, after u install these three things do u have to dyno your car?...and also is it better to go with test pipes or hfc?...ive heard testpipes

 

Thanks Gamma! How do you like the pulleys and headers? I'm toying with the idea of installing both with high flow cats, what's the gain like? I'm not sure if any header mods are street legal in Cali... Yeah, I especially like the LS with the clear corners and the burnt tips of my exhaust, they just compliment one another... Got any pics?

 

I'm assuming you mean dyno tune your car, eemon10? I haven't had mine tuned yet, still waiting for someone to crack the programming of the '06 ecu and do it right. I just bolted on (err... paid Gruppe-S mechanics to bolt on) everything and drove away! Runs great with noticeable improvements! I know I'm being nitpicky, but it's really 5 things, not 3... Test pipes will perhaps yield more gains in theory, but since I don't have either I really can't comment. I hate to repeat myself, but The Best Thing I Ever Did To My G!!!

 

I bought my 5/16 iso spacer and mrev2 directly from motordyne and both items showed up in a shallow (thin) box only with motordyne sticker on top...

 

Nice, I actually have the exact same set up with a lightweight KJR pulley. All great mods.