AFR heads or blower?
 

Would AFR 165's be a good choice for my combo? What kind of gains would I see? My other option would be to get a Vortec A-Trim. What would I need to upgrade for the blower?

Thanks!

You're going to make more power with the A-trim than just adding the AFR's. I would upgrade your fuel pump and injectors. Didn't seem what injectors you run in your sig so I'm assuming it's the stock 19#'s. I would also add a bypass to the A-trim. Depending on your tune, you could make some really good power. Ask over at the Corral, there are many good combo's using the A-trim. A lot of dyno and track numbers. You will be surprised with some of the results. Good luck.

You already have heads. Forget the A-trim, go with the S-trim!

I agree, you have decent heads. Make th other upgrades necessary for the blower though. HOw is your powerband? That Xcam is pretty damn big.


Skyler

you already have heads so go with the blower I would go with the S-trim over the A-trim if your stuck on getting a vortec I but go with a intercooled procharger kit myself but I dont haave heads yet or the money for the blower so the choice is yours