i would suggest dropping the cat back and get something a little more free flowing (BR cat back), and maybe some GSC S2's in place of those 272's, I would ALSO get your manifold ported and gasket matched (from PPI, I think their prices are VERY reasonable). . . .I think the Invidia O2 is a waste of $$$ and will cause more issues in the end, but that's MO. . .

 

can u explain why u think the invidia o2 housing is a waste of money? I thought it showed some good gains? What kind of issues are u reffering too?