Ive got a 96Z A4, with 373's, 3000 vig,cutout,cai, and rear suspension works. The cars runs 13.40's at 99mph. Im looking into some aftermaket heads/cam and need some advice on part numbers to get. I like the AFR heads and hear they work well. I do however want to keep my car smog legal. Also how much do you think a heads/cam combo will pick my car up in the 1/4mile?

Thanks guys..

 

I would just get your stock heads ported by a reputable porter like .www.advancedinduction.com . And if you want to stay emissions legal get a combomotorsports xe224/230 cam.