MS4 cam. What heads?
http://www.texas-speed.com/p-1163-pr...der-heads.aspx
For a bit more budget friendly head, but at the expense of some of that power, I'd recommend the PRC Stage 1 LS6 heads.
http://www.texas-speed.com/p-1391-pr...ted-heads.aspx
Either will be setup to clear on a stock LS1 short-block without having to flycut your pistons!

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Im running the MS4 with 799 heads on a4 also. mods in sig, just got it dynod 430rwhp on motor /550 on so so bottle pressure 150 shot no track times yet
However, I set my limiter at 7300 and shifted just after 7k.







