You're going to get a lot of people telling you the GTM kit is better on this board. Lots of people had issues with the Stillen one for some reason or another. I had good luck with the Stillen and make 450whp(dynojet) all day long with 0 issues. Personally, I think that if you want 450whp on a mustang dyno, you're not going to get that from an SC kit...you want a TT.
I think I've essentially maxed out the stillen SC at 9psi. I guess I could go 10 psi and make like 465-470, but at the expense of safety...whats the point.
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