TEA stage 3 heads 5.3L, milled to 57cc, big valves. 232/236 .575/.578 112LSA
452hp/415tq peak. 385ft-lbs of tq @ 3500RPM's, big power down low.

And there still is bit of power left out there for me to pick up like an EWP, get my FAST ported out, tune more, cutouts, better headers, or better heads like the new TFS heads.

 

I just finished a dyno tune on a 2002 M6 SS. The customer had purchased and installed TSP's MS3 with the 5.3L 2.5 heads, he had every bolt-on pretty much (Fast 90/90, EWP, U/D Pulley, 1-3/4 LT). He put down 454.8rwhp and 401.xrwtq on a Dynapack dyno (SAE). I will see if he can post in the Dyno Section about it. This thing fired up and idled like "stock" after I completed the tune. If you want 450rwhp, TSP is the package!