Re: 5.7l pistons
I don't know if there is a "horsepower rating" on the pistons, but I do know that they are fairly weak due to the top ring land being too close to the piston top. This is why you can't get away with running a lot of boost with forced induction, or a very big shot of nitrous oxide. Without increasing compression pressure too much, you could pretty easily get somewhat over 500 horsepower out of a 5.7 engine though.....heads/valves, cam, exhaust, throttle body, etc., without damaging with the rotating assembly.
05 LX/RT & 06 WK/GCO, modded similarly, MDS "ON" Light, Vortex Gens, Debadged, DashHawk, BT Catch Can, SRT CAI W/Add Air Inlet, K&N Filter, Sonnax Trans Press Booster, SC Tuner W/Adv Trans Tuning App, DS Tuner, Cust tube headers w/3 in. catback, Bilsteins, SRT frt/rear bumpers, Eibach SRT Lwr Sprgs & Sways, FRI Sidewinder Cam Adv 2*, 6.1 valvetrain, SLP 25% UD Pulley, BBK 90mm TB, SOS Coils/.060 plug gaps. 20 in. SRT Reps.