Got this from another thread he posted 2 weeks ago:

06 Silverado RCSB 4.8, 3.73 gears, Pacesetter long tubes with full true dual exhaust through Magnaflow race mufflers, Cam Motion 221/226 .550/.575 114lsa, Comp Cams 918 springs, Comp Cams 7.400 hardened pushrods, Airaid Cold Air Intake
RPM dyno tune 306rwhp/290rwtq