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Different situation for sure but my 14 RCSB 4wd 5.3 truck put down 445 bone stock with 7.5lbs Whipple kit, single exhaust and Sam's tune (AMP). Didn't dyno stock but should've been ~ 300. He dialed it back to 434 for safety because it's my money maker AC service truck. 44k miles later no issues except a leaking bypass valve a yr ago. Great kit imo. Bought a 16 4wd for street fun with Trick twins. Looking for 800+ when done.
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