Although the standard Mast LS7 SS is rated at 650 hp and 560 lb-ft, the optional FAST intake manifold on our test engine increased those numbers to 669 and 583, respectively. At just 2,500 rpm the motor is already producing over 400 lb-ft, yet the big LS7 keeps on pulling past 7,000 rpm. How's that for a flexible power curve? To keep the test data as accurate as possible, Mast prefers step testing its engines on the dyno instead of the more common sweep testing procedure.
Mast Motorsports LS7 Crate Motor - Going Overbored
An Inside Look At Mast Motorsports' 669HP LS7 Crate Motor
Mast MotorsportsNagodoches, TX 75964