Stock LM7 has almost 300 HP at 5800 RPM
The heads have been milled to 220 cc intake and 85 cc exhaust, all new valves, springs, lifters and rockers. Topped with a good cam and tuning. 450 is easily achievable. I doubt we turn it up too much with a stock bottom end.
High rise intake and bigger injectors just adds more oxygen and fuel to the fire.
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