Engine Build Estimator
Build Calculator
Pick your engine, transmission, and rear end. Get HP estimates and cost projections instantly.
Select Engine
Your Build Summary
EngineLS3 6.2L
Transmission700R4
Rear End3.42:1
Horsepower
430–500
HP
Torque
425–470
LB-FT
Est. Cost
$9,400
– $18,100
LS3 6.2L
The go-to swap for G-Body. 430HP stock, 500HP with cam and headers.
Costs are estimates for parts only. Labor, fabrication, wiring, cooling, and accessories not included. HP/torque ranges based on commonly reported builds — results vary.