- The B303 camshaft has a hydraulic roller lifter and a rocker ratio of 1.6. The aftermarket camshaft's official part number is M-2650-B303. The camshaft gives the engine better low-end torque, more high-end horsepower, and a decent idle.
- The intake valve opens at 5 degrees before top dead center (BTC) and closes at 39 degrees after bottom dead center (ABC). The intake valve has a total opening duration of 284 degrees and total closing duration of 224 degrees. The intake has a lobe lift of 0.3 inches and a valve lift of 0.48 inches. The intake has a lobe center of 107 degrees.
- The exhaust valve opens at 49 degrees before bottom dead center (BBC) and closes at 5 degrees BTC. The exhaust valve has a total opening duration of 284 degrees and total closing duration of 224 degrees. The intake has a lobe lift of 0.3 inches and a valve lift of 0.48 inches. The exhaust has a lobe center of 117 degrees.
- Vehicles with an electronic fuel injection (EFI) system must have a mass air induction system for the B303 camshaft to work properly. You should check the piston and valve clearance to ensure a proper fit. You should use a hi-stall torque converter if you are using the B303 camshaft on a vehicle with an automatic transmission.
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