Mopar Chrysler SB 318 340 360 BB 383 440 Internal Bal. Heavy Duty SFI Flexplate Speedmaster LS-series cylinder heads are

Speedmaster LS-series cylinder heads are rapidly expanding

Crafted from high-quality aluminum

Four corner water ports

stable air flow at any rpm

Speedmaster electric water pumps eliminate unnecessary weight and impeller drag experienced at high RPM

Mopar Chrysler SB 318 340 360 BB 383 440 Internal Bal. Heavy Duty SFI Flexplate Speedmaster LS-series cylinder heads areSpeedmaster flexplates make excellent upgrades to your stock design. They feature extra thick steel that's double welded to the ring gear for added strength and anodized for corrosion resistance. Speedmaster flexplates will withstand the extreme power and rpm of today's engines. Bolts directly to torqueflite converters