Wiseco ProTru Forged Piston- Dome Top - 4.030" Bore - 3.480" Stroke - 5.700" Rod - SB Chevy 350 42082BL 1/8 in NPT Female x

1/8 in NPT Female x 4 AN Male x 4 AN Male

8:1 compression ratio when used on 1987-95 TBI-equipped 7

Bearing Mount 620

These racks are designed for the 5

Mercury C4 automatic transmissions

Wiseco ProTru Forged Piston- Dome Top - 4.030" Bore - 3.480" Stroke - 5.700" Rod - SB Chevy 350 42082BL 1/8 in NPT Female xManufactured by Wiseco, ProTru Pistons are forged and affordable with features usually only found in more expensive pistons. Wiseco Pro Tru Kits include pistons and wrist pins. Ideal for racers on a tight budget. The pistons feature CNC machined domes, oversized valve pockets for use with larger diameter valves and higher lift camshafts, and precision reamed, pressure fed wrist pin oiling holes. Last but not least, the wrist pins are made from