JE Pistons Tour Series GP (Gas Ported) Flat Top Forged Piston Set - SB Chevy 359 C.I. - Bore" 4.040" - Stroke: 3.500" - Rod Length: 6.000" SPBL3 Engine Side

Engine Side

Cap Features Knurled Finish/O-Ring Seal

Silver Anodized

This 289-302 Windage tray mounting kit includes four accessory mounting main cap studs

JE Pistons Tour Series GP (Gas Ported) Flat Top Forged Piston Set - SB Chevy 359 C.I. - Bore" 4.040" - Stroke: 3.500" - Rod Length: 6.000" SPBL3 Engine SideSimilar to the Ultra Light GP, this piston has undergone engineering changes to handle higher horsepower 4 barrel applications (approximately 650 hp) and angle milled heads. Both 350 and 400 series accept oversize valves (intake pocket is 2. 255" and the exhaust pocket is 1. 870") and long duration, tight lobe separation cams. The ring grooves are precision machined for . 043, . 043, 3mm back cut rings with lateral gas ports for superior ring seal.