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" 24-CHL-N-11 Rated at 190

Rated at 190

Wider angle (10°) locks to better distribute the ever increasing valve spring loads over the retainer than typical 7° locks (see drawing)

1972-1974 GMC K15/K1500 Suburban

Hedman Hedders X-Treme Exhaust Equalizer H-Pipe 18830 3 in

During development

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" 24-CHL-N-11 Rated at 190Similar 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.