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" Sway Bar Bushing Duration 276 / 282

Duration 276 / 282

Standard Cuffed Gauntlet

an internal fan

They're available in our all-new Hard Core Gray(TM) hard coat anodized finish with Black(TM) billet for improved corrosion protection

so belts ride at the perfect distance on your particular engine

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" Sway Bar Bushing Duration 276 / 282Similar 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.