JE 258239 Piston Kit 502 Nitrous Series (4.530 in. Bore, 1.270 in. CH, 45.00 CC) for CHEVROLET Big Block Engine

Description JE 258239 Piston Kit 502 Nitrous Series (4.530 in. Bore, 1.270 in. CH, 45.00 CC) for CHEVROLET Big Block Engine

JE Pistons applies over 75 years of experience to its range of premium forged racing pistons for European, import, and sport compact applications.

Engineered, forged, and machined 100% in the USA, these pistons are Designed for each specific engine and racing application to provide durability and performance.

• Forged from 4032 aluminum for tensile strength and minimal thermal expansion
• Proprietary Forged Side Relief design minimizes friction and power loss while reducing skirt width, weight, and Wrist Pin length
• Application-dependent skirt coating reduces friction, piston skirt and cylinder Wall wear, and operating noise
• Application-dependent accumulator groove reduces combustion gas pressure and Piston Ring flutter while improving ring seal

Specifications:

• Piston Series: JE Pistons
• Cylinder Head: OPEN CHAMBER
• Bore Diameter: 4.530 IN
• Piston Head Type: Dome
• Compression Height: 1.270 IN
• Piston Volume: 45.00 CC
• Piston Material: 2618
• Piston Quantity: 8
• Forging Type: Round
• Piston Average Weight: 652 GR
• Ring Set Included: No
• Top Compression Ring Thickness: 1/16 IN
• Second Compression Ring Thickness: 1/16 IN
• Oil Ring Thickness: 3/16 (Rail Support) IN
• Wrist Pin Outer Diameter: 0.990 IN
• Wrist Pin Length: 2.930 IN
• Wrist Pin Wall Thickness: 0.180 IN
• Intake Depth: .300 IN
• Intake Diameter: 2.400 IN
• Intake Angle: 25
• Exhaust Depth: ^.100
• Exhaust Diameter: 2.100
• Exhaust Angle: 16
• Top Groove Width: 0.06400 IN
• 2nd Groove Width: 0.06400 IN
• Oil Groove Width: 0.21800 IN
• Big Block