JE Pistons NIS QR25 9:1 89.5KIT Set of 4 Pistons - 291880

As the leader in forged racing pistons, JE Pistons has applied over 75 years of experience to its wide range of premium forged pistons for European, import and sport compact applications. Engineered, forged and machined 100% in the USA, JE Pistons are designed for each specific engine and racing application to provide the ultimate combination of durability and performance. From drift track to drag strip, JE Pistons' performance is proven in victory lane time and time again. Equip your engine with the best in forged pistons.

Features & Benefits

• Forged in the USA using 2618 aluminum, yielding high tensile strength needed for high-demand performance applications
• Designed specifically for each engine and use application to provide optimized performance durability
• Proprietary Forged Side Relief (FSR) forging design minimizes friction and power loss with reduced skirt width and saves additional weight with a shorter wrist pin
• Skirt coating (depending on application) reduces friction and wear on piston skirts and cylinder walls while simultaneously reducing operating noise
• Accumulator groove (depending on application) helps reduce pressure from combustion gases, reducing ring fluttering and improving ring seal for consistent power
• Includes high-quality wrist pins, locks, and JE Pro Seal premium piston rings
• Made 100% in the USA

Specifications: Piston Set, 2618, Inv Dome/Dish, 3.524 Bore, 1.260 CD, 0.787 Pin, Set of 4.

JE designs are specifically engineered for extreme upplications up to, and including, professional competition

Detailed Specifications

• Piston Volume: -16.10 cc
• Intake Depth: .080 in.
• Top Compression Ring Thickness: 0.0400 in.
• Top Groove Width: 0.04000 in.
• 2nd Groove Width: 0.048 in.
• Second Compression Ring Thickness: 0.0480 in.
• Oil Ring Thickness: 0.111 in.
• Oil Groove Width: 0.11100 in.
• Wrist Pin Wall Thickness: 0.180 in.
• Intake Diameter: 1.300 in.
• Intake Angle: 10
• Wrist Pin Length: 2.250 in.
• Engine Stroke: 3.937 in.
• Piston Average Weight: 351 g
• Piston Quantity: 4
• Connecting Rod Length: 5.630 in.
• Wrist Pin Material: 5115 Low Carbon Steel, Case Hardened
• Bore Diameter: 89.50 mm
• Ring Set - Recommended: JG1001-3524
• Cylinder Head: LSX
• Engine: QR25DE
• Forging Type: Round
• Accumulator Groove: Yes
• Pin Fit: Yes
• Ring Set Included: Yes
• Skirt Coat: Yes