TOMEI Forged Piston Set (95.50mm Bore, 31.20mm Compression Height) Compatible with Nissan VR38DETT (GT-R R35) - 4.1L Stroker Application

Rebuild your VR38DETT with a high-performance foundation using this TOMEI Forged Piston Set. Designed for 4.1L stroker applications , these pistons feature a 95.50mm bore size (OEM ±0.0mm) and a 31.20mm compression height (OEM -3.1mm) . They are compatible with the GT-R R35, providing a robust and durable upgrade for high-horsepower builds requiring increased displacement. Manufactured from A4032 aluminum using a high-strength forging process, these pistons offer superior high-temperature strength and durability compared to cast OEM pistons. This allows for reduced weight and thinner walls without compromising strength, lowering reciprocating mass for improved engine response. Each piston features a precision 3D profile (oval barrel shape) engineered with calculated thermal expansion to maintain optimal cylinder clearance. The set includes piston rings, pins, and clips for a complete drop-in assembly solution.

• 4.1L Stroker VR38DETT Pistons (95.50mm): Forged pistons with 95.50mm bore (stock bore size) and 31.20mm (OEM -3.1) compression height, specifically designed for 4.1L stroker engine builds in GT-R R35 applications.
• Precision-Engineered Specifications: Features -10.0cc piston volume, 23.0mm pin diameter, and lightweight construction with individual piston weight of 413g and pin weight of 133g for optimal performance.
• High-Strength A4032 Forging: Manufactured from A4032 aluminum using an advanced forging process for superior durability and high-temperature strength, allowing thinner, lighter walls that reduce reciprocating mass.
• Optimized Ring Package: Engineered for reduced friction with top ring (1.20 x 3.50mm), second ring (1.20 x 3.90mm), and oil ring (2.50 x 2.55mm) specifications.
• Complete Drop-In Assembly Kit: Includes valve recesses compatible with 1mm oversized valves, plus perfectly matched piston rings, wrist pins, and circlips—all components needed for a reliable, high-performance engine assembly.