Manley 625GR3-1 Platinum Series Forged Piston 95.5mm Flat Top Grade 3

The Manley 625GR3-1 is a high-performance forged piston from Manley's Platinum Series, engineered specifically for Nissan GT-R VR38DETT 3.8L engines with 88.4mm stock stroke. This Grade 3 piston is designed to match OEM bore specifications and deliver exceptional durability for high-performance and forced induction applications.

Key Features:

• Forged from high-strength 2618 aluminum alloy for superior strength and thermal stability
• 95.5mm bore diameter with flat top design and -1.5cc volume
• Grade 3 specification for precise piston-to-wall clearance of .0032" - .0039"
• 9.25:1 compression ratio optimized for performance applications
• Moly-coated skirts for reduced friction and improved durability
• Offset wrist pin design for quieter cold starts and reduced piston rock
• 1.350" compression height with cam and barrel skirt profiles
• Pressure balance groove for improved ring seal and reduced blow-by
• Accommodates +1mm oversized valves for increased flow potential

What's Included:

• Single forged piston (sold individually, not as a set)
• Premium steel top ring set with Napier second ring from Total Seal
• 9-13 lb tension oil ring for excellent oil control
• Premium chrome-moly wrist pin (Part #42346): 23mm diameter, 2.500" long, .180" wall, 132 grams
• Round wire locks for secure wrist pin retention

Manley pistons utilize a unique "one fixturing" manufacturing method that ensures perfect ring groove to skirt squareness, maximizing horsepower and reliability. These pistons are designed to match OEM grading systems—check the bore grades stamped on the back of your cylinder block to ensure you order the correct grade for each cylinder. Optional 9310 alloy upgraded wrist pins with .210" walls are available separately for extreme-duty applications.