Manley pistons are machined of high strength 2618 material. Each design is lightweight yet robust enough to deliver long service life. Offset wrist pin design is utilized for quiet start-ups. Perfect ring groove to skirt squareness is achieved through our unique "one fixturing" manufacturing method that assures maximum horsepower. All GT-R pistons come with moly coated skirts. round wire locks, premium chrome moly wrist pins, and rings. 9310 alloy upgraded wrist pins are available.
 
2618 high strength material
Offset wrist pin for quiet start-ups
2.500" x .180" wall Premium Chrome Moly pin included P/N 42346
9310 alloy .210" wall pin upgrades available P/N 42546
Pressure balance groove
Will accommodate +1mm valve size
.260 Crown thickness
Round wire locks included
 
An Industry First! These pistons feature skirt diameters that correspond to the OEM Grade 1, 2 or 3 bores. Check the bore grades on the back of your block and order the appropriate quantities of Grade 1, 2 or 3 pistons. (Sold as -1 individual pieces, not sets.)