Manley 599205CE-8 Platinum Series Piston Set 4.130 in. Bore -31cc Dish Extreme Duty GM LS

With a 4.130-inch bore diameter, 1.315-inch compression distance, and a -31cc dish crown, these pistons are engineered to deliver exceptional strength and performance in high-output LS builds.

The "CE" designation indicates this set includes Extreme Duty 9310 alloy wrist pins (P/N 42528, 2.500" x .210" wall), providing additional durability over the standard chrome moly pins. These pistons are purpose-built for LS-1, LS-2, LS-3, LS-6, LS-7, and LS-9 engines with a 4.250-inch stroke and displace approximately 484 cubic inches.

Key Features:

• Bore Diameter: 4.130 inches
• Compression Distance (CD): 1.315 inches
• Crown Volume: -31cc dish
• Wrist Pin Diameter: .927 inches
• Stroke: 4.250 inches (484 CID)
• Ring Package: 1.5mm top ring (.225" down), 1.5mm second ring, 3mm oil ring
• Crown Thickness: .200 inches
• .175" trough dish design accommodates maximum valve sizes of 2.205" intake / 1.625" exhaust
• Extreme Duty (CE) 9310 alloy wrist pins included
• Compatible with Manley and third-party ring sets

Manley Platinum Series pistons are machined from domestic 2618 alloy forgings for superior strength. The proprietary cam and barrel skirt profiles protect cylinder walls while maximizing power output, and Manley's unique single-operation fixturing ensures perfect ring groove-to-skirt squareness for optimal ring seal. Moly skirt coatings reduce friction and extend service life, making these pistons the preferred choice of professional engine builders for high-performance LS applications.