Carrillo DHR7030-8 High-Performance Diesel Piston Set 6.6L Duramax 4.075 Bore 16.5:1 CR

Designed to work in conjunction with Carrillo's 6.620" connecting rods (featuring a 0.202" longer rod and 0.202" shorter compression height), these pistons deliver a significant reduction in reciprocating mass compared to the factory assembly — approximately ½ lb lighter per cylinder, totaling roughly 4 lbs saved off the rotating assembly.

Key Specifications:

• Bore: 4.075"
• Compression Ratio: 16.5:1
• Dish: -0.410"
• Pin Diameter: 1.156" Top Fuel-style pin

Construction & Features:

• Forged from 2618 T-61 alloy for superior strength under extreme heat and pressure
• Full hard anodized coating on ring grooves and piston body to resist wear from turbocharging, supercharging, and elevated cylinder temperatures
• Comes standard with a 1/16" (2mm) coated top ring, 2.0mm second ring, and high-tension 3.0mm two-piece oil ring
• Steel 5115 wrist pins with .082 Kramm Lox pin locks included
• Radius oversized valve reliefs for increased valve lift clearance
• Forged side reliefs and precision milling for reduced rotating weight

These pistons are engineered for serious diesel performance builds — from high-boost single and compound turbo street trucks to all-out competition engines. The DHR7030-8 piston set is designed specifically for use with Carrillo's 6.620" hybrid connecting rods to achieve the proper compression height and rod-to-stroke ratio without requiring a deck plate.