Icon Pistons IC890.030 Forged Flat Top Piston Set for Pontiac 400

The Icon Pistons IC890.030 forged piston set is engineered specifically for Pontiac 400 cubic inch V8 engines. These high-performance pistons feature a flat top design with a -4.5cc dish, providing an excellent balance of compression and detonation resistance for street and strip applications.

Key Features:

• Forged construction from 2618 aluminum alloy for superior strength and durability
• 4.150-inch bore diameter (0.030-inch oversize)
• Flat top design with -4.5cc valve relief for optimized combustion chamber geometry
• Precision machined ring grooves for improved ring seal and oil control
• Designed for use with 6.625-inch connecting rods (standard Pontiac length)
• Anti-detonation groove helps resist pinging under high load conditions

Icon forged pistons are manufactured to exacting tolerances and provide significant strength advantages over cast pistons, making them ideal for performance builds, forced induction applications, and high-RPM operation. Each piston is heat-treated for optimal hardness and includes precision-fitted wrist pins and locks.