Icon Pistons IC10020-040 Fits SBC 383 4V Dish 18cc Bore 4.040

Icon's FHR (Formed Head Relief) pistons deliver quality on a budget. FHR pistons have valve reliefs that are formed into the piston as the forging blank is pressed into the die. Many of the FHR dome pistons feature a solid dome. This gives engine builders the flexibility to machine the dome to their desired compression ratio. FHR pistons are 11% silicon which means they can be installed with tighter piston to wall clearance. In addition, the use of 4032 aluminum decreases the friction created during engine operation, this results in extended piston life and reduced wear

Mini grooves allow an overheated pistons to transfer heat to the wall

Skirts machined by UEM's unique in house built cnc machines

Die formed relief valves

Accumulator groove to help eliminate flutter and maximize ring seal

Wrist pins and spiral lock included

1/16 x 1/16 x 3/16 not included

Compression Ratio 58cc 10.2:1, 64cc 9.6:1, 76cc 8.6:1

Advertised piston weight 410 grams, 132 gram wrist pin

OE Deck Height 9.025"

Note: Standard bore size is 4.000
Replaced IC9965