Icon Pistons IC958-040 Fits Chevy W-Head Dome 89.1cc Bore 4.165

Icon Forged Pistons are forged from high ductile 2618 alloy. They have dual forced pin oiling on most applications and offer lateral gas porting on high compression ratios. They are fully machined with deep valve Chevy LS Icon Forged Premium Pistons are forged from 2618 alloy. With a 1% silicon content 2618 alloy they are formulated and heat treated for the most demanding performance applications such as very high compression ratios, boosted application and nitrous

Crown and valve reliefs are cnc machined

Top land mini groove technology

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

Accumulator groove to help eliminate flutter and maximize ring seal

Skirt and pin boss struts designed to withstand heavy loads from high cylinder pressures

Wrist pins and spiral lock rings included

1/16 1/16 3/16 rings not included

Compression Ratio 10.8:1

Advertised piston weight 642 grams, 141 gram wrist pin

OE Deck Height 9.600"

Note: Standard bore size is 4.125

Note: Centered Pin. Compression Height is to the top of the Dome. Stroked 348 Chevy

Note: Ships direct from manufacturer