350 Small Block Chevy - Inverted Dome Forged Piston 148750 SRP148750 383 c.i., 4.030" bore, 3.750" stroke, 5.700" rod length, -31.0cc dome volume SBC 4.030" PISTONS -31cc DISH JE Pistons SRP line is proud to offer huge performance for the price. Forged from strong, 4032 aluminium alloy material, SRP pistons blend strength with affordability, offering an excellent performance bargain for performance rebuild and street/strip applications. (some applications in 2618)

Features:

4032 low expansion high silicon aluminum alloy heat treated to SRP specifications

Ring land and crown thickness specifically engineered for mild turbo, supercharged and nitrous applications

Forced Pin Oiler for increased wrist pin lubrication

Pin fitting and double spiro locks included

927-2750-150 wall wrist pin (130 grams) included

CNC Machined ring grooves accept 1/16, 1/16, 3/16 rings (Rings Sold Separately)

Optional bearing steel pins available.

Specifications:

Engine: SMALL BLOCK CHEVROLET

Bore Diameter: 4.030

Compression Height: 1.425

CompressionRatio with 58cc chamber volume: 9.0

Compression Ratio with 64cc chamber volume: 8.5

Compression Ratio with 70cc chamber volume: 8.1

Piston Volume: -31.0

Cylinder Head: CHEVROLET 23 DEG 20/30

Piston Pin Outside Diameter: 0.927

Piston Pin Length: 2.750

Piston Pin Material: 5115

Ringset Included: No

Top Compression Ring Thickness: 1/16"

Second Compression Ring Thickness: 1/16"

Oil Ring Thickness: 3/16"

Piston Material: 4032

Forging Type: FSR

Piston Avg Weight: 473

Pin Wall Thickness: 0.150

Piston Type: Dish

Ring Set: S100S8-4030-5