SRP Professional Pistons 329515 Forged 350/ 400 23° Dish 4.125 Bore

Small Block Chevy 350/ 400 SRP Professional pistons are the most advanced lightweight FSR forging that offers superior strength. SRP pistons are up to 20% lighter than traditional equivalent pistons. High-silicon 4032 aluminum alloy for reduced piston-to-wall clearance and quiet operation. Accumulator grooves for improved ring seal. Designed for normally aspirated or moderate forced induction nitrous engine applications. SRP professional pistons come standard with high-performance skirt coating and low drag performance piston rings.

Lightweight, low friction metric ring package included

1.2mm Carbon Steel top ring, 1.5mm Napier 2nd ring, 3.0mm standard tension oil ring

Napier 2nd ring for improved oil control

Minimal filing required

Pins and Locks

High quality 2.250" pin further reduces reciprocating weight

Carbon steel wire locks included

Compression Ratio:

58cc 11.2:1

64cc 10.5:1

70cc 9.9:1
Note: *Oil rail supports included.*