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Vehicle Info NeededSRPPART NUMBER: 867-139626
SRP Inverted Dome Pistons for Small Block Chevy 400 Bore 4.165"
$73499
Ships on 09/30/2026
Lowest Price GuaranteeSRP Inverted Dome PistonsSmall Block Chevy 400 (+.040") Bore: 4.165" Stroke: 3.750 (409ci) Rod Length: 5.700" Dome Volume: -21cc Weight: 489 grams Compression Height: 1.425" 1/pkg
400 Block with 3.750" Stroke
Compression Ratios
- 58cc 10.4:1
- 64cc 9.8:1
- 70cc 9.2:1
Ring Groove Sizes
- Top Ring: 1/16"
- Second Ring: 1/16"
- Oil Ring: 3/16"
- Inverted dome utilizes radius tooling to eliminate hot spots. Symmetrical valve reliefs for universal installation. Valve reliefs cut for oversized valves and most street/strip camshafts. Lower ring lands and thicker crown for increased durability. High silicon alloy for tighter piston to wall clearance. Can be used in small blower and nitrous applications. .927'' x 2.750'' x .150'' straight wall carbon steel wristpin (130g) included. 1/16, 1/16, 3/16'' ring grooves.
Part TypePiston
Product LineSRP SB-Chevy Low Compression Forged Pistons
BrandSRP
Package Height5.9
Package Width11.2
Package Length25.3
Weight14.89 PG
Part CategoryPerformance Parts
Part FitmentSemi Universal
Vendor Part Number139626
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
