SPEED PRO Hypereutectic Dished Pistons+MOLY Rings Kit Chevy 400 use 5.7 rods 040

This item is for eight (8) .040 over bore Speed Pro (Sealed Power) hypereutectic dished pistons and a moly piston ring set (Hastings/MAHLE) for Chevrolet 400ci small block V-8 engines using a 5.70-in. connecting rod. P/N (8) H615CP-040 + 2M661-040. These pistons must be used with the longer 5.700-in. length connecting rods.

If you're looking for pistons with an unbeatable combination of performance and value, then Speed-Pro hypereutectic pistons are for you. These pistons are manufactured from aluminum alloy that contains 16 percent silicon for greater strength and wear resistance. They're also molded in the latest permanent-mold technology to ensure the precise fit and tight bore clearances that today's top engine builders demand. Hypereutectic pistons are ideal for use in high performance street, bracket, and oval track racing—and will work perfectly with normal ring end gaps.

PISTON SPECIFICATIONS

• Bore: 4.165 in. (at .040 bore)
• Stroke: 3.750 in. (stock)
• Connecting Rod Length: 5.700 in. (longer than stock); rods NOT included
• Piston Top Style: Dish top with 4-valve reliefs
• Piston Head Volume: +12.50cc
• Compression Height: 1.425 in.
• Piston Material: Hypereutectic aluminum
• Wrist Pin Diameter: .928 in.; pins included
• Wrist Pin Style: Press-fit or floating; pin clips NOT included
• Ring Land Sizes: 5/64-5/64-3/16 (oil ring); rings included
• Notes: DurOshield coated skirts; These can be free floating but locks must be purchased separately.
• Usage: Street and mild strip; up to 75HP nitrous
• RPM Range: Idle - 6,000
• Compression Ratio (approximate): 10.79:1 w/58cc; 10.14:1 w/64cc; 9.08:1 w/76cc

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