CP Pistons Bullet Series Forged Pistons - Small Block Chevy 4.165 Bore (+0.040 in) - Set of 8

CP Pistons Bullet Series Forged Pistons - Small Block Chevy 4.165 Bore (+0.040 in) - Set of 8

CP Pistons SKU: CPPBC1100-040
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Forged 2618 alloy flat top pistons for a Small Block Chevy running a 3.750 in stroke and a 6.000 in rod, machined to a 4.165 in finished bore, which is 0.040 in over the 4.125 in standard and works out to roughly 409 cubic inches. Compression height is 1.125 in with a -6.9cc flat top crown and two symmetrical valve reliefs cut 0.310 in deep, giving about 11.4:1 against a 64cc chamber, so actual ratio will move with your own heads and deck height. Each set is balanced to within one gram and carries dual forced pin oilers, contact reduction grooves, accumulator grooves and a forged side relief. Chromoly wrist pins, wire locks and a 1.5mm, 1.5mm, 3.0mm ring pack are included, and CP catalogues this part for normally aspirated use.

Specifications

Type Forged flat top piston set (CP Pistons Bullet Series), Small Block Chevy
Material 2618 forged aluminum alloy
Bore 4.165 in
Size +0.040 in oversize (4.125 in standard)
Stroke 3.750 in
Rod Length 6.000 in
Compression Height 1.125 in
Dome / Dish -6.9cc flat top
Compression Ratio 11.4:1 with a 64cc chamber
Valve Reliefs 2 symmetrical, 0.310 in deep
Wrist Pin 0.927 in x 2.500 in chromoly, wire locks included
Ring Pack 1.5mm x 1.5mm x 3.0mm, included
Displacement 408.73 cu in
Application Normally aspirated
Quantity Set of 8
Part Number BC1100-040

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Returns

  • 30 days from delivery to request and ship back a return on new, uninstalled items in original packaging with all hardware.
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