CP Pistons Bullet Race Series Forged Piston Set - Small Block Ford 4.125 STD Bore 4.100 Stroke 6.200 Rod - Set of 8

CP Pistons Bullet Race Series Forged Piston Set - Small Block Ford 4.125 STD Bore 4.100 Stroke 6.200 Rod - Set of 8

CP Pistons SKU: CPPBF6155-STD
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CP's Bullet Race Series pistons are forged from 2618 aluminum, the ductile alloy CP specifies for severe duty nitrous, blower and turbo builds. This set is machined to a 4.125 in standard bore and matched to a 4.100 in stroke on a 6.200 in rod, a 1.250 in compression height that works out to 438 cubic inches in a small block Ford. The crown is flat top with a single valve relief cut 0.280 in deep on the intake side, a net crown volume of -8.73cc that returns 11.9:1 compression against 62cc cylinder heads. Each piston weighs 438 grams and is balanced to within 1 gram, with dual forced pin oilers, contact reduction grooves, accumulator grooves and forged side relief. Chromoly wrist pins, wire locks and a 1.5mm / 1.5mm / 3.0mm steel ring set are supplied with the set.

Specifications

Type Forged flat top piston set (CP Bullet Race Series)
Application Small Block Ford, 438 cubic inch
Material 2618 forged aluminum alloy
Size STD (standard 4.125 in bore, no oversize)
Bore 4.125 in
Stroke 4.100 in
Rod Length 6.200 in
Compression Height 1.250 in
Crown Flat top, -8.73cc net (valve relief volume, not a dome or dish)
Valve Reliefs 1, 0.280 in intake
Cylinder Head Chamber 62cc (basis for the quoted compression ratio)
Compression Ratio 11.9:1 with 62cc heads
Wrist Pin 0.927 in diameter x 2.500 in chromoly, included
Ring Pack 1.5mm / 1.5mm / 3.0mm steel ring set, included
Piston Weight 438 g, balanced to within 1 gram
Gas Ports No
Included 8 pistons, wrist pins, wire lock retention rings, ring set
Quantity 8 (set of 8 pistons)
Part Number BF6155-STD

Shipping

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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.
  • Standard returns: 8% restocking fee on the item price before tax and shipping. Shipping is not refunded in either direction. All waived if the item is defective or we made the error.
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  • Product images may be representative. The SKU and specifications in the listing are what ships.
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