JE Pistons 353420 Forged 12°/ 14° Nitrous 632 Flat Top 4.625 Bore

JE Pistons, BBC 638/ 588, Bore 4.625, Stroke 4.750/ 4.375, Rod Length 6.700/ 6.480, Flat Top -7.3cc, Set of 8

Special Price $1,109.64 Regular Price $1,260.95

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⚠ PROP 65 WARNING

⚠ WARNING: This product can expose you to chemicals, which are known to the State of California to cause cancer. Please contact us to obtain a list of harmful chemicals. For more information, go to www.P65Warnings.ca.gov.

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Description

JE Pistons specifically designed for Naturally Aspirated/ Nitrous-fed 632 engines using aluminum rods. Valve reliefs fit following cylinder heads: 12º Raptor, 12º Pro-Filer, Dart Big Chief 14º (program #'s 3815 & 384), Sonny Tru-Pro 14.5º, and Brodix PB1200. Precision CNC machined ring grooves are designed for .043 back-cut top rings, .043 D-wall 2nd rings, and 3/16mm oil rings. Compression distance and compression ratio calculated with zero deck clearance at listed block height.

Includes:

Pin #990-2930-18-51S (174g)

Double spiro locks (#990-042-CS)

Rail Supports(# 4600-203)

Contact reduction grooves

Double Forced Pin Oilers

Accumulator Grooves

Vertical gas ports for maximum top ring seal

Block Height: 10.195/ 9.788

Compression Ratio:

65cc 16.5:1/ 15.4:1

70cc 15.7:1/ 14.6:1

77cc 14.6:1/ 13.7:1
Note: *Made to order. Ring Package .043, .043, 3.0mm.*

Specifications

More Information
Price	$1,260.95
Vehicle Make	Chevy BB
Bore Size	4.625
Crankshaft Stroke	4.375, 4.750
Rod Length	6.480, 6.700
Piston Type	Flat Top
Compression Height	1.120
Piston Material	2618 Forged
Piston Ring Size	.043 .043 3.0mm
Wrist Pin Size	0.990
Custom Notices	⚠ PROP 65 WARNING