JE Pistons 312687 Forged Nitrous Series Gas Ported 4.625 Bore

JE Pistons, BBC 571, Bore 4.625, Stroke 4.250, Rod Length 6.535, Dome +28.9cc, 630 Grams, Set of 8

Special Price $1,155.59 Regular Price $1,283.99

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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.

Description

JE Pistons Nitrous Series pistons designed for nitrous featuring, vertical and lateral gas ports have been incorporated to optimize top ring seal and reduce friction. Ring grooves are machined to accept JE Pro Seal series J860 "HNS" Hardened Nitrous Series rings with .043 back-cut top ring, 1/16 taper face second ring, and 3/16 oil ring. Compression height figured using 9.780" deck height with zero deck clearance. Fits most open chamber cylinder heads. Part Number 258199 is designed for a decked block.

Includes:

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

Double spiro locks (#990-042-CS)

Vertical and Lateral gas ports

Contact reduction grooves

Compression Ratio:

110cc 13.6:1

118cc 12.6:1

124cc 11.9:1
Note: *Oil rail supports included. Made to order.*

Specifications

More Information
CNC Part Number	JE-312687
Price	$1,283.99
Manufacturer's Part Number	312687
Brands	JE
Part Types	Engine Piston
Departments	Parts
Vehicle Make	Chevy BB
Bore Size	4.625
Crankshaft Stroke	4.250
Rod Length	6.535
Piston Type	Dome
Compression Height	1.120
Piston Material	2618 Forged
Piston Ring Size	.043 1/16 3/16
Wrist Pin Size	0.990
Custom Notices	⚠ PROP 65 WARNING