Description
Item: JE Pistons, BBC 638, Bore 4.625, Stroke 4.750, Rod Length 6.700, Dome +28.9cc, 623 Grams, Set
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 9.800? deck height with zero deck clearance. Fits most open chamber cylinder heads. Part Number 258199 is designed for a decked block. Pin #990-2930-18-51S (174g) Double spiro locks (#990-042-CS) Vertical and Lateral gas ports Contact reduction grooves 110cc 15.1:1 118cc 14.0:1 124cc 13.2:1
Includes:
Compression Ratio:
Photo is for illustration purposes only
Specifications
SKU | JE-PIS-293085 |
Brand | JE Pistons |
Shipping Weight | 10.0000kg |
Shipping Width | 0.500m |
Shipping Height | 0.200m |
Shipping Length | 0.400m |