Piston Set, 2618, Dome, 4.600 Bore, 1.120 CD, 0.990 Pin Dia, Set of 8.

Part Number 377907 (132739508)

UPC: 193564432261

Package contents: 1 Each per Box

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Description

JE Auto forged pistons from JE Pistons are the result of over 75 years of industry leading experience extended to our range of premium forged pistons for Chevrolet Big Block SR20 Headed Engines. JE Pistons are designed for each specific engine and racing application to provide the ultimate combination of durability and performance. From drift track to drag strip, JE Pistons’ performance is proven in victory lane time and time again. Equipped with the following custom level features

Features & benefits

Forged in the USA using 2618 aluminum, yielding high tensile strength needed for high-demand performance applications
Designed specifically for Chevrolet Big Block SR20 Headed Engines. To provide optimized performance durability
Proprietary Forged Side Relief (FSR) forging design minimizes friction and power loss with reduced skirt width and saves additional weight with a shorter wrist pin
Includes high-quality wrist pins, and locks
Made 100% in the USA
Smooth Crown Finish: Deburs all areas around the valve pocket and dome area, to reduces stress risers and prevent hot spots.
Contact Reduction: Reduce the amount of contact area against the cylinder wall when the piston "Rocks over". Contact reduction also serves to disrupt the flame travel into the crevice area causing a reduction in detonation.
Pin Fit: The pin bore is precision honed to attain an exact pin clearance. Clearances typically range from .0003 to .0010 between the wrist pin and pin bore.
Econo Undercrown Milling: Creates a lighter, more durable piston with uniform deck thickness in critical areas, offering excellent value through efficient machining.
Vertical Gas Ports: Machined gas ports channel combustion pressure behind the top ring for improved cylinder sealing and reduced blow-by under high load. Common in drag racing applications where maximum ring seal is critical.
Ultra Groove: Specialty ring groove machining process that provides near perfect groove flatness and surface finish. Tolerances are held to the millionths of an inch.

Specifications

2nd Groove Width	0.044 in
3D Undercrown Milling	No
Accumulator Groove	No
Anodize Top Ring Groove	No
Bore Diameter	4.600 in
Combo 2	No
Compression Height	1.120 in
Compression Ratio	0.58888888888889
Connecting Rod Length	6.535 IN
Contact Reduction	Yes
Country Of Origin	USA
Cylinder Head	64- Brodix SR20
Double Pin Oilers	No
DVGP	No
Econo Undercrown Milling	Yes
EN Plating	No
Engine	Big Block
Engine Detail	64- Brodix SR20
Engine Displacement	454 BB
Engine Family	Big Block
Engine Stroke	4.250 in
Engine Type	ICE
Exhaust Angle	13
Exhaust Depth	^.010
Exhaust Diameter	2.000
Forging Type	FSR
Gas Distribution	No
Intake Angle	20
Intake Depth	.335 in
Intake Diameter	2.565 in
Lateral Gas Ports	No
Make	Chevrolet
Mill Undercrown	No
Oil Groove Width	0.15000 in
Pin Fit	Yes
Piston Average Weight	605
Piston Head Type	Dome
Piston Material	2618
Piston Quantity	8
Piston Series	JE Pistons
Piston To Wall Clearance	-0.005999 in
Piston Volume	23.00 cc
Product Market	Domestic
Product Type	Engine Piston Kit
Skirt Coat	No
Smooth Crown Finish	Yes
Thermal Crown	No
Top Groove Width	0.04350 in
Tuff Skirt	No
Ultra Dome	No
Ultra Groove	Yes
Ultra Groove Plus Gas Port	No
Vertical Gas Ports	Yes
Wrist Pin Length	2.750 in
Wrist Pin Material	5115 Low Carbon Steel, Case Hardened
Wrist Pin Outer Diameter	0.990 in
Wrist Pin Wall Thickness	0.160 in

Warranty

30 Months

About JE Pistons

JE pistons are all designed, forged, and machined in-house, allowing control over every step of the piston-making process. JE Pistons 7+ decades of experience in high-level racing has led to offering premium racing features, including full billet construction, EN plating, and purpose-designed coatings, to name a few.

California residents

WARNING: This product can expose you to chemicals including nickel, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.