BMW S65B40 Piston Kit

Part Number 371716 (155626092)

UPC: 193564437730

Package contents: 1 Each per Box

Unavailable

Description

Sport Compact, Import and European 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 BMW S65B40 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

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.

Features & benefits

Made 100% in the USA
Accumulator Groove: A specialty groove between the top and second ring provides added volume for blow-by gases. This helps reduce pressure between the rings, improving top ring seal and minimizing ring flutter at high cylinder pressures.
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.
Skirt Coat: Skirt Coat reduces friction and wear on piston skirts and cylinder walls while simultaneously reducing operating noise
Forged in the USA using 2618 aluminum, yielding tensile strength and minimal thermal expansion
Designed specifically for BMW S65B40 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, locks, and JE Pro Seal premium piston rings

Specifications

2nd Groove Width	0.048 in
3D Undercrown Milling	No
Accumulator Groove	Yes
Anodize Top Ring Groove	No
Bore Diameter	92.00 mm
Combo 2	No
Compression Height	1.079 in
Compression Ratio	0.50347222222222
Connecting Rod Length	5.540 IN
Contact Reduction	No
Country Of Origin	USA
Cylinder Head	S65B40
Double Pin Oilers	No
DVGP	No
Econo Undercrown Milling	No
EN Plating	No
Engine	BMW S65B40
Engine Displacement	V8
Engine Stroke	2.961 in
Engine Type	ICE
Forging Type	FSR
Gas Distribution	No
Intake Angle	13
Intake Depth	.088 in
Intake Diameter	1.500 in
Lateral Gas Ports	No
Make	BMW
Mill Undercrown	No
Oil Groove Width	0.11100 in
Pin Fit	Yes
Piston Head Type	Dome
Piston Material	2618
Piston Quantity	4
Piston Series	JE Pistons
Piston To Wall Clearance	-0.003299 in
Piston Volume	12.80 cc
Product Market	European
Product Type	Engine Piston Kit
Skirt Coat	Yes
Smooth Crown Finish	No
Thermal Crown	No
Top Groove Width	0.04000 in
Tuff Skirt	No
Ultra Dome	No
Ultra Groove	No
Ultra Groove Plus Gas Port	No
Vertical Gas Ports	No
Wrist Pin Length	2.250 in
Wrist Pin Material	5115 Low Carbon Steel, Case Hardened
Wrist Pin Outer Diameter	0.827 in
Wrist Pin Wall Thickness	0.200 in

Warranty

30 Months

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.