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JE Pistons 261663 Forged Piston Set Bore Dome Alloy - 3.543 2618 6-Cylinder

(1974-1977 Porsche 911 Base/Carrera/S)

Manufacturer

Part Number

261663
Sale Price

$1,524.99

Estimated ship date Sunday, November 15

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Product Details

JE Pistons 261663 is a high-performance forged piston set engineered specifically for air-cooled Porsche 911 engines with Nickel Ceramic bore surfaces. Machined from premium 2618 aluminum alloy, these pistons deliver exceptional strength and durability under high-stress racing and performance applications. The dome-style pistons feature a 3.543-inch bore diameter, 1.335-inch compression distance, and 0.866-inch wrist pin diameter, designed to work with stock stroke and rod length configurations.

Key Features:

  • Application-specific forgings with optimized, uniform crown thickness for maximum strength-to-weight ratio
  • Contact reduction groove minimizes frictional drag and improves efficiency
  • Accumulator groove increases top ring stability and sealing performance
  • CNC-machined side relief with lower support band provides additional skirt strength
  • Precision CNC-machined ring grooves accept OEM-style piston rings
  • Valve pockets machined to accommodate high-lift camshafts
  • Honed pin bores with double pressure-fed pin oilers for enhanced lubrication
  • Wire locks included for secure pin retention

Each set includes six matched pistons and JE ProSeal piston rings. JE Pistons are manufactured to exacting tolerances and sold as balanced, matched sets to ensure smooth operation and optimal performance. Note: Not compatible with 2.7L applications.

Products specifications

Fits

1974-1977 Porsche 911 Base/Carrera/S

Bore

90mm

C/D

34mm

Comp Ratio

9.5:1

Dome CC

21.8

Gram Weight

404

Head CC

68

Oversize

STD

Rod

127.8mm

Skirt Type

R

Stroke

70.4mm

Piston Pin Outside Diameter

0.866

Make

PORSCHE

Bore Diameter

90.00

Industry

Automotive

Add-On

JG1001-3543

Piston Avg Wt

404

Piston Pin Material

9310

Add-On

866-2500-15-93C

Piston Head Type

Dome

Piston Pin Wall Thickness

0.150

Engine

PORSCHE AIRCOOLED 6 CYL

Cylinder Head

2.7 Liter

Category Hierarchy

Pistons>Piston Kits

Out of Stock Message

Call for Availability

Oil Ring Thickness

0.111

Top Compression Ring Thickness

0.04

Product Market

Sport Compact

Piston Pin Length

2.500

Piston Material

2618

Forging Type

Round

Add-On

866-063-MW

Ringset Included

Yes

Compression Height

1.335

Piston Volume

21.75

Second Compression Ring Thickness

0.048

Piston Quantity

6

Prop 65

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

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