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JE Pistons 274647 Piston Set, 2618, Dome, 3.937 Bore, 1.290 Cd, 0.905 Pin, Set Of 6.

(1984-1989 Porsche 911 Base/Carrera/Speedster)

Manufacturer

Part Number

274647
Sale Price

$1,499.99

Estimated ship date Saturday, November 14

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Product Details

JE Pistons 274647 is a high-performance forged piston set engineered specifically for air-cooled Porsche 911 engines with Nickel Ceramic bore. Precision-machined from 2618 aluminum alloy, these pistons deliver exceptional strength and durability under extreme operating conditions. The set includes 6 pistons featuring a dome crown design, 3.937-inch bore diameter, 1.290-inch compression distance, and 0.905-inch wrist pin.

Key Features:

  • Application-specific forgings with optimized, uniform crown thickness for improved heat distribution
  • Valve pockets machined to accommodate high lift camshafts while maintaining compatibility with stock stroke and rod length
  • Contact reduction groove minimizes frictional drag for increased efficiency
  • Accumulator groove enhances top ring stability and sealing performance
  • CNC-machined side relief with lower support band provides additional skirt strength
  • Precision CNC-machined ring grooves designed for OEM-style piston rings
  • Honed pin bores with double pressure-fed pin oilers for superior lubrication
  • Wire locks included for secure wrist pin retention
  • JE ProSeal piston rings included with each set

All JE Pistons are sold in precision-matched sets to ensure balanced performance and proper engine operation. These pistons are ideal for Porsche enthusiasts seeking reliable performance upgrades for their air-cooled 911 powerplants.

Products specifications

Fits

1984-1989 Porsche 911 Base/Carrera/Speedster

Bore

100mm

C/D

32.8mm

Comp Ratio

11.5:1

Dome CC

42.3

Gram Weight

496

Head CC

90

Oversize

5mm

Rod

127mm

Skirt Type

R

Stroke

74.4mm

Engine

PORSCHE AIRCOOLED 6 CYL

Add-On

905-073-MW

Piston Pin Wall Thickness

0.150

Piston Avg Wt

498

Oil Ring Thickness

0.119

Compression Height

1.290

Cylinder Head

3.2 Liter

Add-On

J660U1-3937

Piston Pin Outside Diameter

0.905

Top Compression Ring Thickness

0.0595

Piston Volume

42.3

Forging Type

Round

Piston Head Type

Dome

Product Market

Sport Compact

Second Compression Ring Thickness

0.07

Out of Stock Message

Call for Availability

Ringset Included

Yes

Add-On

905-2500-15-TSC

Industry

Automotive

Make

PORSCHE

Bore Diameter

100.00

Category Hierarchy

Pistons>Piston Kits

Piston Material

2618

Piston Pin Length

2.500

Prop 65

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

Piston Quantity

6

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