Please wait… 
Please wait while we process your order,
do not press the back button… 
Design 911 Design 911 supply Porsche parts, Porsche spares and Porsche accessories, to both retail and to the trade. Our Porsche product and accessory range includes brakes, exhausts, tyres, wheels and Porsche panels and interiors. https://d911api.datadial.net/images/schemaLogo.png https://d911api.datadial.net/images/schemaLogo.png +443456003478 https://d911api.datadial.net Facebook Instagram
Porsche specialists based in the UK
Porsche > 997 (911) MK1 2005-2008 > Engine Rebuild Parts > Engine Cylinders / Liners / Pistons >

JE Pistons

JE Pistons

Refine by Car Type
DISPLAYING 1 to 1 (of 1 products)
JE Piston Set. Porsche 996 turbo / 997 turbo 3.6L (9.4:1) - 99610313174, 99610391574 - JE-362143
4
JE Piston Set. Porsche 996 turbo / 997 turbo 3.6L (9.4:1)
362143
Product Information
Product Information
JE piston - Set of 6

Forged from 2618 Aluminium Alloy

jepiston

Fits: 
Porsche 996 3.6L Turbo M96.70
Porsche 996 3.6L GT2 M96.70
Porsche 997 3.6L Turbo M97.70

Piston Material: 2618
Forged Bore: 3.937 (100.0mm)
Oversize: STD
Stroke: 76.4mm
Rod length: 5.0" (127.0mm)
Dome CC's: -.25.5
Comp Dist: 1.303" (33.1mm)
C/R: 9.4:1
Ring package designed for: 0.97, 1.2, 2.0mm
Piston Avg Weight: 430 grams

Designed for 911 engines compatible with a Nickel Ceramic bore, these pistons are machined from forged 2618 alloy for greater strength. The valve pockets are machined to accommodate high lift cams, and accept the stock stroke and rod length. The ring grooves are precision CNC machined and all new applications include skirt coating and 3D undercrown milling. Piston clearances designed for aluminium cylinders, steel/iron cylinders may require additional clearance.

2618 Aluminium Alloy
Pistons manufactured from 2618 wrought aluminium alloy are designed for racing and very demanding applications. These environments necessitate the higher strength 2618 aluminium alloy. When exposed to heat, 2618 aluminium alloy expands 15% more than 4032 aluminium alloy therefore the initial piston to cylinder wall needs to be 15% greater. This difference is most noticeable during cold start. When running at operating temperature both 2618 and 4032 pistons have approximately the same clearances.  

Includes:
• Accumulator Grooves
• Skirt Coating
• 3D Lightweight Undercrown Milling
• Pin fitting and wire locks
• 9310 high carbon alloy or tool steel wrist pins
• Rings Included

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

362143
99610313174
99610391574

The product you are viewing cross references to these numbers
DISPLAYING 1 to 1 (of 1 products)
About JE Pistons

JE Pistons for High-Output, High-Strength & Precision-Built Porsche Engine Rebuilds

JE Pistons are engineered for engines that need uncompromising strength, exceptional reliability and maximum performance. Manufactured from forged aluminium using motorsport-grade techniques, JE components deliver superior durability under extreme cylinder pressures, high RPM loads and elevated combustion temperatures. These pistons are a top choice for performance road builds, turbocharged applications, high-compression setups and competition-focused Porsche engines.

Whether you’re building a reliable street performer or a full racing engine, JE Pistons provide the toughness, stability and precision needed to extract the best from your powerplant.

What JE Pistons Do

JE Pistons enhance engine performance and durability by:

  • Providing exceptional structural strength for boosted or high-RPM operation
  • Reducing reciprocating mass for improved throttle response
  • Increasing combustion efficiency with advanced crown and skirt designs
  • Offering superior heat resistance under extreme load
  • Maintaining consistent sealing with precision-machined ring grooves
  • Reducing friction, improving smoothness and efficiency
  • Supporting aggressive tuning without sacrificing reliability

These pistons are engineered to handle the demands that standard cast pistons cannot tolerate.

Why Pistons Commonly Fail

Internal combustion engines place enormous stress on pistons—especially in modified or aging powerplants. Common piston failures include:

  • Detonation and pre-ignition, damaging crowns and ring lands
  • Oil starvation, leading to scuffing, seizure or skirt collapse
  • Thermal overload, often in turbo or track environments
  • Material fatigue from high mileage or frequent high-rev use
  • Incorrect tuning, creating lean conditions and excessive heat
  • Excessive boost pressure, overwhelming cast pistons
  • Protective coating wear, causing friction and heat issues

Symptoms include smoke, low compression, knocking noises, oil consumption and visible piston scoring.

Why You Should Replace Old Pistons with JE Forged Components

Upgrading to precision-engineered JE forged pistons—designed to surpass original performance and durability levels—provides major benefits for any serious rebuild.

Key advantages include:

  • Superior strength under extreme boost or high RPM
  • Improved compression retention and sealing efficiency
  • Reduced risk of piston failure in racing or track conditions
  • Enhanced power delivery with optimised combustion characteristics
  • Longer lifespan thanks to premium-grade forging materials
  • Smoother, more responsive engine performance
  • Confidence when running aggressive tunes, high compression or forced induction

JE Pistons are an essential upgrade for builders targeting motorsport-grade reliability.

You may also like
Popular Models