JE Forged Piston Sets | Fits VW/Audi 1.8T 20V Engines

JE piston sets are drop-ship items; expect a 1-4 week lead time.

THE ULTIMATE 1.8T 20V RACE PISTON

Building a high-powered engine for road racing, drag racing, or full-out competition racing? JE Pistons for your 1.8T 20V engine offers ultimate strength and reliability in a forged piston for your VW/Audi race engine.

INCLUDED IN PISTON SETS

• 4X JE forged pistons
• 4X JE Pro Seal piston rings set
• 4X JE straight wall carbon steel wrist pins
• 8X JE wrist pin wire locks

9.25:1 COMPRESSION RATIO

After years of building countless 1.8T race, drag, and high-powered street engines, iE has determined the perfect “sweet spot” 9.25:1 compression ratio. This ratio allows higher boost levels with less chance of knock and cylinder detonation without sacrificing out-of-boost power or spool time and provides more power/torque per pound of boost than lower compression ratios. Speak with your engine tuner about the best fuel and boost pressures to use with your specific turbo and fueling setup for this compression ratio. 

CHOOSE YOUR BORE SIZE

JE offers you a choice of bore size to suit your build. You have the option of stock bore sizing (81mm) or up to +83mm oversized bores. Overbore pistons require additional machine work, including a cylinder bore and hone. A machine shop must perform this work. For most performance engine builds, we recommend overboring the engine block when installing aftermarket pistons. This additional work ensures a proper piston-to-wall clearance and, in most cases, results in stronger compression, longer piston life, increased ring life, and quieter piston operation.

MEASUREMENTS & SPECIFICATIONS

Stock bore size:
Bore: 81mm
Stroke: 86.4mm
Rod size: 144X20
Dome CC (9.25:1): -2.7
Weight (8.5:1): 296 grams
Weight (9.25:1): 299 grams

+1mm bore size:
Bore: 82mm
Stroke: 86.4mm
Rod size: 144X20
Dome CC (8.5:1): -9.3
Dome CC (9.25:1): -3.6
Weight (9.25:1): 308 grams

+2mm bore size:
Bore: 83mm
Stroke: 86.4mm
Rod size: 144X20
Dome CC (9.25:1): -6.5
Weight (8.5:1): 310 grams
Weight (9.25:1): 312 grams

OPTIONAL 180 “Tool Steel” WRIST PINS

JE 180 Tool Steel wrist pins are through-hardened 52100 high-carbon bearing steel for extreme forced induction or nitrous-fed racing applications and offer high-strength with low ductility. Employing the latest in technology, each pin is checked to ensure dimensional measurements and roundness. Recommended upgrade for all engines exceeding 125HP per cylinder. SOLD SEPARATELY

MANUFACTURING DETAILS

Forged from 2618 T6 aluminum
Engineered for extreme operating environments found in professional motorsport competition, JE manufactures this light yet strong piston from high tensile strength 2618 T6 aluminum. This high-performance alloy is suited for use with high compression ratios, high boost levels, and high octane usage, tolerating acceleration forces of more than 8000 Gs and directional changes exceeding 200 times a second while minimizing weight. This reliable forging is the ultra-high performance choice when building competition or very high powered boosted engine exceeding street power levels.

Optimized dish & dome design
The piston dish and dome have been individually designed to the combustion chamber of each individual application. Special care has been taken to provide properly placed valve reliefs as needed and feature smooth-flowing radii across the surface for excellent flame travel. Designed and verified in JE’s dedicated Critical Manufacturing Cell, providing reliable compression ratios and combustion characteristics.

JE Pro Seal piston rings
Every JE piston set includes a complete performance-matching JE Pro Seal Piston Rings set. JE Pro Seal rings are the result of over 60 years of experience in manufacturing racing piston technology such as NASCAR, ALMS, NHRA, and AMA. Pro Seal Ring features barrel-faced top rings made with premium ductile iron and plasma-moly inlays on the ring face, combining nickel, chrome, and other trace elements. The second ring sets are taper-faced with a reverse torsional design and finished with a phosphate coating. These high-technology designs reduce friction, lower wear, improve ring seal, and extend ring life.

World-class manufacturing and quality control
Meeting the extreme demands of today’s ultra-performing race teams, JE Pistons are engineered, manufactured, and verified using a Critical Process Program unique to JE. All critical surfaces are machined in a dedicated manufacturing cell resulting in tighter tolerances on 14 critical areas. 23-point quality inspection in an environmentally controlled lab maintained at a constant 68 degrees with 40% relative humidity. This ensures consistent and exact measurements and guarantees dimensional conformity. Each piston is serialized and tracked, so you can rest assured your piston set is ready to use right out of the box!

VEHICLE FITMENT

• Audi – A4 1996-2001 (B5 – B5.5) 1.8T 20V engines
• Audi – A4 2002-2005 (B6) 1.8T 20V engines
• Audi – A6 1998-2004 (C5) 1.8T 20V engines
• Audi – A6 Allroad 1998-2004 (C5) 1.8T 20V engines
• Audi – TT 2000-2006 (MK1 – 8N) 1.8T 20V engines
• Audi – A3 1996-2003 (MK1 – 8L) 1.8T 20V engines
• Audi – S3 1996-2003 (MK1 – 8L) 1.8T 20V engines
• VW – Golf 1999-2005 (MK4) 1.8T 20V engines
• VW – GTI 1999-2005 (MK4) 1.8T 20V engines
• VW – Jetta & Jetta GLI 1999-2005 (MK4) 1.8T 20V engines
• VW – Passat 1998-2005 (B5 – B5.5) 1.8T 20V engines
• VW – Beetle 1998-2011 (1C – 9C – 1Y) 1.8T 20V engines