JE Pistons 186236 Forged Piston Kit 83mm 9.0:1 for VW 2.8L 12V VR6 Golf Jetta

Vehicle Fitment

• 1991-1993 Volkswagen Passat B3 (VR6 2.8L 12V, Engine Code: AAA, FWD)
• 1992-1995 Volkswagen Corrado (SLC VR6 2.8L 12V, Engine Code: AAA, FWD)
• 1993-1999 Volkswagen Golf III / GTI (VR6 2.8L 12V, Engine Code: AAA, FWD)
• 1993-1999 Volkswagen Jetta III / GLX (VR6 2.8L 12V, Engine Code: AAA, FWD)
• 1993-1997 Volkswagen Passat B4 (VR6 2.8L/2.9L 12V, Engine Codes: AAA / ABV, FWD / Syncro AWD)
• 1999-2002 Volkswagen Golf IV / GTI (VR6 2.8L 12V, Engine Code: AFP, FWD)
• 1999-2003 Volkswagen Jetta IV / GLX (VR6 2.8L 12V, Engine Code: AFP, FWD)

Fitment Notes

• Fits all VW 12V VR6 engine codes sharing the 81mm stock bore with 90.2mm stroke: AAA (2.8L), ABV (2.9L), and AFP (2.8L MK4).
• This is an oversize piston at 83.00 mm (+2.00 mm over stock). Professional cylinder boring and honing to the correct piston-to-wall clearance is mandatory prior to installation.
• Does not fit the 24V VR6 engines (engine codes AQP, AUE, BDF, BHE, etc.).
• Does not fit the 3.2L VR6 (engine code BFH, BMJ, BUB, etc.) used in the Golf R32 and Audi TT.
• 9.0:1 compression ratio is recommended for forced induction (turbocharged or supercharged) builds. For naturally aspirated builds, JE's 10.0:1 option is recommended.
• Compression ratio calculated using a 0.040 in. head gasket. Actual ratio will vary with different gasket thickness.

Features

• Forged from 2618 T6 high-tensile aluminum alloy, engineered to withstand the extreme cylinder pressures of high-boost forced induction and heavy nitrous applications in the 12V VR6.
• Proprietary Forged Side Relief (FSR) forging technology reduces skirt mass and friction on the minor thrust side while maintaining structural rigidity on the major thrust side for maximum durability.
• Dome/dish crown geometry designed specifically for the 12V VR6 combustion chamber, featuring smooth-flowing radii for optimal flame travel and combustion efficiency - requires no deburring or preparation before installation.
• Floating wrist pin design (20 mm diameter) with included wire-lock retainers reduces side loading on pin bosses and allows smooth pin articulation through the full RPM range.
• Straight-wall carbon steel wrist pin provides superior strength and wear resistance under the high-load cycles of boosted VR6 applications.
• Engineered to withstand acceleration forces exceeding 8,000 G's and directional changes of more than 200 times per second, per JE's design standards for competition-level durability.
• Application-specific forging geometry minimizes reciprocating mass, improving throttle response and reducing wear on the rotating assembly.
• JE ProSeal premium ring set included - matched to 1.0 x 1.2 x 2.8 mm ring groove dimensions for optimal sealing and long service life from day one.
• Engineered, forged, and fully CNC-machined 100% in the USA to exacting tolerances for consistent fit across all six cylinders.

Specifications

• Part Number: 186236
• Engine Application: Volkswagen 2.8L / 2.9L 12V VR6 (AAA, ABV, AFP)
• Bore Diameter: 3.268 in. (83.00 mm) - +2.00 mm Oversize
• Compression Ratio: 9.00:1 (with 0.040 in. head gasket)
• Piston Head Type: Dome / Dish
• Dish Volume: -11.50 cc
• Compression Height (CD): 1.275 in. (32.39 mm)
• Stroke: 90.2 mm
• Connecting Rod Length: 164 mm
• Wrist Pin Diameter: 0.787 in. (20 mm)
• Wrist Pin Length: 2.250 in.
• Wrist Pin Style: Floating, Straight Wall, Carbon Steel
• Retainer Lock Style: Wire Lock
• Top Compression Ring Thickness: 1.0 mm
• Second Compression Ring Thickness: 1.2 mm
• Oil Ring Thickness: 2.8 mm
• Ring Set Part Number: JG1006-3268 (JE ProSeal)
• Piston Average Weight: 306 g
• Piston Material: 2618 Forged Aluminum Alloy
• Forging Type: FSR (Forged Side Relief)
• Cylinder Count (this SKU): 6 (Complete Set)
• Manufacturing Origin: 100% USA

Included Components

• 6x JE Forged 2618 FSR Aluminum Pistons (83.00 mm Bore)
• 6x Wrist Pins (20 mm, Straight Wall Carbon Steel)
• 6x Sets of Wire Lock Wrist Pin Retainers
• 1x JE ProSeal Premium Ring Set - 6-Cylinder (JG1006-3268)

Product Description

The JE Pistons 186236 is a complete six-cylinder forged piston kit engineered specifically for all Volkswagen 12V VR6 engines sharing the AAA, ABV, and AFP engine codes, covering the Corrado, Golf III/IV, Jetta III/IV, and Passat B3/B4. Machined to an oversize bore of 83.00 mm (+2.00 mm over stock), this kit is purpose-built for VR6 engine rebuilds that require cylinder boring beyond the stock 81mm dimension. Constructed from 2618 T6 forged aluminum using JE's Forged Side Relief (FSR) technology, these pistons deliver the strength and thermal stability needed for high-boost turbocharged builds, while the 9.0:1 compression ratio provides the headroom required for elevated cylinder pressures without risk of detonation on pump fuel.

The dome/dish crown design (-11.50 cc volume) achieves a 9.0:1 compression ratio with a standard 0.040 in. head gasket, making this kit the preferred choice for builders planning forced induction upgrades. Smooth-flowing radii across the crown surface promote efficient flame travel throughout the 12V VR6 combustion chamber, and the crown requires no deburring or preparation out of the box. The floating 20 mm carbon steel wrist pin and included wire-lock retainers ensure smooth pin operation and secure retention throughout the full RPM range. The included JE ProSeal ring set (JG1006-3268) is matched precisely to the piston's 1.0 x 1.2 x 2.8 mm ring groove dimensions for reliable sealing from the first start.

This kit covers the complete North American and European 12V VR6 family across MK3 and MK4 platforms, from the early Passat B3 through the final MK4 Jetta and Golf AFP applications. It does not fit any 24V VR6 variant or the later 3.2L VR6 engine. For naturally aspirated builds where higher compression is preferred, JE also offers this application in a 10.0:1 compression ratio. Professional cylinder boring and honing to the correct piston-to-wall clearance is required prior to installation in all cases.