Mahle Forged Piston & Cylinder Set — 87mm × 69mm Stroke, 1641cc | VW Type 1 Air-Cooled (98-1987-B)

Mahle Forged Piston & Cylinder Set — 87mm × 69mm Stroke, 1641cc | VW Type 1 Air-Cooled (98-1987-B)The 1641cc big bore is a favorite budget power adder for the Type 1, and this Mahle forged 87mm 69mm set (98 1987 B) is the forged piston version the upgrade for any 1641 build where heat or detonation would crack a cast slug. Features 87mm bore 69mm stroke = 1641cc displacement Mahle forged pistons forged, not cast, for strength under heat, boost, and nitrous Complete set of 4: cylinders, pistons, rings, wrist pins, and clips Runs the stock 69mm

The 1641cc big-bore is a favorite budget power-adder for the Type 1, and this Mahle forged 87mm × 69mm set (98-1987-B) is the forged-piston version — the upgrade for any 1641 build where heat or detonation would crack a cast slug.

Features

• 87mm bore × 69mm stroke = 1641cc displacement
• Mahle forged pistons — forged, not cast, for strength under heat, boost, and nitrous
• Complete set of 4: cylinders, pistons, rings, wrist pins, and clips
• Runs the stock 69mm crank.

Fitment

CONFIRMED: VW Type 1 air-cooled — Beetle, Super Beetle, Karmann Ghia, Bus (Type 2), Type 3 (Squareback, Fastback, Notchback). Slip-in on a standard case machined for this bore — no special case work required. NOT CONFIRMED: Type 4 / 914 engines (different bore spacing and case).

Specifications

• Bore: 87mm | Stroke: 69mm | Displacement: 1641cc
• Piston: Mahle forged aluminum alloy
• Cylinder: cast iron
• Sold as: complete set of 4 (includes rings, pins, clips)
• Brand: Mahle | Part Number: 98-1987-B | UPC: 707924433876

Questions & Answers

Does this fit my air-cooled VW Type 1? Yes — Beetle, Super Beetle, Karmann Ghia, Bus (Type 2), and Type 3, with the case machined for this bore where required.

Are these forged or cast pistons? Forged — Mahle forged pistons, for high-output street, race, and off-road use.

Do I need a stroker crank? No — it runs the stock 69mm crank.

What's included? A complete set for one engine: 4 cylinders, 4 pistons, rings, wrist pins, and clips.

What's the part number? Mahle 98-1987-B (UPC 707924433876).

Is Washburn's Metal an authorized dealer? Yes — Washburn's Metal is an authorized EMPI dealer.

Prop 65 Warning

WARNING: This product can expose you to chemicals known to the State of California to cause cancer and reproductive harm. For more information, go to www.P65Warnings.ca.gov. All parts legal for use on pre-pollution-controlled vehicles only.