{"product_id":"mahle-forged-piston-cylinder-set-90-5mm-69mm-stroke-1776cc-vw-type-1-air-cooled-98-1990-b","title":"Mahle Forged Piston \u0026 Cylinder Set | VW Type 1 Air-Cooled | 90.5mm × 69mm 1776cc (98-1990-B)","description":"\u003ch2\u003e\u003cb\u003eMahle Forged Piston \u0026amp; Cylinder Set — 90.5mm × 69mm Stroke, 1776cc | VW Type 1 Air-Cooled (98-1990-B)\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003e1776cc is the most popular street displacement in the air-cooled world, and this Mahle forged 90.5mm × 69mm set (98-1990-B) is the forged upgrade — the slip-in big-bore that handles serious power without the failure risk of cast pistons.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eVehicle Fitment\u003c\/b\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eVW Beetle:\u003c\/b\u003e All years, air-cooled Type 1 engine.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eVW Super Beetle:\u003c\/b\u003e All years, air-cooled Type 1 engine.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eVW Karmann Ghia:\u003c\/b\u003e All years, air-cooled Type 1 engine.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eVW Bus (Type 2):\u003c\/b\u003e All years, air-cooled Type 1 engine.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eVW Type 3 (Squareback, Fastback, Notchback):\u003c\/b\u003e All years, air-cooled Type 1 engine.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eWhy Choose Mahle?\u003c\/b\u003e\u003c\/h3\u003e\u003cp\u003eMahle forged pistons are forged, not cast, for strength under heat, boost, and nitrous — built for high-output street, race, and off-road use.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eKey Features \u0026amp; Benefits\u003c\/b\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eDisplacement:\u003c\/b\u003e 90.5mm bore × 69mm stroke = 1776cc displacement\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eForged pistons:\u003c\/b\u003e Mahle forged pistons — forged, not cast, for strength under heat, boost, and nitrous\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eThick cylinder walls:\u003c\/b\u003e extra-thick cylinder walls for added strength and cooling surface\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eComplete set of 4:\u003c\/b\u003e cylinders, forged pistons, rings, wrist pins, and clips\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCrank:\u003c\/b\u003e Runs the stock 69mm crank\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eTechnical Specifications\u003c\/b\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eBore:\u003c\/b\u003e 90.5mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eStroke:\u003c\/b\u003e 69mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDisplacement:\u003c\/b\u003e 1776cc\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePiston:\u003c\/b\u003e Mahle forged aluminum alloy\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCylinder:\u003c\/b\u003e Cast iron, extra-thick wall\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSold as:\u003c\/b\u003e Complete set of 4 (includes rings, pins, clips)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBrand:\u003c\/b\u003e Mahle (distributed by EMPI)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePart Number:\u003c\/b\u003e 98-1990-B\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eUPC:\u003c\/b\u003e 707924371482\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eFrequently Asked Questions\u003c\/b\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eDoes this fit my air-cooled VW Type 1?\u003c\/b\u003e Yes — it fits Beetle, Super Beetle, Karmann Ghia, Bus (Type 2), and Type 3 engines once the case (and heads, where required) are machined for this bore.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAre these forged or cast pistons?\u003c\/b\u003e Forged — Mahle forged pistons, built for high-output street, race, and off-road use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDo I need a stroker crank?\u003c\/b\u003e No — it runs the stock 69mm crank.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWhat's included?\u003c\/b\u003e A complete set for one engine: 4 cylinders, 4 forged pistons, rings, wrist pins, and clips.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWhat's the part number?\u003c\/b\u003e 98-1990-B (UPC 707924371482).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eInstallation\u003c\/b\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSlip-in on a case already machined for 90.5\/92mm. No 94mm head work required.\u003c\/li\u003e\n\u003cli\u003eFor best results, use Teflon\/poly piston-pin retainer buttons.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\u003ch3\u003e\u003cb\u003eExplore Related Categories\u003c\/b\u003e\u003c\/h3\u003e\u003cp\u003e\u003ca href=\"\/collections\/engine-parts\"\u003eEngine Parts\u003c\/a\u003e, \u003ca href=\"\/collections\/all-vw-aircooled\"\u003eAll VW Air-Cooled\u003c\/a\u003e, \u003ca href=\"\/collections\/mahle\"\u003eMahle\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWARNING:\u003c\/strong\u003e 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.\u003c\/p\u003e","brand":"Mahle","offers":[{"title":"Default Title","offer_id":45118627807347,"sku":"98-1990-B","price":1076.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0278\/2760\/1523\/files\/98-1990-B-scaled_6f0e272e-c7f4-4a40-927b-e8918e5e2068.jpg?v=1782414077","url":"https:\/\/www.washburnsmetal.com\/products\/mahle-forged-piston-cylinder-set-90-5mm-69mm-stroke-1776cc-vw-type-1-air-cooled-98-1990-b","provider":"Washburn's Metal","version":"1.0","type":"link"}