{"product_id":"empi-adjustable-irs-spring-plates-6-1-8-collar-1972-79-beetle-18-1075-0","title":"EMPI Adjustable IRS Spring Plates — 6-1\/8\" Collar, Pair | VW Beetle 1972–1979 (18-1075-0)","description":"\u003ch2\u003e\u003cb\u003eEMPI Adjustable IRS Spring Plates — 6-1\/8\" Collar (Pair)\u003c\/b\u003e\u003c\/h2\u003e\u003cp\u003eEMPI adjustable IRS spring plates with a \u003cb\u003e6-1\/8\" collar\u003c\/b\u003e — specifically tuned for \u003cb\u003e1972–1979 VW Beetle\u003c\/b\u003e IRS rear suspension using the \u003cb\u003e26-9\/16\" torsion bar\u003c\/b\u003e. They replace the factory spring plate assembly with a precision-machined adjustable plate that allows infinite rear ride-height adjustment. Sold as a pair. EMPI part #18-1075-0.\u003c\/p\u003e\u003cp\u003eThe spring plates connect the IRS torsion bars to the rear trailing arms. Where the factory setup is locked by spline engagement, these \u003cb\u003esingle-piece adjustable plates\u003c\/b\u003e include a built-in adjuster: loosen, change angle, retighten — rear ride height moves in continuous increments for show stance, autocross corner weights, or off-road travel.\u003c\/p\u003e\u003ch3\u003e\u003cb\u003eVehicle Fitment\u003c\/b\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eVW Beetle (Standard, IRS rear):\u003c\/b\u003e 1972–1979\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eVW Super Beetle (IRS rear):\u003c\/b\u003e 1972–1979 (verify your specific year)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eKarmann Ghia:\u003c\/b\u003e 1972–1974\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cb\u003eWhy Choose EMPI?\u003c\/b\u003e\u003c\/h3\u003e\u003cp\u003eEMPI tunes this single-piece adjustable plate to late-Beetle torsion housing geometry, delivering infinite rear ride-height control with correct torsion bar engagement instead of fixed spline positions.\u003c\/p\u003e\u003ch3\u003e\u003cb\u003eKey Features \u0026amp; Benefits\u003c\/b\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eYear-specific tuning:\u003c\/b\u003e Matched to 1972–1979 Beetle torsion housing geometry\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eInfinite adjustment:\u003c\/b\u003e Continuous ride-height change without spline clocking\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eVersatile:\u003c\/b\u003e Show stance, autocross corner weights, or off-road travel\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMatched pair:\u003c\/b\u003e Left and right supplied together\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cb\u003eTechnical Specifications\u003c\/b\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eCollar size:\u003c\/b\u003e 6-1\/8 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTorsion bar length:\u003c\/b\u003e 26-9\/16 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eApplication:\u003c\/b\u003e 1972–1979 Beetle IRS rear suspension\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAdjustment:\u003c\/b\u003e Continuous, infinite within range\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSold as:\u003c\/b\u003e Pair\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePart number:\u003c\/b\u003e 18-1075-0\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cb\u003eFrequently Asked Questions\u003c\/b\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eWhy are there two different 6-1\/8\" collar versions (this one and 17-2674-0)?\u003c\/b\u003e The collar size is the same, but VW changed spring plate geometry between the early IRS era (1968–1971) and the later IRS era (1972–1979). Each version is tuned for its specific application — the camber and toe characteristics differ. Match the part number to your specific year.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWill I need an alignment after installing?\u003c\/b\u003e Yes. Any change in rear ride height changes rear camber and toe. After installation and any height adjustment, get the car aligned.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCan I install these myself?\u003c\/b\u003e Moderately involved. Torsion housing has to be opened, plates swapped, torsion bars re-clocked, everything reassembled. Plan 2-4 hours for someone familiar with VW rear suspension. Less if you've done IRS rebuilds before.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eHow much ride height adjustment do I get?\u003c\/b\u003e Continuous adjustment within the mechanical range — typically enough for 2-4\" of vertical adjustment, more if combined with torsion bar re-clocking.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWill they work on a Super Beetle?\u003c\/b\u003e Late Super Beetles use IRS rear with similar geometry to Standard Beetle. Verify your specific year and chassis before ordering — for unusual builds, send dimensions and we'll confirm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAre these street legal?\u003c\/b\u003e Yes, in any reasonable ride-height setting. Some extreme adjustment positions may put alignment outside factory spec — keep alignment within reasonable bounds for safe street use.\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr\u003e\u003ch3\u003e\u003cb\u003eExplore Related Categories\u003c\/b\u003e\u003c\/h3\u003e\u003cp\u003eShop more parts for your build: \u003ca href=\"\/collections\/vw-beetle\"\u003eVW Beetle\u003c\/a\u003e \u003ca href=\"\/collections\/vw-super-beetle\"\u003eVW Super Beetle\u003c\/a\u003e \u003ca href=\"\/collections\/suspension\"\u003eSuspension\u003c\/a\u003e\u003c\/p\u003e","brand":"EMPI","offers":[{"title":"Default Title","offer_id":44899675406451,"sku":"18-1075-0","price":196.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0278\/2760\/1523\/files\/18-1075-0-500x376.jpg?v=1777274103","url":"https:\/\/www.washburnsmetal.com\/products\/empi-adjustable-irs-spring-plates-6-1-8-collar-1972-79-beetle-18-1075-0","provider":"Washburn's Metal","version":"1.0","type":"link"}