{"product_id":"billet-aluminum-solex-to-weber-carburetor-adapter-plates-porsche-356-super-90-sc-912","title":"Billet Aluminum Solex-to-Weber Carburetor Adapter Plates | Porsche 356 Super 90\/SC \u0026 912 | Pair","description":"\u003ch2\u003e\u003cb\u003eBillet Aluminum Solex-to-Weber Carburetor Adapter Plates — Porsche 356 Super 90, SC \u0026amp; 912 (Pair)\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003ePrecision-machined \u003cb\u003ebillet aluminum carburetor adapter plates\u003c\/b\u003e for converting Porsche 356 Super 90, SC, and 912 engines from the original \u003cb\u003eSolex\u003c\/b\u003e carburetors to \u003cb\u003eWeber IDF or DCNF\u003c\/b\u003e carburetors. Sold as a pair (one per side) and made by Washburn's Metal.\u003c\/p\u003e\n\u003cp\u003eThe original Solex 40 PII-4 carburetors on these engines are notoriously difficult to keep in tune, parts availability is poor, and even a rebuilt set tends to drift out of sync within a few hundred miles. Many owners move to Weber 40 IDF or 44 IDF carburetors because they're easier to tune and better supported. The catch: the Weber bolt pattern doesn't match the Solex flange on the factory Porsche manifold. These plates bridge that gap — \u003cb\u003eWeber pattern on top, Solex pattern on the bottom\u003c\/b\u003e — so you keep your original manifolds and add Webers without permanent modification.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eVehicle Fitment\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003ePorsche 356 Super 90:\u003c\/b\u003e 1959–1963 — Solex 40 PII-4 carburetor manifold\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePorsche 356 SC:\u003c\/b\u003e 1964–1965 — Solex 40 PII-4 carburetor manifold\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePorsche 912:\u003c\/b\u003e 1965–1969 — Solex 40 PII-4 carburetor manifold\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOther applications\u003c\/b\u003e using the same Solex flange-to-Weber conversion\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eImportant:\u003c\/b\u003e These adapters work with the original Porsche Solex-pattern intake manifolds. If your manifolds have been replaced with Weber-direct manifolds, you don't need these adapters. Confirm your manifold flange pattern before ordering.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eKey Features \u0026amp; Benefits\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eKeep Your Manifolds:\u003c\/b\u003e Bolt modern Weber carburetors to your original Porsche Solex-pattern manifolds without permanent modification.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFully Reversible:\u003c\/b\u003e Manifolds aren't cut or modified — return to factory Solex configuration anytime.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eStandard Weber Pattern:\u003c\/b\u003e Accepts the common IDF\/DCNF flange, including 40 IDF and 44 IDF carburetors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSold as a Pair:\u003c\/b\u003e One plate per carburetor.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eTechnical Specifications\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eMaterial:\u003c\/b\u003e Billet aluminum\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFinish:\u003c\/b\u003e Machined\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eConfiguration:\u003c\/b\u003e Solex flange (bottom) to Weber flange (top)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSold As:\u003c\/b\u003e Pair (one per carburetor)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eManufacturer:\u003c\/b\u003e Washburn's Metal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eFrequently Asked Questions\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eWhich Weber carburetor do these adapt to — IDF or DCNF?\u003c\/b\u003e The Weber flange pattern is the standard IDF\/DCNF pattern used across the Weber sidedraft and downdraft line. Both 40 IDF and 44 IDF Webers bolt up. Contact us if you're running a less common Weber variant.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDo I need new linkage and air cleaners?\u003c\/b\u003e Yes. Solex-to-Weber conversion is a complete carburetion swap. You'll need Weber-specific linkage (typically a hex-bar style), Weber air cleaners, and matching jets\/venturis for your engine's displacement and state of tune.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWill this reduce performance compared to properly-rebuilt Solex carbs?\u003c\/b\u003e No. A well-tuned Weber setup will match or exceed a properly-rebuilt Solex setup in driveability and reliability. The main downside is loss of originality — for a numbers-matching show car, keeping the Solex carbs is the more correct choice.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAre these reversible?\u003c\/b\u003e Yes. The conversion is fully reversible — your original Porsche manifolds aren't modified, just adapted. Save your original Solex carbs and you can go back to factory configuration anytime.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDo they include gaskets?\u003c\/b\u003e Contact us to confirm — gaskets vary by application and we typically supply or recommend the correct gasket sets based on your specific carburetor choice.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWill they fit a 356A or 356B with the smaller Solex 32 carbs?\u003c\/b\u003e No. These are sized for the larger 40 PII-4 manifolds used on Super 90, SC, and 912. The smaller-engine 356A\/B uses a different manifold flange.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cb\u003eExplore Related Categories\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eBuilding out your Porsche carburetion? Browse \u003ca href=\"\/collections\/fuel-intake\"\u003eFuel \u0026amp; Intake\u003c\/a\u003e, \u003ca href=\"\/collections\/porsche-356\"\u003ePorsche 356\u003c\/a\u003e, and \u003ca href=\"\/collections\/all-porsche\"\u003eAll Porsche\u003c\/a\u003e.\u003c\/p\u003e","brand":"Washburn's Metal","offers":[{"title":"Default Title","offer_id":44282836189299,"sku":null,"price":75.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0278\/2760\/1523\/files\/20250904_163516A.jpg?v=1770521370","url":"https:\/\/www.washburnsmetal.com\/products\/billet-aluminum-solex-to-weber-carburetor-adapter-plates-porsche-356-super-90-sc-912","provider":"Washburn's Metal","version":"1.0","type":"link"}