The Solex PDSIT series of down-draft, dual-throat carburetors was used primarily on air-cooled Volkswagen flat-four engines. They typically came factory-installed in dual-carburetor setups (one left and one right unit) on the following models:
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Volkswagen Type 3 (Fastback, Squareback, Notchback) – 1964 to 1967 (using variants like the 32/34 PDSIT)
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Volkswagen Type 2 (Bay Window Bus / Transporter) – 1972 to 1974 with the 1.7L and 2.0L Type 4 engines (using 32/34 PDSIT-2 and PDSIT-3 variants)
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Volkswagen Type 4 (VW 411 / 412) – 1969 to 1974
Depending on the specific year and displacement, common variations include the 32 PDSIT, 34 PDSIT, and paired 32/34 PDSIT setups.
