Description Genuine Weber Performance kit for the Porsche 356 and 912 replaceing Zenith Comprising of authentic 44 IDF Weber carburettors and the finest quality inlet manifold / fittings. kit contains 2 x Authentic Spanish Weber 44IDF carburettors 2 x manifolds and fittings 2 x Top quality air filters This will work really well on a stock engine, but we always recommend that, to achieve maximum power, driveability and efficiency, you have the carburettors professionally set up on a rolling road. *This manifold is cast with internal ports of 40mm – Please note that for optimum performance it is recommended that the manifold is port matched to suit the carburettors American reference K290XE-44 JDA-PPO202-44