Weber VW Manifold Kit - Progressive - Fits Type 1 & 2

The New VW Progessive Intake Manifold will fit all Type 1 based Dual Port 1600cc and larger engines using stock heads and includes heat risers. The carburetor base flange will accept Weber and EMPI dual barrel progressive style carburetors. The kit includes hardware, gaskets and intake manifold boots with clamps. The heat riser tubes are not attached to the manifold. They insert into tubes underneath the manifold at either side and attach to the heat riser ports on the exhaust. EMPI redesigned the manifold a few years back to try and appease those that did not like running the steel brace. The new version of the intake manifold has a stock style mount at the bottom to bolt the the case stud.

Unfortunately with the redesign came some oversights and due to manufacturing variances and the supplier wanting to either fit all possible stroker engine combinations, or simply not checking the reproduction manifold on a stock engine, the tubes on the intakes manifold and the heat riser will have to be trimmed, and the aluminum casting will have to be cut back prior to installation. Further, the heat riser hole in the manifold is not drilled all the way through so if you want the heat risers to operate properly, the manifold will have to be drilled from side to side to open up the passage.

Trimming Recommendations:
48mm (1 7/8") off the 3-4 (left) side intake tube
48mm (1 7/8") off the 3-4 (left) side heat riser tube
30mm (1 1/8") off the 3-4 (left) intake manifold heat riser base

We whole heartedly wish this wasn't the case but until the supplier runs through their incorrect stock or demands a better product, this is what is available to the industry. We are working as hard as possible to find another solution but for now trimming is required. We use a pipe cutter (the intake tube is 1 3/8" diameter) for the cleanest cut on the tubes, but you can use a sawzall, hack saw, cut off wheel, etc.

Whereever you source your intake manifold, make sure you check the fitment! The cross tube from end casting to end casting should be measure roughly 16.75" to 17.75" across. The variation being that the intake manifold can and should slightly enter into each end casting.