These collars insert into a standard exhaust on all aircooled VW Beetles, Karmann Ghia`s, Splitscreen and Baywindow Campervans with 1200cc, 1300cc, 1500cc or 1600cc engines. Once installed it allows you to fit the airhose from the fanhouse to the exhaust pod which transfers the air into the heat exchanger. With the large clamps that attach the underside of the exhaust pod to the heat exchanger
