Heat Riser Tubes, for VW Intake Manifolds

EMPI Heat Riser Tubes for VW Intake Manifolds (00-3232-7)

Vehicle Fitment and Compatibility

These EMPI replacement heat riser tubes are specifically designed to fit the 1017 Cast Aluminum Intake Manifold commonly used on air-cooled Volkswagen engines. They are compatible with VW Type 1 Beetle, Karmann Ghia, and Type 2 Bus models utilizing a single carburetor setup. While precision-engineered for the 1017 manifold, these tubes can often be adapted to work with other aftermarket or custom VW intake manifolds requiring external heat riser plumbing.

Pro Tech Tips for Installation and Performance

Prevent Carburetor Icing: Heat riser tubes are not just for show; they are vital for drivability in cold or humid climates. By routing hot exhaust gases to the base of the intake manifold, they prevent fuel from condensing and freezing inside the runners. If your VW stumbles or stalls during the first ten minutes of driving, ensuring these tubes are hot to the touch is your first diagnostic step.

Verify Flow During Maintenance: It is common for heat riser tubes to become "coked" or blocked with carbon deposits over several years of use. Whenever you have the intake system apart, verify that air can flow freely through the tubes. If they are clogged, the intake manifold will remain cold, leading to poor fuel atomization and decreased gas mileage.

Achieve a Proper Exhaust Seal: When installing these tubes, ensure the mounting flanges are perfectly flat and use fresh gaskets. Even a small exhaust leak at the heat riser connection can cause an audible "ticking" sound and allow soot to build up in the engine bay. For the best seal, hand-tighten all hardware to align the tubes before performing the final torque-down.