The Blower Shop Forward Carburettor Spacer is built out of the same aircraft grade aluminium as our industry-leading roots superchargers. Polished to a mirror-like finish, they not only match our line of show quality polished blowers but they complete the seamless transition between the Carburettors and the supercharger. TBS Forward Carburettor Spacers are made from 6061 billet aluminium that is O-ringed on both sides so no gaskets or messy silicone has to be used. Specifically engineered to ram the air/fuel into your blower system resulting in more horsepower and higher air/fuel volume. Designed to push the carbs forward and change how the air and fuel mix. Get the most efficiency possible on your Supercharger. It goes 2" up and 2" forward.