This cog belt drive will only fit on Magnuson TVS 1900 and TVS 2300 superchargers that have the jackshaft drive with two rear pulleys. This kit is 1:1 ratio, so it doesn’t increase boost psi. It’s intended to prevent belt slip while adding a louder blower whine sound that many enjoy. It’s loud at full throttle. This kit was lightly used, under 1K miles. Pulleys fit included 30mm wide cog belt, each pulley is 30 teeth. You may need slightly longer M6 bolts to replace the 8 bolts on your standard pulleys, hardware not included. Camaro LS3 L99 Corvette LS2 LS3 LS7 GTO LS2 Pontiac G8
