Jaguar & Land Rover Superchargers. 7.5% Reduction in Diameter. (our competitor calls this 12%Boost). Gives approximately 1.5 psi additional boost! Typical Gains of 25 – 30 HP. MODIFICATIONS to the blower housing may be required for installation for pulley clearance. The pulley is not typically centered on the end of the housing so some material must be removed from one side of the housing. We do this by hand with a 2 disc sander on a air tool. Requires a Hydraulic Press! These are Press On pulleys, recommend you remove snout from vehicle and replace the isolator and the bearings at the same time. Quality Superchargers has rebuilt snouts in stock with performance pulleys installed! Made from 1144 Stress Proof Steel. Eaton uses steel pulleys on all their Superchargers! The item “Supercharger Performance Pulley 12% Boost Jaguar Land Rover 5.0 3.0 Range” is in sale since Tuesday, June 6, 2017. This item is in the category “eBay Motors\Parts & Accessories\Car & Truck Parts\Turbos, Nitrous, Superchargers\Superchargers & Parts”. The seller is “qualitysuperchargers” and is located in Mercer, Pennsylvania. This item can be shipped worldwide.