These upgrades have been fitted now to many cars and discussion on forums and bar stools usually refer to about a 40bhp/ftlb gain from this size of pulley modification. That is true for the midrange gain, though the Eaton M112 supercharger becomes less efficient at high rpm so actual peak power gain may realistically be about 10-15bhp. Irrespective of the increase tailing off a little towards redline, this modification gives a HUGE increase in instant grunt and acceleration which really does transform the car. In some cases, belt slippage has been reported when using smaller upper pulleys but this is attributable to some manufacturers taking a cheap route of making pulleys from aluminium alloy, which loses friction when hot. Our high grade stainless steel pulleys do not suffer from this problem.High grade stainless steel CNC machined upgraded supercharger pulley. Detailed instruction sheet with stage-by-stage photographs. Powerhouse Automotive (UK) Ltd is based in Chesterfield, England.
We supply the UK and world retail and trade markets with uprated supercharger pulleys for Jaguar and Range Rover cars. We also offer rebuild services for Eaton superchargers use don these vehicles, and stock a range of bearing kits for home repair. Under our BrakemastersTM trading arm, we are UK and world leaders in motorcycle brake caliper rebuild services and seal kits. Specialising in motorcycle brakes for years, we have developed an unrivalled range of components and application knowledge.
We are also official agents for Highpower Wizards of Nos nitrous oxide systems, with 25 years enthusiastic experience of nitrous injection. Weekend orders (2pm Friday onwards) cannot be processed until Monday. Those dates are NOT guarantees, they are'best possible', and actual times can be much slower. UK Customers : UK 2nd class small packet post can take a week. We have no control over this, so please try to accept that we are not responsible for slow post.
If you require tracking, please select the additional cost services at checkout. If we have sent an incorrect or faulty item, we will of course cover reasonable return post expense.
Please ensure that you have ordered for your correct model and year of vehicle. We recommend you have items fitted by a qualified professional mechanic, and cannot be held responsible for faults which result from incorrect fitting and assembly. The item "Range Rover Sport 4.2 Supercharger Upper Pulley 10% 2.5lb Upgrade stainless" is in sale since Thursday, August 10, 2017. This item is in the category "Vehicle Parts & Accessories\Car Parts\Engines & Engine Parts\Other Engines & Engine Parts". The seller is "powerhouse-uk" and is located in Chesterfield.This item can be shipped worldwide.