This extra idler pulley creates more belt wrap and holds the belt tighter against the supercharger pulley, for less belt slip and more boost. Vitally important for maximum supercharger output, it is especially effective at higher boost levels when the engine is equipped with a smaller supercharger pulley. Comes with a hardcoat-anodized billet-aluminum pulley, high quality bearings, an anodized billet mounting bracket and all hardware to mount to the engine. 555-3340$149.95 www.realspeedauto.com Ph.631-563-7325 All parts listed are for the Ford Mustang unless otherwise noted. Copyright 2012 Realspeed Automotive Inc. All rights reserved. mustang parts:: mustang performance parts:: 2005 mustang parts:: mustang cobra parts:: ford mustang performance parts:: 2005 mustang performance parts:: ford mustang racing parts:: aftermarket mustang parts:: after market mustang parts:: high performance mustang parts:: fox body mustang parts:: billet accessories:: mustang cold air intake:: best lower control arms mustang:: shifters:: short shifter:: shifter:: mustang lowering springs:: pro 5.0 shifter:: mustang clutch::