Our LFP billet idler pulleys are custom-sized at 100mm (3.9"). These single-bearing pulleys are LFP's most popular, and in a properly set up system, should be expected to be a permanent solution to the problem of failure-prone OEM idler pulleys.
LFP 50mm IDLER PULLEY fits 2009+ CADILAC CTS-V SUPERCHARGED ZL1 CAMARO 8 RIB
Metco Motorsports 100mm Idler Pulley kit For The 2015-2019 C7 Z06 Corvette
2009-15 CADILLAC CTS-V 2012+ CAMARO ZL1 SUPERCHARGED 100mm IDLER PULLEY MIP-100V
2003-04 SVT MUSTANG COBRA 4.6L SUPERCHARGED AUXILLARY 100mm IDLER PULLEY KIT
LFP 50mm BILLET LOWER IDLER PULLEY fit 2012+ CAMARO ZL1 09+ CTS-V WITH REDUCER
Metco 100mm Billet Double Bearing Idler Pulley Cobra/Lightning MIP-100D