** Wideband UEGO sensors are wear items and their lifespan is determined by many factors including contamination from leaded fuels
If you do not do this
your entire fluid volume is doing a complete lap of the system every 2sec
3 inches in outside diameter with a 1-3/8 inch flange which is designed to push on to the existing rubber breather grommets
*Depending on vehicle
PULLEY, IDLER, ENGINE, EP025 Punto Evo ** Wideband UEGO sensors areCommodore Tensioner Pulley A C; Idler Pulley A C (Steel) Feb 2004 Jan 2006, 5. 7L, V8, 16V, OHV, MPFI, VZ, 235kW, EngCode: LS1 GEN III Tensioner Pulley A C; Idler Pulley A C (Steel) Feb 2006 Aug 2007, 6. 0L, V8, 16V, OHV, MPFI, VZ, 260kW, EngCode: L76 GEN 4 Tensioner Pulley A C (Steel) Aug 2006 Aug 2010, 6. 0L, V8, 16V, OHV, MPFI, VE, 270kW, EngCode: L98 GEN 4 Tensioner Pulley A C; Idler Pulley A C (Steel) Sep 2010 Apr 2013, 6. 0L, V8, 16V, OHV, MPFI,