【Vehicle Fitment】Front & Rear Catalytic Convertor Compatible with 2004-2006 Lexus RX330 3.3L V6, 2004-2007 Toyota Highlander 3.3L V6, 2004-2006 Toyota Sienna AWD ONLY 3.3L V6---It only fits the model with V6 3.3L, not fit V6 3.3L Full Hybrid EV-Gas(FHEV). Please make sure the model is compatible with your vehicle before purchasing. 【Reference Number】#OEM PartNumber# 750056, 750053, 58144, 57128. Our catalytic converters are built to meet OEM specifications and have EPA certification. 【Product Performance】It features a high-quality stainless steel body and porous ceramic materials with the noble metals of platinum (Pt),rhodium (Rh),and palladium (Pd) adhered to them,significantly boosting the catalytic rate and enhancing the purification capacity. 【Attention】This product approved by the U.S.EPA, it is for vehicles meeting federal emission standards only. It doesn't meet CARB regulations. Selling, installing or using it in California, Colorado, New York and Maine is illegal. 【Easy To Install】Easily installed, connect and fasten it to the exhaust manifold and downstream exhaust pipe. Tighten the bolts or nuts with a torque wrench to the specified torque for a secure connection and to prevent leaks. It's advisable to have it installed at a professional auto repair shop to ensure installation quality and vehicle's normal operation.