Hi Jeff, thank you for reaching out! We need more information about your vehicle's emissions label. Kindly locate the label and get all the information from it then call our Parts Team at 1-866-529-0412. We open later at 8 AM EST.

Hi Edward, I'm more than happy to help. No, because the upstream sensors are on the exhaust manifold's pipe. Use the link below to order this assembly while it's 49% off. Happy shopping! https://www.carparts.com/catalytic-converter/evan-fischer/rept960342?can=cpab2020_20220401

Hi T, I'm pleased to assist you. This catalytic converter will not cause a check engine light if your emission is Federal. Check the "Vehicle Emission Control Information" sticker usually found underneath the hood or in the engine bay. Federal emissions stickers will just say, "This vehicle conforms to U.S. EPA regulations". California emissions vehicles will state, "This vehicle conforms to U.S. EPA and State of California regulations". If your emission is California, then this is not the right part and will cause the check engine light. This is covered by a 30-day return policy. If it is Federal, click on the link below to order at 49% off the regular price today while supplies last. I hope this is helpful. Enjoy shopping at Carparts.com! https://www.carparts.com/catalytic-converter/evan-fischer/rept960342?can=CPGG4850_20220331

Hi Robert, I'm pleased to assist you. The size of the thread for the oxygen sensor is no longer mentioned in our database as the fitment is guaranteed to the 2001 Toyota Tundra SR5 8 Cyl 4.7L. You can reuse the old nuts. This part has the same features and specifications as the original part that it replaces, including the sensor port. Click on the link below to order at 48% off the regular price while supplies last. https://www.carparts.com/catalytic-converter/evan-fischer/rept960342?can=CPGG4850 I hope this is helpful. Enjoy shopping at Carparts.com!