Want to know if I need a 2.5 or 2.0 catilayc converter

Hi, this is Bo, an auto expert on RepairPal's Car Genius team! The Delta 88 LS base model would typically need a catalytic converter with a 2.5-inch inlet and outlet diameter. However, it's essential to verify this information by checking the specifications of your specific vehicle. You can always call the dealer with your VIN and they should be able to provide you with a part number. They can confirm the correct size and type of catalytic converter needed for your car's make, model, and engine configuration to ensure proper fitment and performance. If you have any other questions feel free to call us at 877-913-1554! We'll gladly find you a certified RepairPal shop in your area!