Review on 🚗 Walker Exhaust Ultra EPA 54579 Direct Fit Catalytic Converter: Advanced Emission Control Technology for Optimal Performance by Brian Kumar

UPDATE: I lost 4mpg from 24 to 20 after 2 cans of gas. I will try to come back. Future updates are expected. ORIGINAL POST: 2" tube, 2 1/4" SPARE PIPE! My wife's HHR isn't a hot rod, it's a 2.4-liter automatic LT model. 20 foot burnout. No longer! I installed this center tube and the result was a HUGE LOSS OF TORQUE AND PERFORMANCE WITH THIS PIPE! I basically eliminated all the benefits I had from taking it and then some. It was a clean and easy install with a liquid key the day before. . Everything was fine, just disappointed with how the car is running now. Well, I had to buy the high-performance model for an extra $100. now it is late and we will sell this car next year.