Our design concept is to provide a sporty and authentic exhaust note, while improving performance, and enhancing the visual styling of your vehicle. Each product is carefully developed, and then expertly crafted by our own factory. The whole reason I decided on an IE cat back vs mbrp or AWE was the craftsmanship. However I do live in warm and sunny south Florida so I know it will only see tons of rain but never salt or snow unless it’s an impromptu trip. I love the lil burble crack when going down in rpm and down ship. I wish it were a little louder but if that we my main goal I’d have just gutted cats n resonators n left stock mufflers.

Walker is your one-stop exhaust shop, offering a full line of mufflers, pipes, hardware and accessories. Cat to Y pipe intersection showing after cat O2 sensor location. This qualifies as one of the STRANGEST stock exhaust parts I have seen. For some reason Toyota/Lexus decided to weld a straight section of 60mm pipe to the cat outlet flange, angle cut it, weld a 50mm pipe pipe that has its last couple of inches expanded to 60mm and match angle cut. Also note the O2 placement is in the 50mm sections of the Y pipe where the sensor tip takes up a good portion of the available flow area.

To maintain catalyst efficiency, the air–fuel ratio must stay close to stoichiometric and not remain rich or lean for too long. All of Milltek’s performance exhaust systems are manufactured from T304L stainless-steel