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.
By freeing up the restrictions in the exhaust system, a cat back exhaust can help your engine to breathe more freely. This, in turn, can lead to a significant increase in horsepower. If you love cars just as much as we do, then you know that one of the best upgrades you can make to your vehicle is a cat back exhaust. But if you're not familiar with this term, don't worry – Vandemon Performance is here to break it down.
Namely, it replaces the rear axle-back and tips and then a portion of what we refer to as the mid-pipes. This system is emissions friendly and doesn’t require any tuning. In New Jersey, vehicles must pass emissions testing to ensure they meet environmental standards. Since cat-back exhaust systems do not modify the catalytic converter or engine management system, they generally do not affect a vehicle’s ability to pass emissions testing.
A faulty exhaust system can cause a decrease in power, acceleration and fuel efficiency, as well as potentially exposing drivers and passengers to harmful gases, so issues should be fixed immediately. We have a wide range of exhaust systems in stock – browse our range and find the correct exhaust system for your car below. There are many distinct and differentiable features to each of many cat back exhaust systems, meaning it’ll be easys to find a do-it-yourself cat back installation. The modifications directly bolt where the original exhaust is, so there won’t need to be excessive installation. You’ll have everything you need to replace the exhaust with the pipes, muffler, and tips that come with a DIY package.
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