An upstream air injection point, ahead of the catalytic converter, is also sometimes present to provide additional oxygen only during the engine warm up period. This causes unburned fuel to ignite in the exhaust tract, thereby preventing it reaching the catalytic converter at all. This technique reduces the engine runtime needed for the catalytic converter to reach its “light-off” or operating temperature. Many vehicles have a close-coupled catalytic converter located near the engine's exhaust manifold. The converter heats up quickly, due to its exposure to the very hot exhaust gases, enabling it to reduce undesirable emissions during the engine warm-up period.

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.

CORSA exhaust parts, hardware and detailed instructions are included in each kit so you can get on the road as fast as possible. We hope this article has provided a thorough answer to the question of what is a catback exhaust and provided advice on how they can help improve the performance of your car. While they may not provide a big performance boost for all cars, cat-back exhausts are a simple and effective way to improve gas flow in your exhaust system beyond what stock exhausts are capable of. Catalyst poisoning occurs when the catalytic converter is exposed to exhaust containing substances that coat the working surfaces, so that they cannot contact and react with the exhaust. The most notable contaminant is lead, so vehicles equipped with catalytic converters can run only on unleaded fuel.

Not only do our products boost performance and optimize exhaust flow, but we also add a touch of personalization to your ride. Find the perfect performance exhaust system compatible with Ford, Ram, Chevy/GMC, Jeep, and more. Our patented design outflows all other exhausts on the market. The CORSA Performance GT350 Active valve exhaust system allows the driver to flexibility of having one exhaust that produces both an Xtreme and a Sport sound level.

Our exhaust system uses larger piping compared to the factory exhaust system, yet weights 5 lbs. The factory system uses 2.56” piping, which reduces to 2.36” before splitting, greatly diminishing the overall diameter of the system. Finally, our system’s 4” exhaust tips dwarf the factory 3.15” tips, giving the rear of the vehicle a sportier look. Beautifully hand-crafted T304-stainless-steel components adorn the system with stunning TIG-welding throughout.

The remaining waves produce the deepened and enriched exhaust acoustics you love. Stillen offers a variety of exhaust systems for many vehicles, both foreign and domestic. The muffler is a glass filled, large chamber design that provides the optimal amount of exhaust velocity for the engine while producing a great low rumble sound - without any annoying buzzing, “racer” sound. The high clearance fitment dramatically reduces the risk of getting hung-up on obstacles when off-roading. We’ve been helping customers with performance upgrades since 2006, and have a staff full of people who can help answer your questions. Our customer service — from our low prices to our fast shipping — has earned us a reputation with a legion of fans.

The cat back system’s pipes have a larger diameter than a standard set. So, your vehicle will get to perform better at a fraction of the work it outputs. An&nbsp