Every car and truck has different gains between these systems. In fact, some manufacturers only make axle back systems for your car. The factory muffler is usually pretty restrictive since it needs to be quiet, so this is usually where most of the power is gained from on a catback vs axleback debate. Intermediate PipeThe intermediate pipe, also known as the mid pipe, is designed to fit between the catalytic converter/cat delete pipe and the muffler section.
This exhaust is not to loud and obnoxious to people in my neighborhood. One of the finest purchase I made when I was looking for a exhaust. I purchased this exhaust for the seamless integration with the factory valves. Truth be told, I ran into a couple issues with delivery and fitment, but IE stepped up in a big way and turned this into a really great experience.
Although phosphorus is no longer used in gasoline, it (and zinc, another low-level catalyst contaminant) was widely used in engine oil antiwear additives such as zinc dithiophosphate (ZDDP). Beginning in 2004, a limit of phosphorus concentration in engine oils was adopted in the API SM and ILSAC GF-4 specifications. Some three-way catalytic converter systems have air injection systems with the air injected between the first (NOx reduction) and second (HC and CO oxidation) stages of the converter. As in two-way converters, this injected air provides oxygen for the oxidation reactions.
At Walker, it's more than peace of mind in knowing we lead the industry with unparalleled level of compliance. It's more than our precision-fit or full engine-to-tailpipe product offering, Walker sets the standards. The Carven-R series Performance Muffler delivers an aggressive sound with a refined tone.
We’ve seen as much as +12 WHP when we tested our turbo-back for the 2022+ Honda Civic! For this version, we do recommend a tune and a device like a Ktuner V2 or Hondata Flashpro to take full advantage. Since the OEM catalyst is replaced with the downpipe, the Turbo-back system is sold for Race Use Only. Most aftermarket catback systems for the RS3 mimic the factory twin-pipe setup making it easy to connect to the downpipe. This approach works fine for stock to mildly tuned engines but struggles to keep up with the demands of aggressive calibrations and big turbo setups. The IE catback center pipe is a massive 3.5" straight-through pipe that splits into dual 3" pipes out the back with the valves open.
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. This is achieved by burning off the excess hydrocarbons which result from the extra-rich mixture required for a cold start. Your go-to spot for information on the exhaust system, as well as mufflers, catalytic converters, pipes and sensors.
One upgrade that's almost universally permissible is in the exhaust system downstream of the second oxygen sensor. Because that sensor is always located right after the catalytic converter, we refer to these systems as "cat-back." So let's hear what we've been missing. Other than Invidia catback exhaust products we also carry their extensive line of invidia