Tuning up your Subaru is easy with an Invidia catted down pipe. A key element to getting more performance is enhancing the car exhaust system so that there is less air restriction to overcome. And not all racing exhaust parts are created equal. An Invidia catted down pipe is a quick answer for drivers who know what the missing piece to their horsepower puzzle is.
Invidia catted down pipes have a 3″ wide diameter and are bolted onto a stock or aftermarket exhaust. The primary feature is a divorced wastegate along with a catalytic converter. The OEM exhaust in a WRX/STI or Forester XT is not configured for max performance because the stock cat and surrounding pipes do not let exhaust gases flow freely. These gases are being held up in the exhaust process. The divorced wastegate in theInvidia catted down pipe works by separating the exhaust gases that loosens up massive exhaust flow, which translates into more horsepower and torque. Exhaust gases are still kept in check by the divorced turbo downpipe, so your car won’t be emitting clouds of harmful exhaust that attracts the wrong kind of attention.
It is not a secret why Invidia catted down pipes have been used by a wide range of Subaru performance drivers. Whether for competitive racing or simply to throw out more power on the city streets, manipulating the stock car exhaust is an important part of the custom process. When exhaust flows liberally, the engine has more capability to produce. Your car will see a boost in both horsepower and torque that makes a difference. However, there isn’t one answer as to how much HP Invidia catted down pipes are responsible for. Dyno tests on three Subaru models (Impreza WRX/STi, Forester XT, and Legacy GT) conclude that the number is in the 4-7 HP range. Torque has been estimated to be approximately 25 ft-lbs.
This Invidia catted down pipe includes an extra O2 sensor bung (before the cat) for drivers who would like to use a wideband AFR, allowing you to keep your OEM sensor intact. Plugs come with the pipe already installed, so there is no need to order them in addition to the pipe.
Installation involves bolting the Invidia catted down pipe to your pre-existing exhaust components or a replacement cat back. The flanges on the Invidia wideband downpipe are noticeably thick, so the bolts you receive with it are extra-long. A new gasket is highly recommended to purchase prior to installation. It is also suggested to do a system check and purchase replacements for any worn out or damaged stock gaskets.
When it comes to the manufacturing process, Invidia employs a three-step process. All Invidia wideband downpipes (regardless of model or application) are made from 304 grade stainless steel, including the flanges. The flanges are CNC-machined to govern their fitment to other exhaust components in your car’s undercarriage. Each pipe is put into a mandrel-bender, which mechanically puts bends in the pipe according to car model and application. Invidia also uses TIG welding to promote extra durability and to prevent cracks.
In the world of Subaru performance tuning, choosing the correct parts involves doing research on what works and what doesn’t. Invidia is a brand that has been recognized throughout the industry for their commitment to quality and a racing-inspired edge. Many of their parts are designed for owners of Subaru sport compacts, which means they are experts on everything your car needs and what exhaust components work the best. A high percentage of Subaru drivers for the WRX and XT are racers who compete in sanctioned events across the country. Invidia wideband downpipes are used by these motorists as well as tuners who stick to the city streets.
If you are a not a competitive racer and plan to use an Invidia downpipe on a street model, it is recommended that you consult your local motor vehicle commission or law enforcement agency prior to installation. This part may not conform to certain emissions guidelines in some jurisdictions.