The difference is that the dual exhaust system has two exhaust systems on one vehicle. Meaning, when modifying your exhaust, never start from the front of your turbocharged vehicle with a downpipe or with headers on your naturally-aspirated platform, you will create a bottleneck in the flow. By starting with a cat-back first, your exhaust gases will flow more freely if the rest of your system is stock.
Cat-back exhaust system kits come standard with tailpipes, a performance muffler and exhaust tips. The inclusion of our wider, mandrel-bent tailpipes means cat-back exhausts are your go-to for increasing your performance gains along with boosting your sound. While horsepower and torque gains vary from vehicle to vehicle, you can expect anywhere from a percent gain in horsepower and torque after installing a cat-back exhaust system.
Make sure your Subaru, Nissan, Honda, or Toyota is outfitted with a top notch exhaust system from Racing Exhaust System. Some are ideal for normal vehicles while others are better for high-performance engines. Products manufactured by REMUS without (EC-)approval are only eligible for usage at motor sport events or tests within the meaning of KFG 1967.
By running pipes from the catalytic converter to the muffler and from the muffler to the exhaust tip, cat back exhaust systems improve exhaust gas flow, providing small performance boosts. However, your performance gains may be limited if your catalytic converter restricts gas flow, as a catback exhaust system is installed ‘downstream’ of the converter. Header-back systems are increasingly rare, namely because of modern emissions systems. Since removing your vehicle’s factory emissions components is highly illegal, the previous two options are more common. However, header-back systems are still available for some older, pre-emissions applications. In these cases, header-back systems offer more performance and volume than cat-back or axle-back systems