You also need to be careful when tightening the bolts on the cat back. Over-tightening can damage the system, so just make sure they're tight enough to hold everything in place. It's important to make sure that the cat back is properly aligned with the exhaust pipe. If it's not, you could end up with an inefficient or even dangerous exhaust system. Competitors often rely on generic silencers or gimmicks that claim to cut out drone without any real knowledge or development involved.
Exhaust systems also play a role in reducing noise levels, improving engine performance and reducing fuel consumption. To get the power level up to 785 hp, Shelby installs a Ford Performance supercharger, as well as a new carbon-fiber air intake tube, high-performance fuel injectors, and an aluminum heat exchanger. A Borla (cat-back) exhaust system rounds out the list of powertrain modifications.
Less restrictive catalytic converters paired with a cat-back exhaust system will offer high performance and power. Though, the level of horsepower gained is not constant across all cat-back systems. It depends on the quality and performance of the catalytic converters. Because of the better flow of exhausts resulting from the mandrel-bent tubing and the larger diameter piping, cat-back exhaust systems manage to offer better performance. IE offers catback, downpipe, and midpipes upgrades to replace individual sections of your exhaust. Installing variations of these parts allows you to dial in your exhaust volume to your preference, from sporty to aggressive.
As a result, the glass pack mufflers end up producing sounds that are more aggressive and louder than the straight-through muffler. This is a little bit different from most original exhaust systems. Today we’ll focus on the cat-back exhaust systems and what makes them stand out. There are the header-back, turbo-back, axle-back and cat-back systems.
Considering cat-back exhausts replace more restrictions, they typically offer increased performance and noise compared to axle-back systems