The new Large Bore-HD exhaust is engineered to perform in the most extreme environments. This system is constructed from mandrel bent 4" stainless steel tubing for maximum flow, increased horsepower, increased torque and lower EGT's. This system is available in 4" cat-back with muffler. Large Bore-HD exhaust systems are the perfect combination of performance, fit and value. For over 40 years, MagnaFlow has maintained its position at the forefront of high-end catalytic converter and performance exhaust manufacturing. MagnaFlow stands by its products with industry-leading warranties in service of its mission to provide the highest quality exhaust experience from start to finish.
Noticeable gains will be noticed in the initial throttle response, with reduced turbo lag. Engine movement and exhaust weight are transferred into the exhaust hangers, which puts a lot of stress on the mount brackets. IE's catback system is manufactured with multi-point and boxed-in hanger mounts designed to stand the test of time. Drive confidently knowing your exhaust is securely mounted and protected against annoying rattles or breaks. All piping is constructed of mandrel-bent T304L stainless steel to offer superior corrosion resistance.
The amount of horsepower gained from installing a cat-back exhaust system varies by vehicle and the system’s design. However, when combined with other performance enhancements, the gains can be more significant. The primary goal of a cat-back exhaust is to reduce back pressure, allowing your engine to breathe better and operate more efficiently. The factory exhausts come in mandrel bent tubes made of stainless steel or aluminized steel. Besides offering longer durability, the construction also ensures there’s free flow of gases. To improve this, you can opt to replace some parts of the exhaust system using aftermarket performance exhaust systems.
I do live in a residential community and want to keep things civil with my neighbors...so I went with the resonated/muffled setup. Orders of $299.99 or more ship free within the continental U.S.Shipping to Alaska and Hawaii is additional and not included.We do not ship international at this time. Enter your email address above, to be notified of new products released. Sign up to our newsletter and stay up to date on all the latest news, products and events.
Video Features Options Short video of our 3" Catback Exhaust for the 07+ Honda Civic Si Sedan. Note that this was installed on a naturally aspirated setup (stock header and... Already own an