K-Tuned Civic Si Downpipe (12-15) Header, SS **DISCONTINUED**

Upgrade your 2012 - 2015 Honda Civic Si with our K - Tuned Downpipe! Here's why you need it: • Boost Performance: Replace the restrictive stock catalytic converter with a free - flowing 3" downpipe for noticeable performance gains. • High - Quality Design: Cast stainless steel housing and T304 stainless 3" diameter pipe, tig welded for durability. A Vibrant Turbo Flex section absorbs engine movement. • Easy Installation: Comes with all necessary hardware, including O2 plug, nuts, bolt, and washer. Check out our K - Tuned 9th Gen 3' Exhaust System for even more gains! Applications: 2012 - 15 Honda Civic Si. Fits both 2 and 4 door vehicles. Note: It is highly recommended to upgrade your rear engine mount to a Hasport rear mount to limit movement. You must tune the car if you are going to run the high - flow cat. Without tuning, the car will not run properly and can burn up the cat. The 9th Gen Honda Civic SI has a bigger K24Z engine and a new cylinder head design. Stock catalytic converters are restrictive, and replacing them with high - flow units improves performance. The downpipe is available with or without a high - flow cat. Our cat option keeps the cat close to the head for efficient functioning. Note: Replacement studs are 40mm/1.55" and nuts are 3/8ths - 24. Replacement hardware is available as a special request.

Use this downpipe to enhance the performance of your 2012 - 2015 Honda Civic Si. Whether you're a car enthusiast looking for better power or just want to upgrade your daily driver, this product is for you. The downpipe has a 3 - inch diameter pipe made of T304 stainless steel and a cast stainless steel housing. It also comes with a high - quality Vibrant Turbo Flex section. All necessary hardware for installation is included.