The HKS Racing Cat Back Exhaust is a top - notch product designed for 2011 - 2014 Subaru WRX and STI Sedans. It offers enhanced exhaust flow and a great sound. Crafted from 409 Stainless Steel, a premium material, this exhaust ensures long - term reliable operation. With a 3.35 - inch inner tubing diameter and a 4.75 - inch tip diameter, it's built for performance. The exhaust doesn't come with a silencer but includes gaskets and hardware. The piping is coated black to resist rust and corrosion, and the muffler has a polished finish with a titanium - finished tip. It can reach a close sound level of 95 dB. Note: If you're using a stock j pipe or downpipe, the GrimmSpeed Subaru Stock DP to Aftermarket 3 in. Catback Adapter p/n 077046 is required.
Using this HKS Racing Cat Back Exhaust is straightforward. First, make sure to gather all the included gaskets and hardware. If you have a stock j pipe or downpipe, don't forget to get the GrimmSpeed adapter. Install the exhaust following the standard procedures for your 2011 - 2014 Subaru WRX or STI Sedan. As for maintenance, regularly check the exhaust for any signs of damage or rust. Since the piping is coated black for protection, try to keep it clean to maintain that protection. If you notice any unusual noises or a decrease in performance, have it inspected by a professional. With proper use and care, this exhaust will serve you well for many years.
