There are numerous cat - back exhaust options out there, but our goal was to craft a high - quality system with a unique, refined sound. We've playfully called it the 'gentleman's cat - back' in our shop to stay true to our mission. Our aim was also to design a single system that fits as many models as possible. Thanks to a unique hanger design and a set of four custom polyurethane hangers in each kit, it fits all EJ and FA20DIT WRX and STI sedans from 2011 to the present.
**Part #: 070034**
**Quick Specs**
- **Custom dual - outlet mufflers**: Dual perforated tubes give a quieter, more refined tone.
- **Quad 3.5' double - wall, angle - cut tips**: This is our most popular configuration.
- **Resonated or Un - resonated options**: You can choose. We suggest resonated for the FA20DIT and un - resonated for the EJ.
- **304 Stainless Steel construction**: Made from genuine American 304SS to handle tough conditions.
- **1/2 - inch thick flanges**: All 7 flanges are laser - cut from a 1/2 - inch thick stainless plate for perfect sealing, easy installation, and great durability.
- **Flex section**: Your motor and mufflers move independently. A flex section prevents exhaust or turbo damage.
- **Custom polyurethane hangers**: Keep your exhaust in place, preventing rattles and bumper issues.
- **TIG welded**: Each cat - back is hand - TIG welded near the design offices, justifying our Lifetime Warranty.
- **GrimmSpeed Lifetime Warranty**: We fully stand behind our products and customers.
**Why GrimmSpeed**
Sometimes, explaining performance products can be technical. This time, it's straightforward. The GrimmSpeed engineering and manufacturing teams are known for high - quality materials, perfect fitment, superior craftsmanship, and durability. If you're fed up with rattling cat - backs, low - hanging tips, loud exhausts, or rusty materials, we have the solution. Beyond the product and its Lifetime Warranty, our customer service team is ready to assist.
**Fitment**
- 2011+ Subaru WRX Sedan
- 2011+ Subaru STI Sedan
**Included Components**
- 2x Muffler Section
- 1x Y - Pipe
- 1x **Un - resonated** Midpipe
- 4x Two - position Poly Exhaust Hangers
- ALL Gaskets and Hardware
- 2x GrimmSpeed License Plate Frame
- 1x GrimmSpeed Decal
**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 your GrimmSpeed Non - Resonated Cat Back Exhaust is a breeze. First, make sure to check if you need the GrimmSpeed Subaru Stock DP to Aftermarket 3 in. Catback Adapter p/n 077046. If you're using a stock j pipe or downpipe, this adapter is necessary. When installing, follow the included instructions carefully. The custom polyurethane hangers will help keep the exhaust in the right place and prevent rattles.
As for maintenance, since it's made of 304 stainless steel, it can handle tough conditions. But it's still a good idea to regularly check the exhaust for any signs of damage, like dents or loose parts. The TIG - welded construction is strong, but over time, make sure all the welds are intact. Also, check the gaskets and hardware to ensure they're tight.
Keep in mind that if you choose the resonated or un - resonated option, it can affect the sound and performance of your vehicle. We recommend the resonated option for the FA20DIT and the un - resonated for the EJ models. If you have any questions or concerns, our customer service team is always here to help.
