HKS SUPER TURBO MUFFLER Catback Exhaust | 15-21 Subaru WRX Sti (31029-AF013)
HKSSuper Turbo Muffler Catback Exhaust Kit by HKS
Super Turbo Series™ 304 SS Cat-Back Exhaust System with Quad Rear Exit (31029-AF013) by HKS®. Exhaust System Type: Cat-Back. Exhaust Tubing Material: 304 SS. Main Tubing Diameter: 2.95" to 2.36" and 2.13". Exhaust System Sound: Aggressive / Loud. Professionally developed with a racer in mind, this HKS exhaust system provides an easy opportunity to upgrade both the horsepower and sound of your precious vehicle. Made from first class materials, it will serve you for years to come. Exhaust Efficiency & Sound Pressure Reduction are implemented together. The turbo engine master HKS challenged to implement the following 3 characteristics together to develop Super Turbo Muffler.
Features
- Exhaust System Type: Cat-Back
- Exhaust Tubing Material: 304 SS
- Exit Location: Quad Rear
- Main Tubing Diameter: 2.95" to 2.36" and 2.13"
- Exhaust System Sound: Aggressive / Loud
- Muffler Body Shape: Oval
- Tip Quantity: 4
- Tip Finish: Burnt
- Tip Material: Titanium
- Tip Outlet Diameter: 3.54"
- Tip Shape: Round
- Tip Style: Ti-1
- Exhaust Series: Super Turbo Muffler
- Pieces: 4
- Sound Level Stock: 74 dB
- Sound Level HKS: 81 dB
- Idle Sound Level Stock: 55 dB
- Idle Sound Level HKS: 62 dB
Benefits
- Effective on stock to high performance vehicles w/ upgraded turbines.
- The performance exhaust sound meets the JASMA standard
- Unique exhaust sound designed specifically for the engine
- Upgrades both the horsepower and sound of your vehicle
- Made from premium quality materials
- Ensures reliable operation for years to come
Applications
- 2015 - 2021 Subaru WRX
What's In The Box?
- 1 - Super Turbo Muffler Catback Exhaust Kit
Warranty
- Manufacturers Standard Warranty
Customer Reviews
I have a 2019 STI with a Killer B EL header, Dom 1.5 10cm, MAP GESI catted 3" downpipe, and originally had a GrimmSpeed resonated catback. Long story short I really wanted to like that catback but the excessive drone I got with it on my particular setup is what turned me away from it eventually. I picked this up to replace it and it's pretty much exactly what I was looking for from the beginning. It's pretty civil driving around normally and opens up more when driving spiritedly so that's perfect for me. When I'm cruising at highway speeds the exhaust note pretty much gets lost in the road noise so it's very livable even with full bolt ons. If you're looking for something that's louder than stock but not obnoxiously loud and doesn't drone I would definitely recommend this.
My only complaint is that it's advertised as a 3" catback but it necks down to 2.5" at the downpipe flange since its designed for an OEM style downpipe. This is sort of implied on their site but not explicitly called out so I wasn't sure. Anyway, I'm currently running a 3" downpipe adapter and I want to say there is maybe a small difference on the butt dyno compared to my previous full 3" catback but nothing crazy, could just be in my head. Regardless I might look into having a performance shop convert it to a 3" flange so I can have a full 3" TBE again.
