SPECIAL 45th Edition: HKS Super Turbo Ti Cat-Back Exhaust | 15-21 Subaru WRX & WRX STI (31029-AF013V)

Regular price $4,975.87 USD Sale price $4,975.87 USD Regular price $6,363.00 USD
Sale 21.8% $1,387.13 USD (21.8%)
In Stock: 1
SKU: hks31029-AF013V
Product Description
The Special 45th Anniversary Edition HKS Super Turbo Twin Tail Titanium Cat-Back Exhaust for the 15+ Subaru WRX & 15+ Subaru WRX STi is a high performance exhaust system for those with discerning taste. It uses the extremely popular Super Turbo design but is made from 100% Titanium alloy for an extremely light system.

The Super Turbo Muffler combines a low back pressure design for improved power and torque but maintains low sound levels at low RPMs for comfortable street driving. This titanium variant cuts the weight of the exhaust system by 50% (when compared to OEM) but still implements the dual exit quad tip design. In order to make it more exclusive, HKS is only made 45 exhaust systems world wide to celebrate their 45th Year Anniversary.

  • Subaru WRX [VA] (2015, 2016, 2017, 2018, 2019, 2020, 2021)
  • Subaru WRX STI [VA] (2015, 2016, 2017, 2018, 2019, 2020, 2021)


  • Full Titanium Alloy Cat-Back Exhaust System with Blue Burnt tips
  • 75mm to dual 60mm piping to quad 54mm exit with 90mm tip
  • Designed to fully fill the exhaust space on the rear bumper
  • Includes mid/center pipe with resonator
  • Meant as a performance exhaust with a subdued sound
  • HKS 45th Anniversary Special Edition (only 45 made world-wide)
  • Proudly Made in Japan by HKS

Extended Information

  • Type: Quad Exit Cat Back Exhaust
  • Piping Diameter: 75mm to dual 60mm
  • Tip Diameter: Quad 90 mm
  • Material: SUS304 Stainless Steel w/ Titanium Tips
  • Sound Level @ Idle: 85 dB (OE 78 db)
  • Chassis: VA
  • Engine: EJ25 / FA20
  • Ground Clarence (from lowest point at oem height): 125 [mm]
  • Weight Total: 13.4 [kg] (OEM is 23 kg)
  • Notes: N/A
  • Warranty: HKS Manufacturers Warranty

To provide faster delivery and turn around time; Kami Speed ships products out from different warehouses throughout the United States. Usually averaging 1-4 business days for processing prior to shipping.

Depending on the package, we ship using different carriers according to the item's location, content, and size.

Freight truck items, will require up to 7 business days to ship due to size. i.e. hoods, trunks, body kits, etc.

All orders made after 3:00pm ET will be shipped or processed the next business day.

Orders over $500 will ship insured and over $1,000 with signature and insurance in order to guarantee delivery. Orders over $1000 may not be able to ship to a different address not listed as the billing address or confirm payment address from the form of payment used. Orders with suite numbers or apartment numbers will require signature if valued over $200.

All international orders outside of the USA are subject to duties and taxes per your countries jurisdiction and determined by customs.
Kami Speed serves the right to ship using an alternative method if we see it fit, in order to expedite shipping and reduce your rate depending on product value.

In stock, non special order items can be returned within 30 days of the product arriving to your house or place of work.
Returns will NOT be accepted on Clearance Items, Final Sales, Special Orders, Opened, Installed, Incomplete, or Otherwise Used Products. In order to initiate a return, an RMA number must be requested and approved via e-mail. All returns will be subject to a 20% restocking fee minus complete shipping cost (roundtrip).

Any processed orders that have not shipped will incur a 6% cancelation refund fee unless the product was not available to ship within a timely manner. No fee will be incurred if used as store credit.

For complete details on our return policy, please see our Help and FAQ link under HELPFUL INFO.

WARNING: Operating, servicing and maintaining a passenger vehicle or off-highway motor vehicle can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle. For more information go to www.P65Warnings.ca.gov/passenger-vehicle.

Customer Reviews

Based on 3 reviews
Christopher B. (North Billerica, MA, US)
Great communication, service, fast shipping!

Ordering the hks limited edition titanium exhaust for my S209 was super easy and convenient thru kamispeed! The communication and service was top notch and I even received it sooner than expected, I would highly recommend ordering thru them as a fully authorized hks distributer here in the US.

Alfred (Los Altos, CA, US)
HKS 4th anniversary Ti Exhaust for STI

Awesome Service for ordering something this rare! A+++!!!

J (Downey, CA, US)
HKS Super Turbo Ti Cat-Back Exhaust (Special 45th Edition)

This is the second purchase I've made with Kamispeed. This purchase along with my 1st purchase has been a painless and headache free experience. All products arrived by their estimated shipment arrival dates and undamaged. The HKS build quality is what we all expect out of HKS - second to none. Fitment. Welds. Materials. However, I discovered an issue with the connection between the mid-pipe and the downpipe when installing this exhaust. The kit calls out for the use of the spherical "ball" style gasket and the spring tensioned fasteners used with the stock exhaust between the stock downpipe assembly and stock mid-pipe. Unfortunately, I've previously changed my downpipe (which is now flat-faced) and exhaust and dumped the stock hardware. I was able to re-use the hardware from my Tomei Expreme Ti cat-back exhaust and luckily had a spare flat-faced exhaust gasket to insert between my downpipe and the HKS exhaust. This HKS exhaust kit does not come with a new replacement spherical "ball" style gasket, flat faced gasket or hardware (spring tensioned bolts, general bolts, washers and nuts). So, if your plan is to use this exhaust with the stock downpipe, keep the stock fasteners to re-use and head down to your local Subaru dealership or Subaru parts page for a new spherical "ball" style exhaust gasket. If your plan is to use this exhaust with an after-market downpipe, you will need a new flat faced exhaust gasket and either you'll need to retain your hardware and re-use them or pick up some new bolts, washers and nuts. This is why my rating for this product is 4-stars. The completeness of the kit was disappointing for an exhaust that cost this much. Performance wise? If you want an aggressive exhaust note, this exhaust is not for you.. Turbo response feels good and I'm still hitting my target boosts levels on my Cobb tune. The STi is a lot LESS angry with the HKS exhaust and tunnel blasts aren't as exciting anymore but I've been told that at some point in your life, you have to grow up. I prefer to live in denial...