Tomei Expreme TI Titantium Cat-Back Exhaust System

2015-2020 Subaru WRX & STI / 2008-2014 WRX & STI Sedan

Ships for free in the 48 states

SKU: TB6090-SB02CWe price match!

In Stock

Add a brutal exhaust note and slim down your WRX or STI’s curb weight with Tomei’s Titanium Cat-Back Exhaust System!
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Tomei Expreme TI Titanium Cat-Back Exhaust System

High-quality production, for true competition use without compromise. Only the best Titanium grade materials are used. From the special racing layout design, made as straight as possible, to the high flow silencer. They have poured their knowledge into it all. When you see their EXPREME Ti system, you'll fall in love with it.

The exhaust flow design was the main focus in the pipe design, the best pipe thickness for weight and strength with the piping diameter to suit torque and all power gains throughout the entire powerband.

When aiming for true performance efficiency, they had chosen to design the exhaust with the least amount of bends possible. Just like the true purpose-built race cars, in a racing layout design, yet to still comply with the stock body design so it can be fitted to any street used vehicles.

Specs & Highlights

  • Main Pipe Diameter: 80mm
  • Diameter (tip): 115mm
  • Exhaust Noise:
    • GVB TESTED @ 4800rpm
  • Ferocious and head-turning exhaust note
  • Lightweight design and construction
  • Features two sound level options
  • Lightweight titanium construction
  • Single driver’s side exit design
  • Features awesome blued tip
  • Drop-in replacement for factory cat-back
  • Comes with hardware and instructions

SubiSpeed Video

Adds a Brutal, New Exhaust Note while Shaving Off Some Weight

To really make your 2015-2020 WRX or STI really turn some heads, you’re going to need a cat-back system that absolutely demands attention. The Tomei Expreme Ti Titanium Cat-Back packs one of the most aggressive exhaust notes into a complete cat-back exhaust system that also cuts more than a few pounds off your WRX or STI’s curb weight. The Tomei Expreme Ti Kit is made out of real Titanium that gives you all of the durability of a stainless-steel exhaust system in a kit that weighs far less than stock and the vast majority of the competition. To further reduce weight, the Tomei Expreme kit features a single-exit design with one massive tip exiting on the left side of your WRX or STI’s bumper. The kit even comes with an optional inner silencer that keeps sound levels a little tamer so you don’t wake the neighbors on those early track day outings.

Full Titanium Cat-Back with Blued Tip and Optional Forward Silencer

The Tomei Expreme Ti Cat-Back Kit comes with everything you need for installation and offers up an excellent fit and near-flawless construction. Each Expreme WRX and STI cat-back is made using 80mm diameter tubing that’s all mandrel-bent to ensure smooth exhaust outflow, even when you’re WRX or STI build is running serious power-adders and custom tuning. The Expreme Ti cat-backs are made using real titanium alloy that’s expertly welded together to ensure leak-free operation. The Expreme exhaust system is topped off with a massive 115mm diameter tip that exits on the left side of your WRX or STI and features a blued end that gives it a race-ready look. Without the optional silencer, this kit is capable of producing 105 peak dB at 4800rpm. With the silencer, peak sound output drops to 96dB giving you some amount of control over the sound volume of the entire Expreme kit. Each Expreme Ti system drops right into place of the stock exhaust and comes with installation hardware and instructions.


  • 2015-2020 Subaru WRX Sedan
  • 2015-2020 Subaru STI Sedan

Check local noise ordinances: this cat-back system is loud enough that it may violate local noise ordinances. Please check local guidelines on noise levels before ordering.

8 customer reviews

Average rating
(based on 8 reviews)
Ease of Installation
Fit / Quality
Overall Satisfaction
  1. By Jhon December 19, 2022

    Perfect sound for any subi

  2. Amazing exhaust!

    By Hector March 18, 2021

    This has got to be one of the best exhaust systems I have ever purchased. The build quality is absolutely amazing, fits together perfectly, installs easily with no fitment issues at all. I was worried it would be way too loud, but with factory j- pipe it is barley noticeable unless you are in the throttle. Love this exhaust so much!

  3. Amazing sound

    By Alex January 25, 2021

    It took me 45min to install. It was really easy to install. It gives it the natural “subie rumble” that all car enthusiasts crave for. I would definitely recommend it for anybody looking for a cat back exhaust.

  4. Make your FA rumble

    By Logan December 18, 2020

    I bought this because Tomei is solidified as high quality company, and my last exhaust just was not doing it anymore. This one is loud. Cold starts will anger your neighbors, and the silencer that comes with it is kind of a gimmick. That aside, even installed on an FA engine, the exhaust note almost brings you back to your first 200k mile 2004 EJ WRX. Superb welds and craftsmanship, easy installation. only negative I found was that near the middle hanger, the pipe WILL tap and rattle against a part of the underside slightly, but not excessive. A friend of mine has one on his 2018 STI and complains about the same issue.

  5. Tomei Expreme Ti Titanium exhaust

    By Derek January 19, 2019

    So i didnt order it through subispeed due not having it in stock at time but must say anyone want a nice exhaust and lightweight suggest this exhaust. I bought it for weight saving and noise level. I was expecting it to be louder inside the car but its actually not bad. I dont have any rattling noises with the springs that need to be installed and was real simple to install. Will suggest when installing it have extra set of hands to hold exhaust up has you put springs in place for safety.

  6. Fannnnnntasticcccccc

    By BlackStig August 31, 2017

    I did a lot of study on which exhaust should I get for my 2018 WRX. Finally decided to go with the Tomei and surely it doesn't disappoint. The quality is superb and sounds soooooo nice without bleeding your ears. Considering it is full titanium, best bang for the buck for sure. Also very pleased with the Subispeed exhaust delete, solid piece of metal to cover up the hole. I'm a very happy man.

  7. Fantastic exhaust.

    By Chase July 7, 2017

    Looks great, welds are beautiful. Very lightweight. Be sure and grab the right side exhaust delete with this if you need it! Deep rumble, sounds mean at WOT. Couldn't be more happy with my purchase.

  8. Great product.

    By Michael October 26, 2016

    Super lightweight! Perfect welds, great looking burnt tip, awesome sound! Best catback available in my opinion and it's less than $1000!

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