At STREET & TRACK INNOVATION TUNING we recognise that performance is everything. Construction of all STi TUNING ST-R exhaust systems, both externally and internally is in light weight stainless steel throughout, the design of each and every system from tube configuration and size to muffler and box dimensions are meticulously calculated to provide maximum performance at all revs.

STi TUNING ST-R exhausts are custom made for us so whether you want 3 inch centre section and backbox to mate with your existing 2.5 inch downpipe flange or 2.5 inch all way through or full 3 inch bore all the way through, etc., we can have our manufacturer have it custom made within a few days.

ST-R exhaust systems extract the beautiful flat four rumble that we all have come to love at its best. Family friendly at idle and on motorways but comes alive at play time.

So you can be guaranteed of highest quality of workmanship and materials and they come with a LIFETIME warranty to the original purchaser.

The systems are available in 2.5 inch (63.50mm) and 3 inch (76.20mm) diameter.

Backbox is 4.5inch (114.30mm) round tailpipe with straight factory position exit. Jap style angle is also available upon request.

Please check out our exhaust system in our Subaru shop section for full pricing details.

Also available for Mitsubishi Evos 4-9 see our Mitsubishi section.