2004-2007 Subaru STI — Exhaust

Fetched 4d ago · Refreshes in 56d

1. 1

   Injen

   Injen's SES cat-back exhaust is the most commonly recommended option on GD STI forums for its aggressive sound, quality construction, and proven reliability across the generation.

   Widely available through major performance retailers.

2. 2

   HKS

   HKS Hi-Power exhaust systems are trusted by GD STI enthusiasts for balanced performance gains, quality welds, and consistent fitment across 2004-2007 models.

   Widely available through major performance retailers.

3. 3

   Grimmspeed

   Grimmspeed's exhaust and turbo-back options are locally engineered for the Subaru platform and highly regarded for their precision fitment on the GD chassis.

   Sold direct through Grimmspeed's own site and authorized Subaru performance retailers.

4. 4

   Tomei

   Tomei's Expreme Ti cat-back is favored by GD STI owners seeking premium sound and performance with Japanese build quality and proven longevity.

   Widely available through major performance retailers.

5. 5

   Borla

   Borla's S-Type exhaust for the GD STI offers quality construction, a distinctive tone, and strong community reputation for durability in this generation.

   Widely available through major performance retailers.