The legacy of the GReddy SP lives on with GReddy’s best version yet, the Supreme SP and to prove it carries a limited lifetime warranty! From the 1st flange to the new double-wall GReddy Tip, each Supreme SP system features a high-quality, hand Tig-weld 304 stainless-steel outer construction. Within the muffler, new straight-through and directed- straight-though chambered muffler designs allow GReddy to engineer a more refine exhaust note while increasing exhaust flow and performance. Classic GReddy street performance styling is maintained with excellent fitment and a stylish exhaust system layout. The Supreme SP not only designed to perform and sound great for each specific application; it matches the vehicle’s body-lines and styling.

The Supreme SP for the Subaru STI hatchback features a large horizontally mounted, 3-section muffler with a “tucked-away” layout. This routing allows for the large 3” diameter piping to more smoothly enter the muffler’s center section. Exhaust gases exit each side of the revised muffler via the two 2.5” diameter piping to quad staggered 3.5” GReddy double-wall slash cut tips, The non-tapered 3” mid-pipe also encases a large resonator section to tune-out drone. Like all GReddy Supreme SP systems the fully hand-welded 304 Stainless-Steel exhaust carries a Limited Lifetime Warranty.

Chassis:  GRB
Engine:  EJ25
Type:  cat-back system
(horizontally mounted muffler with dual outlets)

Number of pieces:  3
Piping:   76 mm (3″) – 2x 63.5mm (2.5″)
Tip(s):  4x 89mm (3.5 “)
Gasket(s):  3″ oval (qty: 2 included) replacement
Resonator:   Yes

Notes: reuse factory doughnut-gasket and hardward for mid-pipe

Weight:  39.8lbs  (-2.8lbs)
Sound level:  L82 / R83 dB(a) @4000

Dyno Chart
HP:  +TBA  hp
TRQ:  +TBA  ft-lbs