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Description
The Supreme SP for the Subaru STI Sedan features much larger diameter piping, resonators and mufflers, but also smoothes the layout for maximum performance with good sound suppression. This cat-back exhaust starts out with a full 3” mid-pipe with a large straight-through resonator to tune out drone. The next section smoothly transitions into dual 2.5” diameter piping. Improved dual GReddy straight-through mufflers with dual, double wall tips on each muffler finish off the exhaust. GReddy designers carefully position the dual mufflers and staged tips to flow with the GV-chassis’ bodylines.
Vehicle(s): WRX & STI Sedan
Chassis: GV8
Engine: EJ257
Type: cat-back, dual muffler system
Number of pieces: 4
Piping: 76 mm (3") - 2x 63.5mm (2.5")
Tip(s): 4x 89 mm (3.5")
Gasket(s): 2x 2.5" & 1x 3" oval (qty: 3 included) replacement(s)
Resonator: Yes
Weight: TBA lbs
Sound level: L89 & R91 dB(a) @4000
Notes: reuse factory doughnut-gasket and hardward for mid-pipe
Dyno Chart
HP: +14 hp
TRQ: +22 ft-lbs
*Data collected on stock vehicle *Retains catalytic convertor, front pipe
*TBA = To Be Announced
