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. Like all GReddy Supreme SP systems the fully hand-welded 304 Stainless-Steel exhaust carries a Limited Lifetime Warranty.

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

VIP Motorsport is an official Dealer of GReddy / Trust Performance products in the UK. Our stock is directly linked with GReddy USA, if the item is out of stock with us it could take up to two working weeks to arrive with you.