GReddy Supreme SP Exhaust - 08-14 Subaru Impreza WRX STI Hatch GRB

Regular price $904.46 USD Sale price $904.46 USD Regular price $1,004.95 USD
Sale 10.0% $100.49 USD (10.0%)
Sold Out
SKU: gre10168200
Product Description
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.

  • Subaru Impreza WRX STI [GRB Hatch-back] (2008, 2009, 2010, 2011, 2012, 2013, 2014)
  • Subaru Impreza WRX [GR Hatch-back] (2011, 2012, 2013, 2014)


Large diameter piping, resonators, and mufflers
Smooth layout for maximum performance with good sound suppression
Full 3” mid-pipe with a large straight-through resonator to tune out drone
Dual 2.5” diameter piping and mufflers
Double wall tips on each muffler
Staged tips to flow with the GR-chassis’ body-lines
Hand-welded 304 Stainless-Steel
Limited Lifetime Warranty

Extended Information

Chassis: GRB
Engine: EJ25
Type: cat-back system (horizontally mounted muffler with dual outlets)
Number of pieces: 3 pieces
Piping: 76 mm (3") - 2x 63.5mm (2.5")
Tip(s): 4x 89mm (3.5 ")
Gasket(s): 3" oval x2
Notes: reuse factory doughnut-gasket and hardward for mid-pipe
Weight: 39.8lbs (-2.8lbs from stock)
Sound level: L82 / R83 dB(a) @4000
Power: +20 whp / +5.5 ft-lbs

To provide faster delivery and turn around time; Kami Speed ships products out from different warehouses throughout the United States. Usually averaging 1-4 business days for processing prior to shipping.

Depending on the package, we ship using different carriers according to the item's location, content, and size.

Freight truck items, will require up to 7 business days to ship due to size. i.e. hoods, trunks, body kits, etc.

All orders made after 3:00pm ET will be shipped or processed the next business day.

Orders over $500 will ship insured and over $1,000 with signature and insurance in order to guarantee delivery. Orders over $1000 may not be able to ship to a different address not listed as the billing address or confirm payment address from the form of payment used. Orders with suite numbers, different billing, or apartment numbers will require signature if valued over $100.

All international orders outside of the USA are subject to duties and taxes fees per your countries jurisdiction and determined by customs.
Kami Speed serves the right to ship using an alternative method if we see it fit, in order to expedite shipping and reduce your rate depending on product value.

In stock, non special order items can be returned within 30 days of the product arriving to your house or place of work.
Returns will NOT be accepted on Clearance Items, Final Sales, Special Orders, Opened, Installed, Incomplete, or Otherwise Used Products. In order to initiate a return, an RMA number must be requested and approved via e-mail. All returns will be subject to a 20% restocking fee minus complete shipping cost (roundtrip).

Any processed orders that have not shipped will incur a 6% cancelation refund fee unless the product was not available to ship within a timely manner. No fee will be incurred if used as store credit.

For complete details on our return policy, please see our Help and FAQ link under HELPFUL INFO.

WARNING: Operating, servicing and maintaining a passenger vehicle or off-highway motor vehicle can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle. For more information go to

Customer Reviews

Based on 2 reviews
Billy R. (Dallas, TX, US)
Excellent customer service!

Phenomenal customer service and expedient shipping! They also provide military support!

Kevin C.
Exactly what I was looking for!

I've done my research inside and out about the Greddy Supreme SP and KamiSpeed pulled through with lightning speed. Exactly what I was looking for and at the best price!