GReddy Supreme SP Cat-Back Exhaust - 06-11 Honda Civic Si

Regular price $797.90 USD $678.22 USD

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Part # gre10158208

About This Item

The Supreme SP Cat-Back Exhaust for the 06-11 Honda Civic Si FG coupe embraces the classic GReddy Civic styling that has made the SP line so popular over the years. A large diameter 63.5mm (2.5”) piping, updated resonator, improved muffler section, and our new limited lifetime warranty make this the ideal combination of fitment, styling, and performance.

  • Honda Civic Si [FG2 - Coupe] (2006, 2007, 2008, 2009, 2010, 2011)
  • Honda Civic Si [FA5 - Sedan]*** (2006, 2007, 2008, 2009, 2010, 2011)

***It is also designed to be compatible with the Sedan Si models via the optional 11050104 adapter


Large oval muffler and 102mm tip
Made for maximum muffler ground clearance
Single 63.5mm (2.5") piping
Exceptional sound and power for the K20
Classic Supreme SP 102mm (4") laser engraved GReddy tips
Hand-welded 304 Stainless-Steel exhaust
Limited Lifetime Warranty

Extended Information

Models: Si Coupe, Si Sedan-use with 11050104*
Chassis: FG2
Engine: K20
Type: Cat-back exhaust
Number of pieces: 3 pcs
Piping: 63.5 mm (2.5 ")
Tip: 102 mm (4.0 ")
Gasket(s): 2.5 " oval x2
Resonator: Yes
Weight: 27.5 lbs (Stock weight 27.3 lbs)
Sound level: 90 dB(a)
HP: +5 hp
TRQ: +3 ft-lbs

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Return & Cancelation Policy

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 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.