GReddy Supreme SP Cat-Back Exhaust - 12-15 Honda Civic Si

Regular price $800.00 USD $720.00 USD

Ready To Ship! Special Order! Ships in 14+ weeks

Hurry! Only 5 left in stock.

Part # gre10158209

The Supreme SP cat-back exhaust for the 9th generation (FG/FB) Honda Civic Si features the signature GReddy layout, styling and sound, with new revised piping diameter. It is designed to be compatible with both Si models; sedan (using the optional 11050108 adapter). The straight-through resonator and specially-made oval muffler with off-set extended tip allows the system to follow the Civics’ bodies lines and help reduce drone and high pitch frequencies.

  • Honda Civic Si [FG4 - Coupe] (2012, 2013, 2014, 2015)
  • Honda Civic Si [FB6 - Sedan]*** (2012, 2013, 2014, 2015)

***It is also designed to be compatible with the Sedan Si models via the optional 11050108 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 with 11050108 adapter)
  • Chassis: FG4 (FB6 with adapter)
  • Engine: K24
  • Type: cat-back exhaust system
  • Number of pieces: 3 pieces
  • Piping: 63.5 mm (2.5")
  • Tip: 102 mm (4.0 ")
  • Gasket(s): 2.5 " oval x2
  • Weight: 28.0 lbs (Stock weight 30.8 lbs)
  • Sound level: 94.0 dB(a)
  • Power: +11 whp / +2 ft-lbs

Customer Reviews

Customer Questions


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.

All international orders outside of the USA are subject to duties and taxes 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.


Alert: ShopLock Protection Activated


This website does not allow visitors to copy text or images for their own personal or business use without prior permission. Future attempts to copy will be logged and you may be blocked from accessing the website.

If you would like to use the text or images found on this website on your website or blog, please contact the store owner using the button below to make a formal request for approval.

Contact Store Owner