Cosworth Piston Ring Set 99.5mm

Part #: COS1 20001515

$99.00



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Out of Stock
Orders placed today should ship by 06/06/2016




CONFIRM FITMENT



SPECS


Brand: Cosworth
Bore Size: 99.5mm
QTY: 4 Sets
Mfgr. Warranty: No Warranty
Return Policy:

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Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.

RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.

The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.
Standard

CONFIRMED FITMENT


Subaru Impreza
WRX STI 2004, 2005, 2006, 2007WRX STI Limited 2007WRX STI Hatchback 2008, 2009, 2010, 2011, 2012, 2013, 2014WRX STI Special Edition Hatchback 2010WRX STI Limited Sedan 2011, 2012, 2013, 2014WRX STI Limited Hatchback 2011, 2012, 2013, 2014WRX STI Sedan 2011, 2012, 2013, 2014WRX TR 2006, 2007WRX Limited 2006, 2007WRX 2006, 2007WRX Sedan 2008, 2009, 2010, 2011, 2012, 2013, 2014WRX Hatchback 2008, 2009, 2010, 2011, 2012, 2013, 2014WRX Premium Sedan 2010, 2011, 2012, 2013, 2014WRX Premium Hatchback 2010, 2011, 2012, 2013, 2014WRX Limited Sedan 2010, 2011, 2012, 2013, 2014WRX Limited Hatchback 2010, 2011, 2012, 2013, 2014
Subaru Legacy
GT Limited 2005, 2007, 2008, 2009GT 2005, 2006GT spec.B 2006, 2007, 2008, 20092.5GT 2010, 2011, 2012
Subaru Forester
XT 2004, 2005, 2009XT Premium 2005, 2010, 2011, 2012, 2013XT Limited 2006, 2007, 2008, 2009, 2010Sports 2.5 XT 2008XT Touring 2011, 2012, 2013
Subaru Outback
XT 2005, 2006XT Limited 2005, 2007, 2008, 2009
Subaru Baja
Turbo 2004, 2005, 2006
Subaru WRX STI
Base 2015Launch Edition 2015
Saab 9-2X
Aero 2006

This ring pack comprises a tungsten coated stainless steel top ring with increased ring tension to reduce blowby at increased engine speed and combustion pressure. The ring pack is Cosworth specific and has been designed and validated for use in racing and road engines such as the Formula Atlantic and Caterham CSR260. Rings can only fit with Cosworth pistons. The pack includes a set of 4 top rings, 2nd rings and oil control rings.

For use with Cosworth Piston Part Number 20003674 only.
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QUESTIONS & ANSWERS (3)

  • AnswerQ: Cosworth Forged Piston 99.5mm  gelo 2 months ago

    What is the part# of cosworth 99.5mm piston set for 2011 WRX STi Sedan? CR: 8.9 to 9.2:1 will do.


    • A: The part number for those pistons is COS1 20003682


      Nick S. 2 months ago


  • AnswerQ: Ring gap?   Allen Lish 1 year ago

    Will these rings already be gapped to proper size for an EJ25 engine?


    • A: You will be required to gap the rings for your setup.


      Nick S. 1 year ago


  • AnswerQ: ej251  elizondj5 2 years ago

    Can these rings work on the ej251 motor?


    • A: These rings will fit 99.5mm Cosworth pistons for Subaru 2.5L engines. There should be no problem using the pistons and rings on the EJ251 engine, but we cannot guarantee fitment because Cosworth does not.


      Zach G. 2 years ago


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