Cosworth Piston Ring Set 99.5mm Bore - Subaru EJ25 Turbo Models (inc. 2006-2014 WRX / 2004+ STI)
Manufacturer Part # 20001515
RallySport Direct is your #1 source for high-performance components brought to you by Cosworth. Cosworth has established their brand with over 50 years of experience, design, and racing heritage.
On this page, you are looking at the Cosworth Piston Ring Set. This is a great option for those of you looking for a solid and proven product when rebuilding your engine.
Here are the details:
- Full set of piston rings
- 99.5mm bore
- Tungsten coated stainless steel top ring with increased ring tension to reduce blowby at increased engine speed and combustion pressure
- Designed and validated for use in racing and road engines such as the Formula Atlantic and Caterham CSR260
- Includes a set of 4 top rings, 2nd rings and oil control rings
- Note that these will only fit Cosworth pistons
For use with Cosworth Piston Part Number 20003674 only.
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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.
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QUESTIONS & ANSWERS
Q: Ring gap? Allen Lish 3 years agoAnswer
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. 3 years ago
Q: ej251 elizondj5 4 years agoAnswer
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. 4 years ago