Manley Performance
Manley 04+ Subaru WRX/STi (EJ257) 99.75mm Bore 1.2mm x 1.2mm x 2.0mm +.25mm Oversized Ring Set - 46997-4
- SKU:
- MAN46997-4
- UPC:
- 807298041155
- MPN:
- 46997-4
- Availability:
- Regularly stocked product
Description
What is the intended use for these piston rings?
Manley Piston Rings are engineered for performance enthusiasts seeking maximum power and efficiency in demanding motorsport applications.
Can I install these piston rings myself?
Professional installation is strongly recommended for these advanced piston rings to ensure optimal sealing and performance.
Manley Piston Rings for 2004-2012 Subaru Impreza are designed for maximum engine performance, boasting a score of 10. Featuring premium steel and ductile iron top rings with plasma-moly inlay, these piston rings deliver superior sealing and durability. Experience unmatched power gains and efficiency with these expert-grade piston rings.
Key Features
- Premium Steel Top Rings
- Ductile Iron Top Rings with Plasma-Moly Inlay
- Napier-Style Second Rings
- Total Seal Gapless Top Ring Packages
- File Fit Options
- 99.75mm Bore 1.2mm x 1.2mm x 2.0mm +.25mm Oversized Ring Set
Why Choose the MAN Piston Rings
Delivers superior sealing for maximum power and efficiency.
Achieves enhanced durability and resistance to extreme conditions.
Provides optimal oil control for reduced blow-by and cleaner emissions.
Transforms your Subaru's engine for peak performance and reliability.
Who Is This For?
Street Performance — 8/10
Premium steel and gapless rings enhance engine output.
Track / Autocross — 8/10
Gapless top rings minimize blow-by for peak power.
Drag Racing — 9/10
Maximum horsepower claim directly benefits drag racing.
Racing Competition — 9/10
Designed for performance, eliminating blow-by for power.
Engine Performance — 10/10
Gapless rings eliminate blow-by for maximum horsepower.
Additional Resources
Important Notices
⚠️ CARB Notice: This product is NOT legal for street use in California under CARB (California Air Resources Board) regulations. For off-road or race use only.
⚠️ Proposition 65 Warning: This product can expose you to chemicals including lead and/or other substances known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.
Browse More: Shop All Piston Rings — Engine Components
Additional Information
CARB: |
This product is not CARB Legal and not for sale in California |
Clearance Item: |
N |
MPN: |
46997-4 |
Proposition 65: |
Y |
Case Lot Quantity: |
1 |
Category: |
Engine Components>Piston Rings |
Product Level: |
Premium Performance |
Street Performance: |
8/10 |
Track / Autocross: |
8/10 |
Drag Racing: |
9/10 |
Racing Competition: |
9/10 |
Engine Performance: |
10/10 |
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