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Engines and Components› Pistons and Piston Rings
Wiseco
Wiseco Subaru WRX EJ20 STROKER 1.181CH Piston Shelf Stock Kit
SKU: W00C K579M925
Advanced — 4+ hours
Overview
Constructed from 2618 aluminum, they are engineered for heavy to severe duty race applications. The pistons include a ring set and floating wrist pins, and come with an ArmorGlide skirt coating for reduced friction and quieter operation.
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Part #: K579M925
Professional Series forged racing pistons from Wiseco are no-expense-spared pistons designed for the serious racers and builders. Packed full of custom-level performance and durability features and provided with premium rings, Professional Series pistons are designed and built for use in heavy to severe duty race builds. Remove your limits with Wiseco s Professional Series.
Features:
- Engineered, forged, and machined in the USA from 2618 aluminum for improved tensile strength
- ArmorGlide Skirt Coating: seizure resistant, friction reduction, and quieter operation
- Fully machined crown features
- Precision ring grooves, anti-detonation groove, and additional ring seal improving features
- Forced pin oiling
- Designed and built to withstand heavy to severe duty performance applications
Wiseco Subaru EJ20 Piston Set, 92.50 mm Bore, 30.00 mm Compression Height, 0.9055 in. Pin Diameter, Sport Compact, Set of 4.
This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
Vehicle Symptoms
- Engine knocking under load
- Loss of compression in one cylinder
- Excessive oil consumption
- Rough idle and misfire at high RPM
- Metal shavings in oil after track day
Diagnostic Codes
- P0300 – Random or multiple cylinder misfire Det
- P0301 – Cylinder 1 misfire Det
- P0302 – Cylinder 2 misfire Det
- P0303 – Cylinder 3 misfire Det
- P0304 – Cylinder 4 misfire Det
Relevant Conversations
- Wiseco K579M925 for 93-98 Subaru WRX EJ20
- EJ20 forged piston upgrade kit
- Wiseco Sport Compact piston review
- P0301 misfire after rebuild - piston damage?
- Best pistons for 400hp EJ20 build
- Wiseco vs CP pistons for Subaru EJ20
- How to install Wiseco pistons EJ20
- EJ20 low compression fix piston replacement
- ArmorGlide coated pistons benefits
- Wiseco piston kit for boosted EJ20
Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
Fitment
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Specifications
| Brand | Wiseco |
| Part Number | W00C K579M925 |
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Returns & Fitment
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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