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Engines and Components› Pistons and Piston Rings
Wiseco
Wiseco Subaru EJ257 WRX/STI 4v Dish -19cc 100mm Piston Shelf Stock Kit
SKU: W00C K598M100
Advanced — 4+ hours
Overview
The design also incorporates forced pin oiling, making them suitable for heavy to severe duty performance applications. This piston set is engineered and machined in the USA.
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Part #: K598M100
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 EJ257 Piston Set, 100.00 mm Bore, 30.70 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
- Excessive oil consumption
- Loss of power during acceleration
- Rough idle after warm-up
- Blue smoke from exhaust on startup
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
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- Wiseco vs CP pistons for EJ257
- EJ257 piston slap at cold start fix
- Can bad pistons cause P0300 code?
- Wiseco Sport Compact pistons install tips
- Replacing pistons on Subaru EJ255 cost
- Co-purchase: head gaskets and pistons for EJ
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 K598M100 |
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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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