Wiseco Subaru EJ257 WRX/STI 4v Dish -19cc 99.5 Piston Shelf Stock Kit

SKU: WISK598M995AP

Pistons

WIS Piston Sets - 4 Cyl...

Wiseco

Wiseco Subaru EJ257 WRX/STI 4v Dish -19cc 99.5 Piston Shelf Stock Kit

SKU: WISK598M995AP

Pistons

WIS Piston Sets - 4 Cyl...

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Description

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.

Application Summary

Subaru EJ257 2.5L 16V

Part Type

Engine Piston Set

Data: v4.2 - Upd: 2026-10-14 16:45:45

Features

ArmorGlide Skirt Coating: seizure resistant, friction reduction, and quieter operation
Designed and built to withstand heavy to severe duty performance applications
Engineered, forged, and machined in the USA from 2618 aluminum for improved tensile strength
Forced pin oiling
Fully machined crown features
Precision ring grooves, anti-detonation groove, and additional ring seal improving features

Specifications

Product Attributes - UPC: 00193564076571
Product Attributes - Brand: Wiseco
Product Attributes - Notes: Fits EJ257 and WRXEJ255 engines.
Product Attributes - Stroke: 3.110 in.
Product Attributes - Gapless: No
Product Attributes - File Fit: No
Product Attributes - Quantity: Sold as a kit.
Product Attributes - Bore (mm): 99.500mm
Product Attributes - Part Type: Pistons
Product Attributes - Bore (in.): 3.917 in.
Product Attributes - Rod Length: 5.137 in.
Product Attributes - Piston Style: Dish, with four valve reliefs
Product Attributes - Product Line: Wiseco Sport Compact Piston and Ring Kits
Product Attributes - Piston Material: Forged aluminum
Product Attributes - Wrist Pin Style: Press-fit or floating
Product Attributes - Oil Ring Tension: Standard
Product Attributes - Oil Ring Material: Chrome plated carbon steel
Product Attributes - Top Ring Material: Steel
Product Attributes - Oil Ring Thickness: 2.0mm
Product Attributes - Pin Diameter (in.): 0.905 in.
Product Attributes - Top Ring Thickness: 1.25mm
Product Attributes - Wrist Pin Included: Yes
Product Attributes - Second Ring Material: Cast iron
Product Attributes - Piston Rings Included: Yes
Product Attributes - Second Ring Thickness: 1.5mm
Product Attributes - Piston Head Volume (cc): +19.00cc
Product Attributes - Compression Height (in.): 1.209 in.
Product Attributes - Top Ring Facing Material: Gas nitrided
Product Attributes - Manufacturer's Part Number: K598M995AP
Product Attributes - Second Ring Facing Material: Phosphate coated
Product Attributes - Wrist Pin Retainers Included: Yes

Reference Information

Brand Name/s	Wiseco
StreetFX SKU	wisK598M995AP
SFX Item ID	4063380
Supplier Item Code	4063380
Manufacturer SKU	K598M995AP
Manufacturer UPC	193564076571
Alternative References	EJ257, -19cc