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K1 SUBARU. EJ-25. 83mm Dual Thrust C/Shaft

Stock Code:
039ADD830
Stock Level
In Stock
$2,885.83
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K1 - Billet Crankshaft

K1 Technologies 039ADD830

Application: Subaru EJ25 engine series — typically used in high‑performance or stroker EJ25 builds (e.g., WRX/STI, Forester XT, Liberty).

Key Specs:

  • Engine Compatibility: Subaru EJ25 (2.5 L boxer engine platform)

  • Stroke: 83.00 mm — this makes it a stroker crank compared to standard EJ25 stroker options.

  • Material: Billet 4340 steel for high strength.

  • Main Journal Diameter: 60.00 mm 

  • Rod Journal Diameter: 52.00 mm 

  • Flange Type: 8‑bolt crank flange (fits typical Subaru EJ flywheels/flexplates). 

  • Rear Main Seal: 1‑piece style (OEM configuration). 

  • Finish & Treatment: Core hardened and nitride hardened for strength, with magnetic particle testing for flaw detection. 

  • Weight: ~21 lb (about ~9.5 kg).

Overview:
This crankshaft is a performance‑oriented stroker crank designed for Subaru EJ25 engines where an increased stroke (83 mm) is desired — typically producing higher displacement and torque potential when paired with matching rods and pistons.

Fitment Note:
The 83 mm stroke crank is commonly selected for stroker builds (e.g., EJ257 or custom EJ25 builds) and will require the appropriate connecting rods and pistons to match the stroke and compression goals.