Motion Lab ML500 2.5L EJ25 Subaru WRX/STi Pro-Built Short Block

Motion Lab ML500 2.5L EJ25 Subaru WRX/STi Pro-Built Short Block


Up to 425whp @ 7200rpm

Compression Ratio *

Hardware Seal Kit *

Subaru OEM Complete Gasket Kit

Head Stud Kit Upgrade

Timing Belt/Timing component kit

Pick-up Tube Upgrade

Oil Pump

SKU: ML500 2.5L Category: Brand:

This is our entry-level block designed to provide vehicles with light modifications superior reliability over a OEM spec shortblock. By utilizing the Manley Performance “Platinum Series” 2618 forged piston set we rectify the most common failure point of the EJ25 series of engines, cracked ring lands. Offering great value they come out of the box with a high quality chromoly 2.500”x.180” wrist pin, anti-friction skirt coating, TotalSeal ring pack, and offset wrist pin for superior performance. The ML500 spec short-block package retains OEM STi style rods are utilized with standard factory rod bolts. Fully blueprinted and assembled to our strict specifications using King XPG Race bearings in a clean climate controlled facility.

Recommended Power: Up to 425whp @ 7200rpm

  • New Subaru OEM Factory Block
    • Latest 705 casting offered by Subaru
    • OEM cylinder liners
    • Seal kit can be purchased separately (Seal kit includes: 3x wrist pin plugs, 3x wrist pin plug washers, 1x separator cover, 6x separator cover bolts, 1x wrist pin service cover, 1x wrist pin service cover O-ring, and 2x wrist pin service cover screws)
  • New Subaru OEM Induction Hardened Crankshaft
    • ML-Spec King XPG Race Main bearing clearances
  • New Subaru OEM Factory STi I-Beam rods
    • ML-Spec King XPG Race rod bearing clearances
  • Manley Performance “Platinum Series” 2618 Forged Pistons
    • Choose 8.5:1 (or) 9.8:1 Compression Ratio
    • Standard Chromoly Wrist Pins (2.500”x.180” wall)
    • Anti-friction skirt coating
    • Off-set wrist pin


Customer to pay extra for shippingPlease add product to cart for a shipping pricing.  Please call or email to arrange installation or local pickup.

Weight 110 lbs
Dimensions 20 x 20 x 20 in