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Street Spec Value Shortblock

Our Street Spec Value series short blocks are designed as an ideal compromise between cost and performance for less demanding applications. This revised version now features a lighter yet more detonation-resistant Cosworth "boxed strut" piston. Piston skirts are Xylan coated for reduced friction and tighter clearances. Connecting rods are a low cost Manly H-beam 4340 rod with increased strength and rigidity over the stock rods. The OEM forged and surface hardened crankshaft runs in King XPG tri-metal race series bearings.

Every short block is professionally assembled from all new components in our dedicted engine building room by our in-house builder who has 18 years of motorsport level Subaru engine experience and has built over 500 Subaru high performance engines. Every short block is blueprinted to carefully designed specifications that balance extended service life with extreme power capabilities. Every dimension is logged and a build spec sheet is provided for reference. The block is assembled with all necessary block hardware and oil separator plate.

Click here for shortblock comparison chart.

Usually ships in 4 to 5 days.

Manufacturer: RalliSpec

  • Subaru WRX STI MY15-17
  • Subaru Impreza STI MY01-14
  • Subaru Impreza WRX MY06-14
  • Subaru Legacy GT MY05-12
  • Subaru Outback XT MY05-09
  • Subaru Forester XT MY04-13
Part No. Description Displacement Price Ea. Add to Cart
RSB-SS25V RalliSpec Street Spec Value Shortblock 8.2:1CR (8.6:1 EJ255 D25) 2.5L $3250.00