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Street Spec Pro Shortblock

The Street Spec Pro is the next evolution in our shortblock line. It is in response to the demand for a non-sleeved Subaru block that is fully blueprinted and balanced for more serious trackday and extreme street performance applications. The Pro version builds on the Street Spec standard unit with the addition of precision dynamic crankshaft balancing and blueprinting of the cylinder bore dimensions by going to an oversized bore. Every shortblock dimension and specification is logged and a detailed build sheet is provided with each serialized shortblock.

Click here for shortblock comparison chart.

Usually ships in 1 to 2 weeks.

Manufacturer: RalliSpec


  • Subaru
Part No. Description Displacement Price Ea. Add to Cart
RSB-SS25P RalliSpec Street Spec Pro Shortblock 8.2:1 2.5L $4250.00
RSB-SS25PHC RalliSpec Street Spec Standard Shortblock 9.2:1 2.5L $4250.00