BP400 Short Block


Our BP400 Stage 1 short block is a great option for any Subaru enthusiast, whether you want a 400 BHP race car or you’re just looking to prevent ring land issues in your daily driver


We use brand-new OEM EJ257 case halves and crankshafts, paired with forged JE pistons & OEM STi connecting rods using ACL or King main & rod bearings. Short blocks are built in our dedicated clean facility, and long block assembly is also available.


Brown’s Performance stands behind all of our products, offering a limited warranty with every engine.


BP400 Stage 1 Short Block Features:

-New OEM STi Block Halves

-New OEM STi Crankshaft

-JE 99.5mm Forged Pistons w/ Rings (8.5:1 CR on D25 Cylinder heads (EJ255) or 8.2:1 CR on B,25 V25 and W25 EJ257 heads with OEM gasket)

-New OEM STi Connecting Rods

-ACL or King Race Bearings

-Blackstone Labs Oil Test Kits (2x)


-Recommended for up to 400 BHP


Warranty Information: 

Brown’s Performance short blocks include a 12 month/12,000 Mile limited warranty, pending engine registration with proof of professional installation & proper maintenance.

We provide two prepaid oil analysis kits from Blackstone laboratories; samples should be taken during the break-in period at 50 and 500 miles. Warranty will be voided if these are not utilized.

Giveaway promotion is limited to one Killerb Oil Pickup and one set of Brown’s Performance silicone radiator hoses to the 1st person to place an order through our website. No Exceptions!

Additional information

Weight 100 lbs
Dimensions 19 × 18 × 18 in