OEM-PLUS
Get the reliability of an OEM Subaru short block, with an extra dose of performance, thanks to upgraded 2618 Je Forged Pistons. This option delivers peace of mind and increased power potential for your WRX, STI, LGT, FXT, or Baja.
Features:
OEM Assembled short block for perfect fitment
Upgraded 2618 Je Forged Pistons for higher power handling
Ideal for street performance builds and everyday reliability
New OEM Subaru 2.5L case halves
Assembled using OEM Subaru Crankshaft, Case Bolts, and Sealant
 
SS-500
Build a robust Subaru EJ25 engine with the SS-500 Short Block. This short block features upgraded Je Forged Pistons, H-Beam Connecting Rods, and a focus on reliability at moderate horsepower levels – perfect for street performance.
Features:
Je Forged Pistons (99.5mm, 8.5:1 C/R, 2618 Alloy)
King XPG or ACL Performance Main & Rod Bearings
H-Beam Connecting Rods (ARP 2000 Rod Bolts)
OEM Subaru 2.5L Case Halves, Measured and Assembled using a new OEM Subaru Nitride Treated 2017+ STi Crankshaft, OEM Case Bolts, and Sealant.
Rated to support 500whp
 
SS-700
Get the ultimate foundation for your high-power Subaru build with the FiP-SS-700 Short Block. This short block features a closed-deck design, forged internals, and meticulous assembly.
Features:
JE FSR Forged Pistons (2618 Alloy, 99.75mm Bore)
High Performance Main & Rod Bearings (CT-1 Coated)
H-Beam +2mm Forged Connecting Rods ( With ARP 2000 Rod Bolts)
New OEM Subaru 2.5L Case Halves (V3 Closed Deck)
New OEM Subaru Nitride Treated 2017+ STI Crankshaft
Precision blueprinting and assembly by Fi Performance
Rated to support 700whp
Important Note: This is a premium product for serious builds. Consider suggesting compatible high-performance cylinder heads, head studs, etc., that buyers might need.
 
SS-800
Push the limits of your Subaru EJ25 build with the SS-800 Short Block. This race-ready block with forged internals and meticulous assembly is ready to support extreme horsepower levels.
Features:
JE Forged Pistons with upgraded 210" wall pins (99.75mm Bore, 2618 Alloy) 
High Performance Main & Rod Bearings (CT-1 Coated)
H-Tuff +2mm Connecting Rods (ARP Hardware)
New OEM Subaru 2.5L Case Halves (Closed Deck V3 )
New OEM Subaru Nitrided 2017+ STI Crankshaft
Professionally Blueprinted and Assembled at Fi Performance
Machined to support 1/2" head studs
Rated to support 800whp
Important Note: This is a premium product for serious builds. Consider suggesting compatible high-performance cylinder heads, head studs, etc., that buyers might need.
 
All of our shortblocks are Blueprinted & assembled by Fi Performance for consistency
Usually ready in 5+ days