From our Stage 1 Street Block to our Podium Series Stage 5, our Subaru EJ257 Short Blocks are engineered to provide performance, reliability and value. With quality as our top priority, you can expect a real peace of mind and truly enjoy driving your WRX, STi or Legacy. Our Boxers power some incredible Subaru's all over the world and we look forward to building you a great motor.

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Mazworx Stage 2 Short Block - FA20 evo, cp, sleeved block, mitsubishi, mitsubishi evo, evo block, evo shortblock, built evo block, built 4b11t, built 4b11, built evo x motor, sleeved evo motor, lancer motor, built lancer motor, stage 1 evo motor, stage 1 evo motor, stage 1 lancer motor
Retail: $5,906.95
Price: $5,611.95
Availability: Built to Order 3-4
Mazworx Item #: FA20 S2 SB -

Our Built FA20 Stage 2 shortblock is ideal for anyone looking to really push their rotated turbo kit. We use Manley Turbo Tuff connecting rods in able to hold up to the added force of higher boost. Our Darton Sleeved FA20 block is the base of the beast and our proprietary sleeving process allows for the peace of mind that you want in your build. The Mazworx Stage 2 FA20 is built with the following components:-NEW OEM FA20 Block-NEW OEM Forged FA20 Crankshaft-Proprietary, Mazworx Sleeving...

Mazworx Stage 1 Short Block - FA20 evo, cp, sleeved block, mitsubishi, mitsubishi evo, evo block, evo shortblock, built evo block, built 4b11t, built 4b11, built evo x motor, sleeved evo motor, lancer motor, built lancer motor, stage 1 evo motor, stage 1 evo motor, stage 1 lancer motor
Retail: $4,061.75
Price: $3,859.95
Availability: Built to Order 3-4
Mazworx Item #: FA20 S1 SB -

Our Stage 1 Short Block is ideal for your BRZ. Your new short block is built from a brand new case from Subaru to ensure the highest of quality. We rate our Stage 1 Short Block up to about 500hp. Each block is cleaned, inspected, machined and built, IN-HOUSE. If you're suffering from a lost ringland or bearing failure, this is an excellent solution for you. The Mazworx Stage 1 FA20 is built with the following components:-NEW OEM FA20 Block-NEW OEM Forged FA20 Crankshaft-CP 86mm Forged...

Mazworx Podium Series EJ257 WRX STi LGT STI, WRX, STI BLOCK, WRX BLOCK, STI STAGE 4 BLOCK, WRX RACE BLOCK, STI RACE BLOCK, WRX RACE BLOCK, STI RACE BLOCK, WRX RACE BLOCK, SLEEVED BLOCK, SLEEVED STI BLOCK, SLEEVED WRX BLOCK, BUILT STI BLOCK, BUILT WRX BLOCK, SUBARU RACE MOTOR, STI RACE MOTOR, WRX RACE MOTOR, FULL RACE WRX MOTOR, FULL RACE STI MOTOR, EJ257 RACE MOTOR, BUILT STI BLOCK, BUILT STI MOTOR, BUILT WRX BLOCK, BUILT WRX MOTOR
Retail: $6,299.00
Price: $6,185.00
Availability: Built to Order 3-4
Mazworx

Mazworx has been building motors for race teams all over the world for over a decade. Our unique experience allows us to offer a race motor that is truly designed and engineered to withstand the rigorous stresses that a motor will endure in competition. Our Podium Series block offers several unique modifications that help remedy a short coming of a standard motor in a RACE application. New OEM Block Halves New Forged OEM Crankshaft (Billet Stroker Options Available) Custom Pistons with X Brace...

Mazworx Stage 4 Short Block - STi / WRX / LGT STI, WRX, STI BLOCK, WRX BLOCK, STI STAGE 4 BLOCK, WRX STAGE 4 BLOCK, STI STAGE 4 BLOCK, WRX STAGE 4 BLOCK, STI RACE BLOCK, WRX RACE BLOCK, SLEEVED BLOCK, SLEEVED STI BLOCK, SLEEVED WRX BLOCK, BUILT STI BLOCK, BUILT WRX BLOCK
Retail: $5,723.43
Price: $5,410.00
Availability: Built to Order 1-2
Mazworx Item #: EJ25 S4 SB -

Our Built STi Stage 4 shortblock is ideal for anyone looking to really push their rotated turbo kit. This built sti block is built, in house and designed to help handle upwards of 650hp. We use the lighter, Manley H Tuff connecting rods in able to hold up to the added force of higher boost. Our Darton Sleeved STi block is the base of the beast and our proprietary sleeving process allows for the peace of mind that you want in your build. The Mazworx Stage 4 EJ257 is built with the following...

Mazworx Stage 3 Short Block - STi / WRX / LGT sti, wrx, cp, sleeved block, subaru, subaru sti, sti block, sti shortblock, built sti block, built ej257, built ej, built sti motor, sleeved sti motor, wrx motor, built wrx motor, stage 3 sti motor, stage 3 wrx motor, stage 3 legacy motor, carrillo pro-sa rods, sti carrillow rods, wrx carrillo rods
Retail: $4,535.00
Price: $4,493.00
Availability: Built to Order 1-2
Mazworx Item #: EJ25 S3 SB -

Our Subaru Stage 3 Shortblock is for those that want to push the stock sleeves to their limit. We utilize many of the same components as the lower blocks but build with the Carrillo Pro-SA Rods with the WMC bolts. These are some of the most tried and tested rods in the industry and offer superior finish quality that nets real peace of mind. While the components used are capable of handling far more, we really insist on capping this block at 500-550hp as the cylinder walls will be your weak...

Mazworx Stage 2 Short Block - STi / WRX / LGT sti, wrx, cp, sleeved block, subaru, subaru sti, sti block, sti shortblock, built sti block, built ej257, built ej, built sti motor, sleeved sti motor, wrx motor, built wrx motor, stage 2 sti motor, stage 2 wrx motor, stage 2 legacy motor, manley h tuff rods, sti h tuff rods, wrx h tuff rods
Retail: $4,194.00
Price: $4,152.00
Availability: Built to Order 3-4
Mazworx Item #: EJ25 S2 SB -

The Mazworx Stage 2 Sti Shortblock is designed to help maximize the power of your Rotated Turbo Kit. If you're pushing a Large Bolt On to a GTX35R, this is a great block for you. We rate this at roughly 650hp thanks to the Manley H Tuff Connecting Rods. These sturdier rods will take more use and abuse than the typical H-Beam and we add a few other, proprietary tweaks to help you enjoy your 600hp! The Mazworx Stage 2 EJ257 is built with the following components:- NEW OEM EJ257 Block- NEW OEM...

Mazworx Stage 1 Short Block - STi / WRX / LGT evo, cp, sleeved block, mitsubishi, mitsubishi evo, evo block, evo shortblock, built evo block, built 4b11t, built 4b11, built evo x motor, sleeved evo motor, lancer motor, built lancer motor, stage 1 evo motor, stage 1 evo motor, stage 1 lancer motor
Retail: $3,499.00
Price: $3,468.00
Availability: Built to Order 3-4
Mazworx Item #: EJ25 S1 SB -

Our Stage 1 Short Block is ideal for your WRX, STi or later model Legacy GT. Your new short block is built from a brand new case from Subaru to ensure the highest of quality. We rate our Stage 1 Short Block up to about 500hp. Each block is cleaned, inspected, machined and built, IN-HOUSE. If you're suffering from a lost ringland or bearing failure, this is an excellent solution for you. The Mazworx Stage 1 EJ257 is built with the following components:-NEW OEM EJ257 Block-NEW OEM...