The fuel pump is one of the most overlooked upgrades on a WRX or STI build until it becomes the restriction point. As power increases and fuel demand rises, the stock pump…
The STI is one of the most capable platforms to build from and one of the most commonly over-built too fast. Owners jump to turbo upgrades and engine work before the bolt-on…
The stock STI turbo is one of the most capable factory turbos fitted to a performance car. It spools quickly, delivers strong mid-range power, and responds well to tune-based gains before needing…
The most expensive mistakes in WRX and STI builds happen before anything goes in the car. Wrong short block for the power goal. Wrong turbo for the platform. Supporting mods skipped because…
The FA24F turbo upgrade market for the 2022 and newer WRX has been limited until now. Most turbo options for the FA24 platform require sourcing components separately and piecing together a kit.…
The FA24 is the engine powering the 2022 and newer Subaru WRX and one of the most common questions from owners planning a build is simple: how much power does it actually…
The COBB flex fuel kit is the most popular way to run E85 properly on the WRX and STI. It adds an ethanol content sensor to the fuel system that communicates with…
The Subaru Forester XT is one of the most underestimated performance platforms in the Subaru lineup. It runs the EJ25 turbo engine — the same forced induction foundation as the WRX and…
Closed deck is one of the most used terms in WRX and STI build conversations and one of the least explained. Most owners know it means a stronger engine. Few know exactly…
The Boost Lab TD06SL2-54X is one of the most capable bolt-on turbo upgrades available for the WRX and STI platform. It delivers serious power without requiring a custom turbo manifold or an…
OLM makes the best exterior upgrades for the WRX and STI because the lineup covers the full car in a consistent design language. Front lip, rear spoiler, under-hood details, mirror covers —…
BC Racing Swift Springs are one of the most searched BC Racing upgrades for the WRX and STI and one of the least understood. Most owners know they exist but are not…
The most common WRX and STI build mistake is buying mods in the wrong order. A tune without supporting mods. A big turbo on a stock block. An exhaust before the fueling…
Upgraded transmission mounts are one of the least talked-about drivetrain upgrades on the WRX and STI and one of the most effective for improving shifting feel and drivetrain stability. The stock mounts…
The best clutch upgrades for the WRX and STI match the power level and how the car is driven. The stock clutch handles factory power well. As boost and torque increase, it…