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Vehicle-specific research for understanding engines, diagnosing problems, planning maintenance, and choosing modifications that fit.

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49 guides Subaru WRX / STI Engines, reliability, maintenance, tuning, and chassis-specific upgrades. Explore guides 9 guides BRZ / FR-S / 86 Handling, forced induction, exhaust, tires, and driver-focused upgrades. Explore guides 4 guides Nissan 350Z Z33 suspension, exhaust, tires, and VQ35DE engine guides. Explore guides 4 guides Nissan 370Z Z34 suspension, exhaust, tires, and VQ37VHR engine guides. Explore guides 2 guides Subaru Crosstrek Tires, lift kits, and practical upgrades for street and trail use. Explore guides

Blue 2022 Subaru WRX parked on a mountain road

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The WRX knowledge base

Follow the Subaru WRX from its EJ-powered generations through the FA20DIT and FA24DIT. Our growing library connects engine identification, common problems, service planning, tuning, and fitment-specific upgrades.

Explore all 49 WRX guides

01 Understand Your Engine Identify the engine in each generation and follow the right technical guides. Start here 02 Research Reliability Compare common problems by model year before buying or diagnosing a WRX. Start here 03 Plan Maintenance Build a service plan around the correct generation, engine, and transmission. Start here 04 Choose Modifications Browse fitment-specific performance, handling, and appearance guides. Start here

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Move between vehicles through the systems and decisions that matter.

01 Engines Specifications, variants, applications, and known problem areas. 02 Maintenance & Reliability Service planning, ownership costs, and model-specific reliability. 03 Tuning Calibration methods, supporting hardware, fuel, and power paths. 04 Handling Suspension, alignment, brakes, wheels, and tires for the intended use. 05 Intake & Exhaust Fitment, sound, tuning requirements, and practical tradeoffs. 06 Auto Detailing Paint correction, washing, drying, and protection guides.

Selected guides

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Cornerstone references for understanding the platform before replacing parts or changing the calibration.

White 2022 Subaru WRX viewed from the front and side

Start here

Subaru WRX Engine Guide: EJ205, EJ255, EJ257, FA20, and FA24

Identify the engine in a Subaru WRX or STI, compare the EJ205, EJ255, EJ257, FA20DIT, and FA24DIT, and find the right reliability, maintenance, and diagnostic guide.

Read the guide

Three Subaru WRX cars parked in front of a mountain landscape

Subaru WRX Reliability by Year: Common Problems and What to Check

How reliable is the Subaru WRX? Compare EJ, FA20, and FA24 generations, common problems, modified-car risks, maintenance priorities, and the checks that matter before buying.

FA24F turbocharged engine in a 2019 Subaru Ascent

Subaru FA24 Engine Guide: FA24F vs. FA24D, Specs, and Reliability

Compare Subaru FA24F and FA24D engines, including specifications, vehicle applications, fuel systems, turbocharging, reliability, and replacement-engine compatibility.