Subaru WRX Stage 1 Build — Under $2,000

The WRX comes turbocharged from the factory, which means the cheapest horsepower in the business is hiding in the ECU. Here's the proven Stage 1 recipe the Subaru community has refined for two decades.

The Parts List

1. Accessport or Open-Source Tune — $650–700

The Cobb Accessport V3 is the gold standard: flash a Stage 1 map in your driveway in 15 minutes. +25–40 hp / +40–60 lb-ft on 91+ octane, completely stock hardware.

2. High-Flow Panel Filter — $60–80

Stage 1 maps are designed for the stock intake, so keep it — just drop in a quality filter.

3. Turbo Inlet Hose — $150–250

The stock accordion-style inlet collapses under boost on EJ-powered cars. A silicone inlet is cheap insurance and frees the turbo to breathe.

4. Cat-Back Exhaust — $600–900

The classic Subaru rumble. Quality cat-backs keep the boxer burble without drone on the highway.

5. Shifter Bushings + Short Throw — $100–150

Doesn't add power, but transforms the notchy factory shifter into something you actually enjoy rowing.

Total: $1,560–2,080

What You End Up With

A WRX that makes roughly 290–310 crank hp, pulls noticeably harder everywhere in the rev range, sounds like a proper rally car, and is still 100% daily-drivable with full reliability — as long as you feed it good gas.

The Golden Rules of Boxer Ownership

1. 91 octane minimum, always. Knock kills EJ and FA motors.

2. Warm it up before boost. Boxer engines are hard on oil; let it reach temp.

3. Check oil every other fill-up. Subarus consume oil; running low is the #1 killer.

Stage 2 Preview

Downpipe + Stage 2 tune is the next big jump (+30–40 hp more), then you're shopping for a bigger turbo and we should talk fuel system.