Best Performance Upgrades for Subaru WRX and STI in Canada
The Subaru WRX and STI have one of the most passionate enthusiast communities in Canada. The symmetrical AWD, turbocharged boxer engine, and motorsport heritage make them a natural starting point for a performance build. MyPartsGuy.ca carries the parts to take it further, all priced in CAD with no duties or brokerage fees.
Essential First Upgrades
- Air/Oil Separator: The single most recommended preventive upgrade for any EJ-powered Subaru. Crawford Performance and Radium Engineering both make excellent AOS systems that prevent oil vapour from fouling the intercooler and intake. Do this before any power upgrades.
- Cold Air Intake: GrimmSpeed, aFe Power, and Injen all make strong intake options for WRX and STI platforms.
- Downpipe: One of the highest-impact bolt-ons for a turbocharged Subaru. GrimmSpeed and Invidia both make popular catted downpipes — the right choice for street use in Canada.
Suspension
- Coilovers: KW Variant 3, BC Racing BR Series, and Fortune Auto 500 Series are all strong choices. Fortune Auto has a devoted Subaru following for their build-to-order springs and quality internals.
- Whiteline Sway Bars and Bushings: Among the most cost-effective handling improvements available for WRX and STI. The factory rubber bushings are a weak point under performance use.
Brakes
The STI's Brembo brakes are strong from the factory. For track use, upgrade pads to Hawk DTC-60 or Carbotech XP10. WRX owners benefit from a StopTech Sport big brake kit upgrade.
ECU Tuning
COBB Accessport is the most common tuning platform for WRX and STI, supporting off-the-shelf Stage 1 and Stage 2 maps and custom dyno tunes. Ensure your tuner has specific Subaru experience before booking.
Canadian Advantage
Subaru performance parts from US retailers come with duties and brokerage fees. MyPartsGuy.ca stocks WRX and STI parts with Canadian pricing and no import surprises.