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Best Impreza mods for beginners

Easiest and cheapest first.

ModGainCostDifficultyTime
Cold air intake+3–8 whp$280–$420Easy1–1.5 hrs
Spark plugsRestores lost power$40–$95Medium1–2 hrs
Brake pads + fluidFirmer pedal$180–$260Medium2–3 hrs
Rear sway barLess body roll$300–$360Medium1–2 hrs
Cat-back exhaust+2–6 whp$450–$800Medium1–2 hrs
Lowering springsStance + less roll$300–$350Hard4–6 hrs
CoiloversHandling + stance$1,195–$1,300Hard4–6 hrs

HP numbers are wheel-horsepower estimates.