Description: 1.8L Supercharger (Manual) 2003 Matrix (XR, Base); Corolla The new 1.8L Supercharger offers up to a 35% increase in power and torque and an additional 7.5 lbs of boost. The bolt-on unit is integrally cast and is equipped with new efficiency and performance enhancing features, such as a race-inspired supplemental injector for enhanced full throttle performance and an internal bypass(more)

Description: 1.8L Supercharger (Manual) 2003 Matrix (XR, Base); Corolla The new 1.8L Supercharger offers up to a 35% increase in power and torque and an additional 7.5 lbs of boost. The bolt-on unit is integrally cast and is equipped with new efficiency and performance enhancing features, such as a race-inspired supplemental injector for enhanced full throttle performance and an internal bypass circuit for fuel efficiency and smoother operation at low speeds. Peak torque is 145 lb.-ft. supercharged @ 4000 RPM vs. 125 lb.-ft. stock at 4200 RPM. Peak horsepower is 166 HP supercharged @ 6800 RPM vs. 130 HP @ 6000 RPM. For additional performance specifications, including 0-60 and mile acceleration times, log onto www.trdhotwired.com. As with TRDs 4.7L V8 Supercharger, this unit also features the new exclusive TRD Engine Management System engineered to provide peak engine performance Excerpt From Forums It comes out to around $4200 nowadays with the recent increase in price of the sc. It is not a direct bolt on and requires a new throttle body, a new belt, a new hood, and e-manage with harnesses (or powerfc) with very good tuning. I gained a 40 percent increase in horsepower and torque but expect about a 42 whp increase. It is strongly suggested you do your research before purchasing this kit. (minimize)