The MERCURY TRACER 1991-1999 performance chip we offer will substantially increase the performance of your engine. Make your MERCURY TRACER 1991-1999 more powerful and more responsive with MERCURY TRACER 1991-1999 performance chips. Adding these MERCURY TRACER 1991-1999 performance chip and performance parts to your vehicle within minutes. It is not uncommon for your vehicle to gain 25 – 50 horsepower, increased throttle response, and increased efficiency on your MERCURY TRACER 1991-1999. The performance chip listed here are specially designed for your vehicle and all are custom to your MERCURY TRACER 1991-1999.