Performance Associates in San Dimas California is doing a relatively simple GT modification utililizing replacement mufflers and an ignition re-calibration for a rear wheel horsepower gain of 75-100HP. It is a quick turnaround $12-$1500 job with a huge gain to the wheels. There is no significant increase in sound from the exhaust system to ruin your driving pleasure.
Those interested can contact Randy at (909) 592-4441 or pahorsepower@earthlink.net.
Those interested can contact Randy at (909) 592-4441 or pahorsepower@earthlink.net.