My friends 95 gt 5 spd is really low on power. It pulls ok at best off the line, no second gear scratch, then gets beat by 99 v6 convertible with three large people in it. We checked the plugs, and it appears to be running lean. The only mods done are flowmaster 3 chamber mufflers on stock exhaust system, and we installed some 3.73 gears in it in the fall. It runs smooth, gets decent mileage, really don't know why it's so low on power.