I have a 92 305, and i wanna know what size my exaust pipes are? anybody know?

 

Probably 2" or 2.5". You can always always measure them with a tape measure.

 

Take a straightened wire coat hanger, or other stiff wire, and bend it into a hoop leaving a wide gap. Tweak the wire and keep trying to slip the two ends over the pipe until it just slips by. Measure the spacing, and your actual pipe size will be about 1/16" less than that. Pipe diameter is measured from the inside of the pipe.

 

awesome, thanks a bunch you guys