i just put the original e xhaust back on th3 550. love the sound or lack of sound. my Tubis were put on back in 05 by an east coast dealer and say 550 on the outside. i left them with my mechanic and he said that someon e will likely buy . dont know fair price ? they are working fine, but want the car totally stock and entering at Monterey in August. sorry for tupos, writing on IPAD on plane.
