Beyond happy with my Cat overhaul and FINE tuning !!!!! And my Cummins has been working great thanks to TTD for years now !! And I might add my Christmas present that I won on your Facebook page even made Santa jealous haha. Overall I’ve had nothing but awesome service and the best on the road performance since I’ve meet Chris about 5 years ago that’s why I recommend him and his team to everyone I talk too, and I think he finds my on the road stories funny or amazing hahaha . I take pride in my trucks and so does TTD , that’s why not only as a business but as a friend I choose da by’s !!!!!