I Have had nothing but problems with my Quad Race box, I spoke with Jeramy, who not only bother to return my calls but acted like I never spoke to him before. Getting codes 192 (low fuel pressure ) and 237(low boost pressure) I think they related to my BD Exhaust Brake its an 04 with a 6 speed. Hey Quad you have an answer. Jeramy said he would talk to you and never returned my call and after 3 days I called him back he acted like he never talked to me but suggested that try the trioid and that did not work. BTW my serial number is 21122.