I think catoiler had some opinions on these converters, cant remember for sure though. I saw their ad on the internet, but ended up going with a different company. They seemed knowledgeable, but I got the idea they didnt understand that I really did intend to make 550 horsepower with my truck. Warranty was not as good as ATS/DTT/Suncoast. On another note, I have seen the trans work that Valco (parent Co. of Mojave Green) does. They rebuilt a friends P-Stroke, and it held up very well. Good Luck