i have 2 of these and i love 'em i have a 3600 in a 4l80e behind a 6.0 truck motor in my 55 chevy that runs 12'0 and still gets 20mpg good people to deal with and sem to know ther stuff,i took a chance because these converters were 1\2 price compared to others, but they seem to be top notch ,i will buy from them again