As most of you may already know, the fittings that come with the FRPP trans cooler (and, as I understand the B&M cooler) do not fit! After a lot of search I found a fitting at Summit Racing, # DER-13024 ($7.99). Installed it today and it works! BTW, on my car (2001 GT) the return line is really 3/8 and not 5/16 as some have claimed in this forum...