If I'm not mistaken doesn't the lower part of the air box (where the round opening is that goes over the Throttle body) snap together to the top portion? If so then you could make the top portion and the Air filter box out of Stainless steel and re-use the plastic lower portion of the OEM one. That way you will be sure of an airtight fit. On another note, I believe Marty Maier sells a K&N filter kit that comes with the closest match to the OEM filter along with a Stainless steel (?) adapter that goes into the air filter box to adapt the K&N filter. I'm not sure if he still sells this or not. Steve --- In dmcnews@xxxx, "Walter" <Whalt@xxxx> wrote: > Skipper, > > If you really want to make a hot selling upgrade for the DeLorean, have your > stainless fabricator make an air filter box out of stainless that is > basically shaped like the OEM but will hold the closest K&N filter > available. Make it with twist lock stainless latches to hold it closed. > > I thought about this before, but I think it would be difficult to make the > round lower portion of the air box out of sheet metal and make it so that it > would fit tight without leaking. I think it would be tricky to make the > flange perfectly round. The next time I see my stainless guy, (I'm in the > restaurant equipment business) I'll show him my air box and ask him what it > would cost to make several out of stainless. That is unless you beat me to > it. But relax, I'm incredibly slow at such things. > > By the way, can anyone say what the closest sizes of the K&N air filters are > that would be appropriate to consider using? Such as what is the next few > sizes too large and too small? I think I would rather go a speck larger > just for general principle's sake. > > Walt Tampa, FL