Hi, I know there was some interest in this earlier. So I wanted to let everyone know that Marty Maier of the Mid-State DeLorean Club now has an adapter kit available to allow the use of a K&N air filter in the stock air box. No modification is needed. The kit allows the filter to seal tightly and avoids the problem of un-filtered air getting around the edge of the filter. Check http://www.midstatedmc.com/ under the Parts area for a full description and pricing. Other parts, such as an AC Delco alternator conversion kit, and a shock kit are also available on the web site. Since this is just some of our members selling a few parts and not a commercial operation, we do not have on-line ordering. Thanks!! Mark Noeltner VIN 6820