It would be a great help if you could give us the Fram number of this round air filter you made oval, to fit a Jetfire air cleaner canister. I have reviewed all the Fram filters by size (Fram-on line catalog available as a .PDF) and nothing is even close?? The original paper air filter is AC Brand A146C. If I were to duplicate this air filter with a round one and squash it to be oval and fit the air cleaner canister, it would need to be 7.9″ to 8.0″ inside diameter and about 9.75″ outside diameter as a round air filter.It should be about 4.5″ tall to seal in the air cleaner canister.
Would you please take yours out and find the Fram number. This could help all Jetfire owners.