Sorry I did not see this sooner. The problem with filters other then the OEM is that the OEM filter has an anti-drain back valve in it. Because the Ryker oil filter is mounted high, the oil will drain out of it in short order. There are a number of filters with the same dimension out there including after market (K&N, etc.). But they do not have the anti-drain back valve and I would not recommend them for this reason. Letting the oil drain out of the filter canister means your parts will be turning for a precious amount of time with zero oil delivery as the system is busy refilling the oil filter canister. Over time this will definitely take it's toll on critical parts.