i have been looking to go a litter bigger on a generator for my house. i currently have ( for 13 years) a craftsman 4200 watt made by generac. i have a transfer switch wired to my garage so it is pretty simple deal to plug in when needed. i was looking at home depot ridgid generator (8000 watt)with a subaru ex40 engine. i just talked myself into it would be alright that it does not have a oil filter on the engine but now i just looked at what type of air filter it takes and did a search for one. i can only find one dealer on the entire web that carries one for just over 20 bucks. the cost doesn't concern me as much as the availability. i did not look at home depot for the air filter. it is a pretty small section. they do not carry any air filters for any of my husqvarna or briggs engines. any one work at a shop that can cross reference part 20B-32610-H7. that is the air filter for the ex40 subaru engine. thanks, MERRY CHRISTMAS eveyone