Today at school we had a cook out and I went over to diesel to hand out. The teacher locked his keys in truck and I had a slim Jim so I got it back open for him. I saw a 6637 filter on top of one of their test motors and asked about it. He said you want it take it. It's alil crushed where the engine they put it on was too big. I got the dents out and planning on putting on after I get out of my home school.