good thing about Andrews cams , they are 1 peice ! I was wondering how long those NEW cams would last , LOL ! The 255 cams I took out of my bike {2007 CVO Springer} was 1 piece ,they are also made by Andrews ,I put in the Andrews 32s. I have a 'tiny' little leak on both cyl. with 5500 miles ,and will have the local H-D shop pull my heads {free} as I am 'buds' with the mechanics ,and then I will do some head porting. Been porting H-D heads for 30 years , sold my porting biz, but in the contract ,it didn't say I couldn't port my own heads. LOL. I personally like the 110 heads and have a .030 Cometic hg waiting ,and will 'FIX' the cyls with 3 8x32 set screws that are 1/4 inch long , drill and tap right in the center of sleeve and cyl. 1/2 of the thread will be in alum, and 1/2 will be in metal , liner WILL NOT MOVE , trust me. Remember the 'spiney lock' sleeves ? Those days are long gone , for severals years , the outside of the sleeve is smooth as a babys butt. Dewey