The outside diameter is different. The 113 is NOT a bored out 110 cylinder. No offense to 113 owners but I'd do 4.125 Axtell cylinders before those 4.060's. They've been shown time and again to not be very good, tapers, barrels, etc. The Axtell is much more stable and you're boring the case anyway for a 113. Just my opinion, I could be wrong
