[Shane@DBPerformance]

I just took a look at it and it doesn't really look like it was a knock/detonation problem. The 3 other cylinders look mint, there isn't aluminum build up in the combustion chamber of the cylinder that took a shit, all the spark plugs look fine except for the one being covered in oil in the bad cylinder.

Rod bolts usually will usually break/stretch from high RPMs when the pistons pull on them on the up stroke and rods usually bend on the down/compression stroke or on the up stroke when you suck in water/blow a HG and fill the cylinder with coolant.