107 Big Bore kits for std twin cams / H D Heads DRE Cycles Dyno / Track Proven. The item "107 Big Bore MVA/110 Domes kit 11.00CR Twin Cam Harley Drop in kit DRE Cycles" is in sale since Sunday, August 9, 2020. This item is in the category "eBay Motors\Parts & Accessories\Motorcycle Parts\Engines & Engine Parts\Pistons, Rings & Pistons Kits". The seller is "rocketracin65" and is located in San Jose, California. This item can be shipped worldwide.