FeaturesReplacement Twin Cam "A" engine cases for stock H-D chassis only (carb and EFI)Feature greater overall strength than stock crankcasesStrong, dependable Timken®-style sprocket shaft bearingsClearanced for strokes up to and including 5"All passages between the crankcase cam support plate are O-ring sealedCompatible with most stock componentsCam chest has clearance for up to .675" lift camsInclude S&S crankcase breather reed valve designed to eliminate oil carry-over and oil scavenging problemsRear motor mount bolts directly to the stock transmission; fully compatible with the stock primary, charging system, and other stock componentsMade in the U.S.A.Specs Bore Size: 4,125" Units: Each Base Color: Black Finish: Wrinkle Black Bore Size: 4.125" Color/Finish: Black Product Name: Crankcase Riding Style: StreetApproximate Package Weight & Dimensions Weight: 33.3 Height: 12 Length: 18 Width: 14.5