The Quick Time RM-6022W bellhousing connects small-block and big-block Chevy engines to transmissions utilizing the GM standard pattern such as the Muncie, Saginaw, Borg Warner T10, Tremec TKO, and Tremec TKX transmissions. This bellhousing is S.F.I. 6.1W (window) certified which is required by many sanctioning bodies for cars running 11.49 or faster in the quarter mile and contains an adjustable clutch window. This bellhousing is a universal fit bellhousing and is not vehicle specific. The Quick Time bellhousings are produced using a unique spin-forming process which results in a very high-strength material. This high material strength allows the Quick Time bellhousings to be lightweight while maintaining the protection you desire. Note: (Transmission Mounting Bolts Not Included)