This plate is for the use of 250 Supercharger on a TBS Billet LS Manifold Base. Includes: 1ea – Top Plate (250 Blower) 10ea – 5/16-18 x 1″ S.H.C.S. Stainless Steel 2ea – .308 x 1″ Dowel Pins 1ea – #9300 250 O-ring 5.5ft – #4903 1/8″ O-ring cord stock Note: #2595 192/250 Stainless Steel Stud Kit NOT INCLUDED