Hydroformed from premium quality steel. Uniform thickness for superior strength. Mig-welded threaded inserts. Stress relief in a stronger and safer bell housing. Precision machined assures proper bolt hole. Includes block plate and hardware. Approved by major racing sanctioning bodies. Meets SFI 6.1 specifications. Product Features:Hydroformed From Premium Quality SteelUniform Thickness For Superior StrengthMig-Welded Threaded InsertsStress Relief In A Stronger/Safer BellhousingPrecision Machined Assures Proper Bolt HoleIncludes Block Plate And HardwareApproved By Major Racing Sanctioning BodiesMeets SFI 6.1 Specifications