Stock Style BBC Header Flange - 3/8" Thick 304 Stainless -1-7/8" Primaries 1990-chevrolet-camaro-esi6096549 Or you can open up

Or you can open up the hole ever so slightly and fit the nut/washer included and accommodate it

There are no dead clicks

5" DOM Mild Steel construction - USA Made here in Cali

Our 5th Gen Camaro Viking Crusader Kit includes the following:

Stock Style BBC Header Flange - 3/8" Thick 304 Stainless -1-7/8" Primaries 1990-chevrolet-camaro-esi6096549 Or you can open upKooks Headers and Exhaust has been the leader in the High Performance Exhaust Industry for over 50 Years! Since 1962, Kooks takes pride in offering the best Headers and complete exhaust systems for your street, race and off road applications. We have won hundreds of championships and set countless records in the NHRA, IHRA, NMCA, NMRA, NASCAR, NASA, SCCA and many other racing organizations. Now with three generations of family leadership, we are proud