Comp Cams Adjusting Nut 3/8" Stud, Replacement Nuts for Magnum Rockers DND Performance Interior(R) DC Sports exhaust manifolds are

DC Sports exhaust manifolds are tig welded by hand

Bolt-On Fitment - Uses factory engine block threaded locations

Manufacturer part number: AA0800AF2X

but there's no requirement to do them simultaneously

Comp Cams Adjusting Nut 3/8" Stud, Replacement Nuts for Magnum Rockers DND Performance Interior(R) DC Sports exhaust manifolds areAdjusting Nut 3 8" Stud, Replacement Nuts for Magnum Rockers Designed for ultimate strength and locking force High EnergyT and Magnum polylocks are best for moderate lift and spring pressure applications Hi TechT Polylocks work well in all high end race applications The stud girdle polylocks are precision ground for minimum runout and tapered for extra strength in the locking area