Seller notes

This listing includes 8 Header Collector and Engine Bracket Torque Lock Nuts (correct, as pictured). These are Grade 8, very heavy duty (see pics). These secure the Header Collectors to the Exhaust Flange. Most headers only use 3 nuts per side, but some will use 4 nuts per side. These are also used for the Drive Train and Engine Brackets (example: Z-Bar, A/C or Alt Bracket, Trans Dipstick Tube, Cross Members, Motor Mounts, etc.) Lock nuts won't loosen up from engine/drive train vibrations. Detai...

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