| http://www.w3.org/ns/prov#value | - These simply are the best S54 head studs we have found for the E46 M3 6 cylinder engines, and we highly recommend them in both the racing and forced induction arena. (Due to the additional clamping force between the head and block, these are IDEAL for turbo charging and supercharging!) Converting from the factory BMW head bolts to head studs makes it much easier to assemble an engine, especially a r
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