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From Tikore: We offer titanium lug bolts (security and none security) and titanium lug nuts for all brands of vehicles (custom sets as well for those folks running spacers).
Please note we roll all of our threads, manufacture the bolts in house and all of our titanium bolts are crafted from grade 5 certified titanium bar stock. Weight savings, titanium is approx. 45% lighter than steel components.
In regards to our Porsche bolts the weight savings are slightly different as Porsche uses an aluminum ball seat, thus lighter weight in that area, but risk of wearing down the seat and oxidization of the aluminum. These bolts offer weight savings and an escape from the weathering that we all see from Porsche lug bolts.
The weight of the factory Porsche set is 4.11 lbs. The weight of the TiKORE set is 3.00 lbs. TiKORE Engineering note, we made sure the security bolt and the regular bolt weigh the same.