Check the listing for details. Porsche 911 Titanium Lug Bolt for 10mm Spacer Aerospace Grade Titanium 10pc 39mm. Condition: New. Listed at 199.99 USD. 10 piece ACER Racing Titanium Lug Bolt set for use with 10mm spacers for Porsche 911, 718, Boxster & Cayman. Also works on all Cayenne models without spacers. 39mm shank length. M14x1.5 thread. M14x1.5x39 Also available in Black Titanium for $69 extra. Porsche OEM Part number is 996 361 203 01 for the steel lug bolt and these are a direct replacement but in the highest grade titanium (Grade 5 6AL4V Titanium) and are 10mm longer Manufactured from aerospace grade 6AL4V Titanium, these titanium lug bolts will not corrode or rust and offer a significant weight savings over steel lug bolts while giving a very sporty and aggressive look. Titanium is 50% lighter than steel, yet considerably stronger. Titanium is also resistant to the constant heating and cooling cycles common to Porsche wheels that otherwise destroy steel studs and bolts. Rolled threads for superior fatigue resistance.