ARP Intake Manifold Bolt Kit - 12 Point Head - Chromoly - Black Oxide - GM LS-Series AFM Performance Equipment then they are black hard

then they are black hard anodized to provide the toughest lug nut around

number 1904

Buick: LaCrosse 08 - 09 5

1971-1974 Pontiac Grand Safari

ARP Intake Manifold Bolt Kit - 12 Point Head - Chromoly - Black Oxide - GM LS-Series AFM Performance Equipment then they are black hardARPs product line contains thousands of part numbers, and has expanded to include virtually every fastener found in an engine and driveline. These range from quality high performance OEM replacement parts to exotic specialty hardware for Formula 1, IndyCar, IMSA, NASCAR and NHRA drag racing and marine applications. Since 1968, ARP is the fastener of champions and the world leader in fastener technology. Product Description: Intake Manifold Bolt Kit 12