ARP NASCAR Speed Nuts Lug Nut Kit - Fine Thread 5/8-18 - (10 Pack) 4704323-20- XL Includes air line and all

Includes air line and all necessary attaching hardware

They improve throttle response and fuel economy / and reduce fouling

Safety Standard: ECE22

1986-1993 Ford F-150

Never requires free-air calibration when used with an AEM Controller and connector plug

ARP NASCAR Speed Nuts Lug Nut Kit - Fine Thread 5/8-18 - (10 Pack) 4704323-20- XL Includes air line and allDesigned for professional racing environments where split second improvements in pit stop times can make the winning difference, and reliability is an absolute must. ARP Speed Nuts feature a profiled nut face for easy installation, quicker socket releases and resistance to jamming. They are made from premium heat treated chrome moly that nominally rated at 190, 000 psi tensile strength, shot peened to remove stress risers and double magnafluxed after