ARP 1/2-13 and 1/2-20" Thread Stud 5.310" Long Chromoly Black Oxide - Universal 20BONUS They improve throttle response and

They improve throttle response and fuel economy / and reduce fouling

Rounded Deep Open Pleats:

Pit Stop USA offers Zamp NC-40 SFI Neck Collar - Black - Adult NC002003A at low everyday pricing

Pit Stop USA offers Zamp Z-20 DIRT Series Shield - Clear & Clear - Anti Fog at low everyday prices

visibility

ARP 1/2-13 and 1/2-20" Thread Stud 5.310" Long Chromoly Black Oxide - Universal 20BONUS They improve throttle response andARPs 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: Stud 1 2 13 and 1 2 20 in