ARP Rocker Arm Nut - 3/8-24 in Thread - 0.550 in Shank Diameter - 1.200 in Long - Chromoly - Black Oxide - Aluminum Rockers - Set of 16 R0400034XL 1-1/4 in Mandrel

1-1/4 in Mandrel

Here is the replacement rubber cover you need

and Air Plugs in Three Adjustable Inlets on Top and Both Sides of chin bar for the most adjustable Air Flow in the market

This could be a sign that it is time to replace your hood catch

ARP Rocker Arm Nut - 3/8-24 in Thread - 0.550 in Shank Diameter - 1.200 in Long - Chromoly - Black Oxide - Aluminum Rockers - Set of 16 R0400034XL 1-1/4 in MandrelA rocker arm adjuster that doesn't require special tools and won't work loose. Threads on the heat treated Perma Loc Adjusters are machined exactly perpendicular to the adjuster bottom. a set screw is also machined flush on the bottom. All of these features help eliminate setting valve lash on a regular basis. Since 1968, ARP is the fastener of champions and the world leader in fastener technology. Product Description: Rocker Arm Nut 3 8 24 in Thread