Sign Up to Get
10% Off Your Next Order!
+ 500 FREQUENT BUYER POINTS
Be among the first to receive Weekly Specials & OPGI News.
10% off restoration parts only. 500 Frequent Buyer Points added after promotional order ships. See welcome email for full details.
Sign up for texts from OPGI, and get all our best offers and more!
By subscribing to OPGI text messaging at 80205, you agree to receive recurring autodialed marketing text msgs (e.g. cart reminders) to the mobile number used at opt-in. Consent is not a condition of purchase. Msg frequency may vary. Msg & data rates may apply. Reply HELP for help and STOP to cancel. See Terms and Conditions & Privacy Policy.
ADDED TO YOUR CART!
Stud Set, Cylinder Head, ARP, Buick 401-425 Nailhead
ADDED TO YOUR WISHLIST!
Head studs or head bolts. Which do you use? Head studs put less stress on the block and have a more even clamping force than head bolts, but if you want to remove your heads while the engine is in the car, head bolts are the way to go. Otherwise you have to pull the engine to get the heads off with head studs. Either way you choose, ARP has the parts for you. Their head studs have undercut shanks to put constant pressure on the head and gasket for maximum sealing. ARP head studs are manufactured from 8740 chromoly steel and come with parallel ground washers and heat-treated nuts.
Find parts that fit your vehicle