Why should I use head studs instead of head bolts?

Head studs offer more consistent clamping force than factory head bolts. This is because the stud is threaded into the block, and the head is torqued down with a nut, allowing for more even pressure distribution and better sealing of the head gasket.

What is the advantage of 12-point nuts?

The 12-point nuts are designed to provide more wrenching surface area in a smaller diameter compared to standard 6-point nuts. This makes them easier to get a socket on and turn, especially in the confined spaces found around a cylinder head.

What is included in this head stud kit?

This kit includes the necessary head studs, 12-point nuts, and washers. It also comes with ARP's specialized thread sealer for the block threads and assembly lube for the stud threads and nuts to ensure accurate torque readings.

ARP Pontiac Iron Duke 12pt Head Stud Kit 191-4201

Name: ARP Pontiac 4-cylinder Iron Duke 12pt head stud kit
Brand: ARP
SKU: arp-arp-pontiac-4-cylinder-iron-duke-12pt-head-stud-kit-t14-853983
Price: 117.48 USD
Availability: BackOrder

ARP Pontiac 4-cylinder Iron Duke 12pt head stud kit

$117.48

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

ARP Pontiac 4-cylinder Iron Duke 12pt head stud kit.

Key Features

ARP 12-point head stud kit for Pontiac 4-cylinder Iron Duke engines.
Made from heat-treated 8740 chrome-moly steel with a tensile strength of 200,000 psi.
Features 12-point nuts for easier access in tight engine compartments.
Black oxide finish helps prevent corrosion.
Includes thread sealer and assembly lube for proper installation.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Product Details

If you're working on the Pontiac 4-cylinder Iron Duke engine, this ARP 12-point head stud kit is what you'll want for reassembling the cylinder head. These studs are a significant upgrade over the factory head bolts, offering a more consistent clamping force to keep your head gasket sealed under pressure. ARP is well-known for making strong engine hardware, and these studs are no exception.

This kit uses 12-point nuts, which are easier to access in tight spots compared to standard hex nuts, especially when you're working around the cylinder head. The studs themselves are made from ARP's proprietary chrome-moly steel, heat-treated to 200,000 psi tensile strength. This means they can handle the stress of keeping your cylinder head firmly in place, preventing leaks and ensuring proper engine operation. They are also black oxide finished to resist corrosion.

When installing these studs, remember to chase your block threads with a thread chaser (not a tap) to clean them out. Also, use the ARP thread sealer on the block threads and the lube that comes with the kit on the stud threads and nuts. This ensures accurate torque readings and proper clamping force.