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- USA
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Ships within 48 hours · Estimated delivery Jul 20 - Jul 25
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Description
B2X4/2X4 ARP Primo HSKNo longer is it necessary to order the Ford Pinto head studs kit and also buy the appropriate washer separate. This kit is assembled from individual ARP parts and includes the appropriate washers. This kit also features ARP 6 point (hex) nuts instead of the typical 12 point nuts. Its been long established that ARP fasteners require re torqueing on a regular basis. In our experience, this could be due to the 12 point fasteners having very little
No longer is it necessary to order the Ford Pinto head studs kit and also buy the appropriate washer separate.
This kit is assembled from individual ARP parts and includes the appropriate washers. This kit also features ARP 6-point (hex) nuts instead of the typical 12-point nuts.
Its been long established that ARP fasteners require re-torqueing on a regular basis. In our experience, this could be due to the 12-point fasteners having very little material. The 6-point nuts have must more material to them and are less prone to thermal expansion, providing superior torque retention.
U/C (Undercut) vs Standard shank studs
Undercutting of the stud equalizes the "stretch", which makes for a more consistent clamping force; and one that compensates for head gasket compression when the cylinder heads are installed. This helps prevent blown head gaskets, and assures optimum engine sealing.
All ARP's Head Studs are thread rolled after the heat treating process, which vastly improves their fatigue tolerance. These kits are manufactured from premium 8740 chrome moly steel and heat treated to 190,000 psi. Alternatively ARP2000 series studs are available which are heat treated and able to withstand 220000 psi.
What is the difference between 8740 Chrome Moly and ARP2000?
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy