Upgrade to 5150's Custom Age 625+ Head Stud Kit Built by ARP!
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Upgrade to 5150's Custom Age 625+ Head Stud Kit Built by ARP!
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Swap out your BMW's Head Bolts for ARP's CA625+ Head Stud Kit!
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Secure your engine with race-proven durability using the ARP Head Stud Kit the top choice for serious BMW performance enthusiasts and professional builders alike.
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N55 Engines it is a MUST to drill and tap!
Bolt required to properly torque the head to the block
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This special long, thin, Torx socket is required for removal and installation of the head bolts on most BMWs with twin-cam cylinder heads.
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
This product was last offered at the strikethrough price on
05-02-2026
Stud conversion set up with 12 point fastening nuts
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Includes all head bolts for cylinder head
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MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
This product was last offered at the strikethrough price on
06-04-2026
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Set of 14 stretch bolts for installing cylinder head
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Includes all head bolts for cylinder head
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This product was last offered at the strikethrough price on
05-07-2026
Includes bolts to do one cylinder head
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This product was last offered at the strikethrough price on
05-02-2026
For use in conjunction with cylinder head bolts
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This product was last offered at the strikethrough price on
03-04-2026
M7/6x32
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MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
This product was last offered at the strikethrough price on
06-04-2026
Includes 14 head bolts required to properly torque the head to the block
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
This product was last offered at the strikethrough price on
06-04-2026
Stud conversion set up with 12 point fastening nuts
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms