ARP offers special NASCAR header bolts that have been drilled for use of safety wire. They are made from heat-treated 8740 chrome moly steel (with a black oxide finish - rated at 180,000 psi) or Stainless 300 that is polished to a bright shine (nominally rated at 170,000 psi tensile strength

ARP NASCAR Compliant Drilled Header Bolt Kits are considerably stronger than Grade 8 hardware), and engineered to provide complete reliability in the most severe racing environments. They are available in hex or 12-point heads. Through use of safety wire, exhaust headers will maintain original tightness and can’t back off!

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ARP Bolts

ARP Chevy Small Block, Drilled, 3/8" Dia., .750" UHL Hex, Header Bolts

Part #: 100-1103

Chevrolet Small Block, Drilled, 12 pack, 3/8" Diameter, .750" Under Head Length, 3/8" Wrenching, Black Oxide, Hex Head, ARP Drilled Header Bolts 100-1103

Chevy Small Block, Drilled, 3/8" Dia., .750" UHL 12 Point Header Bolts

Part #: 100-1203

Chevrolet Small Block, Drilled, 12 pack, 3/8" Diameter, .750" Under Head Length, 3/8" Wrenching, Black Oxide, 12-point Heads, ARP Drilled Header Bolts 100-1203

ARP Chevy Small Block, Drilled, 3/8" Dia., .750" UHL Hex, Header Bolts

Part #: 400-1103

Chevrolet Small Block, Drilled, 12 pack, 3/8" Diameter, .750 Under Head Length, 3/8" Wrenching, Stainless 300, Hex Head, ARP Drilled Header Bolts 400-1103

ARP Chevy Big Block, Drilled 3/8" Dia., .875" UHL Hex, Header Bolts

Part #: 400-1104

Chevrolet Big Block, Drilled, 16 pack, 3/8" Diameter, .875" Under Head Length, 3/8" Wrenching, Stainless 300, Hex Head, ARP Drilled Header Bolts 400-1104

ARP Universal, Drilled, 3/8" Dia., .750 UHL Hex, Header Bolts

Part #: 400-1105

Universal, Drilled, 16 pack, 3/8" Diameter, .750" Under Head Length, 3/8" Wrenching, Stainless 300, Hex Head, ARP Drilled Header Bolts 400-1105

ARP Universal, Drilled, 3/8" Dia., .875" UHL, Hex, Header Bolts

Part #: 400-1106

Universal, Drilled, 12 pack, 3/8" Diameter, .875" Under Head Length, 3/8" Wrenching, Stainless 300, Hex Head, ARP Drilled Header Bolts 400-1106

Chevy Small Block, Drilled, 3/8" Dia., .750" UHL 12 Point Header Bolts

Part #: 400-1203

Chevrolet Small Block, Drilled, 12 pack, 3/8" Diameter, .750" Under Head Length, 3/8" Wrenching, Stainless 300, 12-point Head, ARP Drilled Header Bolts 400-1203

Chevy Big Block, Drilled 3/8" Dia., .875" UHL 12 Point Header Bolts

Part #: 400-1204

Chevrolet Big Block, Drilled, 16 pack, 3/8" Diameter, .875" Under Head Length, 3/8" Wrenching, Stainless 300, 12-point Head, ARP Drilled Header Bolts 400-1204

Universal, Drilled, 3/8" Dia., .750 UHL 12 Point Header Bolts

Part #: 400-1205

Universal, Drilled, 16 pack, 3/8" Diameter, .750" Under Head Length, 3/8" Wrenching, Stainless 300, 12-point, ARP Drilled Header Bolts 400-1205

Universal, Drilled, 3/8" Dia., .875" UHL, 12 Point Header Bolts

Part #: 400-1206

Universal, Drilled, 12 pack, 3/8" Diameter, .875" Under Head Length, 3/8" Wrenching, Stainless 300, 12-point, ARP Drilled Header Bolts 400-1206