ARP Thermostat Housing Bolts Nobody likes water leaks. And here’s ARP’s contribution to the solution. These premium grade bolts are engineered to properly engage the manifold threads and resist loosening.

ARP Thermostat Housing Bolts are application- specific, and come in your choice of black oxide finished chrome moly or rust-proof stainless steel, with handy 12-point or standard hex heads. Washers included.

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ARP Bolts

ARP Chevy 3 Piece Kit 12 Point Thermostat Housing Bolts

Part #: 130-7401

Chevy 3 piece kit 1" / 2" Under Head Length 12 point head, Black Oxide Chrome Moly bolts ARP part number 130-7401

ARP Chevy 3 Piece Kit Hex Head Thermostat Housing Bolts

Part #: 130-7402

Chevy 3 piece kit 1" / 2" Under Head Length Hex head, Black Oxide Chrome Moly bolts ARP part number 130-7402

ARP Chevy LS Series SB 20mm, 12 Point Thermostat Housing Bolts

Part #: 134-7401

Chevy LS Series Small Block 20mm Under Head Length 12 point head, Black Oxide Chrome Moly bolts ARP part number 134-7401

ARP Chevy LS Series SB 20mm Hex Thermostat Housing Bolts

Part #: 134-7402

Chevy LS Series Small Block 20mm Under Head Length Hex head, Black Oxide Chrome Moly bolts ARP part number 134-7402

ARP Ford 351W 0.875" 12 Point Thermostat Housing Bolts

Part #: 150-7401

Ford 351W 0.875" Under Head Length 12 point head, Black Oxide Chrome Moly bolts ARP part number 150-7401

ARP Ford 351W 0.875" Hex Head Thermostat Housing Bolts

Part #: 150-7402

Ford 351W 0.875" Under Head Length Hex head, Black Oxide Chrome Moly bolts ARP part number 150-7402

ARP Ford FE 2.250" 12 Point Thermostat Housing Bolts

Part #: 155-7401

Ford FE 2.250" Under Head Length 12 point head, Black Oxide Chrome Moly bolts ARP part number 155-7401

ARP Ford FE 2.250" Hex Head Thermostat Housing Bolts

Part #: 155-7402

Ford FE 2.250" Under Head Length Hex head, Black Oxide Chrome Moly bolts ARP part number 155-7402

ARP Pontiac 1" 12 Point Head Thermostat Housing Bolts

Part #: 190-7401

Pontiac 1" Under Head Length 12 point head, Black Oxide Chrome Moly bolts ARP part number 190-7401

ARP Pontiac 1" Hex Head Thermostat Housing Bolts

Part #: 190-7402

Pontiac 1" Under Head Length Hex head, Black Oxide Chrome Moly bolts ARP part number 190-7402

ARP Chevy 3 Piece Kit 12 Point Thermostat Housing Bolts

Part #: 430-7401

Chevy 3 piece kit 1" / 2" Under Head Length 12 Point head, Rust-proof Stainless Steel 300 bolts ARP part number 430-7401

ARP Chevy 3 Piece Kit Hex Thermostat Housing Bolts

Part #: 430-7402

Chevy 3 piece kit 1" / 2" Under Head Length Hex head, Rust-proof Stainless Steel 300 bolts ARP part number 430-7402

ARP Chevy LS Series SB 20mm, 12 Point Head Thermostat Housing Bolts

Part #: 434-7401

Chevy LS Series Small Block 20mm Under Head Length 12 point head, Rust-proof Stainless Steel 300 bolts ARP part number 434-7401

ARP Chevy LS Series SB 20mm Hex Head Thermostat Housing Bolts

Part #: 434-7402

Chevy LS Series Small Block 20mm Under Head Length Hex head, Rust-proof Stainless Steel 300 bolts ARP part number 434-7402

ARP Ford 351W 0.875" 12 Point Head Thermostat Housing Bolts

Part #: 450-7401

Ford 351W 0.875" Under Head Length 12 point head, Rust-proof Stainless Steel 300 bolts ARP part number 450-7401

ARP Ford 351W 0.875" Hex Head Thermostat Housing Bolts

Part #: 450-7402

Ford 351W 0.875" Under Head Length Hex head, Rust-proof Stainless Steel 300 bolts ARP part number 450-7402

ARP Ford FE 2.250" 12 Point Head Thermostat Housing Bolts

Part #: 455-7401

Ford FE 2.250" Under Head Length 12 point head, Rust-proof Stainless Steel 300 bolts ARP part number 455-7401

ARP Ford FE 2.250" Hex Head Thermostat Housing Bolts

Part #: 455-7402

Ford FE 2.250" Under Head Length Hex head, Rust-proof Stainless Steel 300 bolts ARP part number 455-7402

ARP Pontiac 1" 12 Point Head Thermostat Housing Bolts

Part #: 490-7401

Pontiac 1" Under Head Length 12 point head, Rust-proof Stainless Steel 300 bolts ARP part number 490-7401

ARP Pontiac 1" Hex Head Thermostat Housing Bolts

Part #: 490-7402

Pontiac 1" Under Head Length Hex head, Rust-proof Stainless Steel 300 bolts ARP part number 490-7402