ARP main bolts are far superior to any other main bolt kit offered for use in competition engines, ARP main bolts are designed to meet the exacting standards and demands of professional engine builders.

ARP main bolts are Forged from 8740 chrome moly, all bolts feature generous under-head radius and rolled threads for the utmost reliability. The threads are rolled after heat treating, which gives them about 1000% longer fatigue life than most main bolts, which are threaded prior to heat-treating.

ARP main bolts are available in the popular High Performance Series, which, at a nominal rating of 180,000 psi, is a premium replacement for OEM fasteners, or the 200,000 psi nominal rated Pro Series, application-specific main bolts with reduced wrenching head and are designed for use in competition applications.

ARP provides Parallel-ground, hardened washers that are included with each kit.

Tech Tips for Main and Head bolts installation by ARP Automotive Racing Products

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ARP Bolts

ARP High Performance Buick V6 Stage I 4 Bolt Main Kit

Part #: 123-5201

ARP High Performance Buick V6 Stage I 4 Bolt Main Kit, ARP Main Bolts 123-5201

ARP High Performance Buick V6 Stage II Main Bolt Kit

Part #: 123-5202

Buick V6 Stage II, High Performance, ARP Main Bolts 123-5202

ARP High Performance Buick 455 2 Bolt Main Kit

Part #: 125-5201

Buick 455 cid, 2 bolt main, High Performance, ARP Main Bolts 125-5201

ARP High Performance Chevy Small Block Large Journal 2 Bolt Main Kit

Part #: 134-5001

Chevy Small Block Large journal, 2 bolt main, High Performance, ARP Main Bolts 134-5001

ARP High Performance Chevy Small Block Small Journal 2 Bolt Main Kit

Part #: 134-5002

Chevy Small Block Small journal, 2 bolt main, High Performance, ARP Main Bolts 134-5002

ARP High Performance Chevy Small Block Large Journal 4 Bolt Main Kit

Part #: 134-5202

Chevy Small Block Large journal, 4 bolt main, High Performance, ARP Main Bolts 134-5202

ARP Chevy Big Block 396-454 2 Bolt Main Kit 135-5002

Part #: 135-5002

Chevy Big Block 396-402-427-454 cid, 2 bolt main, ARP Main Bolts 135-5002

ARP High Performance Chevy Big Block 396-454 4 Bolt Main Kit

Part #: 135-5201

Chevy Big Block 396-402-427-454-502 cid, 4 bolt main, High Performance, ARP Main Bolts 135-5201

ARP High Performance Chrysler 426 Hemi 2 Bolt Main w/ Cross Bolts Kit

Part #: 145-5201

Chrysler 426 Hemi, 2 bolt main with cross bolts, High Performance, ARP Main Bolts 145-5201

ARP High Performance Ford Small Block 289-302 2 Bolt Main Kit

Part #: 154-5001

Ford Small Block 289-302 cid, 2 bolt main, High Performance, ARP Main Bolts 154-5001

ARP High Performance Ford Small Block 351 Windsor 2 Bolt Main Kit

Part #: 154-5003

Ford Small Block 351 Windsor, 2 bolt main, High Performance, ARP Main Bolts 154-5003

ARP High Performance Ford SB 351 Cleveland 351-400M 2 Bolt Main Kit

Part #: 154-5004

Ford Small Block 351 Cleveland, 351-400M, 2 bolt main, High Performance, ARP Main Bolts 154-5004

ARP High Performance Small Block 289-302 4 Bolt Main Kit

Part #: 154-5201

Ford Small Block 289-302 cid, 4 bolt main, High Performance, ARP Main Bolts 154-5201

ARP High Performance Small Block 351 Windsor 4 Bolt Main Kit

Part #: 154-5203

Ford Small Block 351 Windsor, 4 bolt main, High Performance, ARP Main Bolts 154-5203

ARP High Performance Ford Small Block 351 Cleveland 4 Bolt Main

Part #: 154-5204

Ford Small Block 351 Cleveland, 4 bolt main, High Performance, ARP Main Bolts 154-5204

ARP High Performance Ford Big Block 390-428 FE Main Bolts

Part #: 155-5201

Ford Big Block 390-428 cid FE Series, High Performance, ARP Main Bolts 155-5201

ARP High Performance Big Block 429-460 Main Bolt Kit

Part #: 155-5202

Ford Big Block 429-460 cid, High Performance, ARP Main Bolts 155-5202

ARP High Performance Main Bolts Olds 350-403 2 Bolt Main Kit

Part #: 184-5001

Oldsmobile 350-403 cid, 2 bolt main, High Performance, ARP Main Bolts 184-5001

ARP High Performance Oldsmobile 455 2 Bolt Main Kit

Part #: 185-5001

Oldsmobile 455 cid, 2 bolt main, High Performance, ARP Main Bolts 185-5001

ARP Main Bolts Toyota 1.6L (4AGE) DOHC, Pro Series

Part #: 203-5001

Toyota 1.6L (4AGE) Double Overhead Cam, Pro Series, ARP Main Bolts 203-5001

ARP Pro Series MGB 2 Cap Main Bolts 206-5001

Part #: 206-5001

MGB 2 Cap Main, Pro Series, ARP Main Bolts 206-5001

ARP Pro Series MGB 5 Cap Main Bolts 206-5002

Part #: 206-5002

MGB 5 Cap Main, Pro Series, ARP Main Bolts 206-5002

ARP Pro Series Chevy 6Cyl. 90° 4 Bolt Main Kit 233-5201

Part #: 233-5201

Chevy 6-cylinder 90 deg. V6, 4 bolt main, Pro Series, ARP Main Bolts 233-5201

ARP Pro Series Chevy 6Cyl. 90° 4 Bolt w/ 1/2" Straps on F&R Caps

Part #: 233-5203

Chevy 6-cylinder 90 deg. V6, 4 bolt main with 1/2" straps on F&R caps, Pro Series, ARP Main Bolts 233-5203

ARP Pro Series Chevy SB Large Journal 4 Bolt Main 12 Point Kit

Part #: 234-5201

Chevy Small Block Large journal, 4 bolt main (12pt), Pro Series, ARP Main Bolts 234-5201

ARP Pro Series Chevy SB Large Journal 4 Bolt w/ 1/2" Straps on F&R Cap

Part #: 234-5203

Chevy Small Block Large journal, 4 bolt with 1/2" straps on F&R caps, Pro Series, ARP Main Bolts 234-5203

ARP Pro Series Ford 6Cyl. 4.5L SVO Inline Valve Main Bolt Kit 253-5201

Part #: 253-5201

Ford 6-cylinder 4.5L SVO inline valve V6, Pro Series, ARP Main Bolts 253-5201

ARP Pro Series FOrd SB SVO 351 4 Bolt Main 3/8" Outer Bolts

Part #: 254-5202

Ford Small Block SVO 351 cid, 4 bolt main, 3/8" outer bolts, Pro Series, ARP Main Bolts 254-5202

ARP Pro Series Ford SB SVO 351 4 Bolt Main 7/16" Outer Bolts

Part #: 254-5203

Ford Small Block SVO 351 cid, 4 bolt main, 7/16" outer bolts, Pro Series, ARP Main Bolts 254-5203

ARP Pro Series Subaru 2.0/2.2/2.5 SOHC/DOHC EJ Series Main Bolt Kit

Part #: 260-5401

Subaru 2.0L, 2.2L & 2.5L Single Overhead Cam/Double Overhead Cam EJ Series Crankcase thru bolt kit, Pro Series, ARP Main Bolts 260-5401

Tech Tips for Main and Head Bolts Installation

Part #: Main Bolt Tech

Tech Tips for Main and Head bolts installation by ARP Automotive Racing Products.