ARP Main Bolt Kit 4Bolt Main
Main Studs
There are many important reasons to use ARP main stud kits, including the elimination of main cap walk and fretting, as well as protecting the threads in your engine block. All kits come complete with hardened parallel-ground washers and high quality nuts. Some applications have provisions for mounting windage trays and have specially designed standoff studs with serrated lock nuts to position the windage tray and lock it securely in place. The studs are manufactured from 8740 chrome moly steel, heat-treated in-house to 200,000 psi tensile strength, and precision J-form threads rolled after heat-treat to create a fastener that has threads 1000% stronger than others.
Main Bolts
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. 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 makes them about 1000% longer fatigue life than most main bolts, which are threaded prior to heat-treating. 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. Parallel-ground, hardened washers are included with each kit.
There are many important reasons to use ARP main stud kits, including the elimination of main cap walk and fretting, as well as protecting the threads in your engine block. All kits come complete with hardened parallel-ground washers and high quality nuts. Some applications have provisions for mounting windage trays and have specially designed standoff studs with serrated lock nuts to position the windage tray and lock it securely in place. The studs are manufactured from 8740 chrome moly steel, heat-treated in-house to 200,000 psi tensile strength, and precision J-form threads rolled after heat-treat to create a fastener that has threads 1000% stronger than others.
Main Bolts
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. 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 makes them about 1000% longer fatigue life than most main bolts, which are threaded prior to heat-treating. 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. Parallel-ground, hardened washers are included with each kit.
- Main Bolt Kit 4Bolt Main
Vehicle Fitments:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1978 - 1993 | Ford | Bronco | Custom |
| 1985 - 1993 | Ford | Bronco | Eddie Bauer |
| 1978 | Ford | Bronco | Northland |
| 1978 - 1981 | Ford | Bronco | Ranger XLT |
| 1990 - 1993 | Ford | Bronco | XL |
| 1982 - 1983 | Ford | Bronco | XLS |
| 1984 - 1992 | Ford | Bronco | XLT |
| 1982 - 1993 | Ford | Bronco | XLT Lariat |
| 1992 | Ford | Bronco | XLT Nite |
| 1969 - 1974 | Ford | Country Sedan | Base |
| 1969 - 1974 | Ford | Country Squire | Base |
| 1969 - 1977 | Ford | Custom 500 | Base |
| 1975 - 1977 | Ford | Custom 500 | Ranch Wagon |
| 1975 - 1982 | Ford | E-100 Econoline | Chateau, Base |
| 1975 - 1983 | Ford | E-100 Econoline | Custom |
| 1975 - 1978 | Ford | E-100 Econoline | Northland |
| 1983 | Ford | E-100 Econoline | XL |
| 1975 - 1993 | Ford | E-150 Econoline | Base |
| 1975 - 1982 | Ford | E-150 Econoline | Chateau |
| 1975 - 1991 | Ford | E-150 Econoline | Custom |
| 1975 - 1978 | Ford | E-150 Econoline | Northland |
| 1983 - 1993 | Ford | E-150 Econoline | XL |
| 1975 - 1993 | Ford | E-250 Econoline | Base |
| 1975 - 1982 | Ford | E-250 Econoline | Chateau |
| 1975 - 1991 | Ford | E-250 Econoline | Custom |
| 1975 - 1978 | Ford | E-250 Econoline | Northland |
| 1983 - 1993 | Ford | E-250 Econoline | XL |
| 1975 - 1993 | Ford | E-350 Econoline | Base |
| 1975 - 1982 | Ford | E-350 Econoline | Chateau |
| 1975 - 1991 | Ford | E-350 Econoline | Custom |
| 1975 - 1978 | Ford | E-350 Econoline | Northland |
| 1983 - 1993 | Ford | E-350 Econoline | XL |
| 1977 - 1986 | Ford | F-150 | Base |
| 1977 - 1992 | Ford | F-150 | Custom |
| 1993 | Ford | F-150 | Lightning |
| 1977 - 1978 | Ford | F-150 | Northland |
| 1977 - 1989 | Ford | F-150 | Ranger |
| 1978 - 1981 | Ford | F-150 | Ranger Lariat |
| 1977 - 1981 | Ford | F-150 | Ranger XLT |
| 1982 - 1993 | Ford | F-150 | XL |
| 1982 - 1983 | Ford | F-150 | XLS |
| 1977 - 1993 | Ford | F-150 | XLT |
| 1982 - 1992 | Ford | F-150 | XLT Lariat |
| 1969 - 1970 | Ford | Fairlane | 500 |
| 1969 | Ford | Fairlane | Base |
| 1970 | Ford | Falcon | Base, Futura |
| 1969 - 1974 | Ford | Galaxie 500 | Base |
| 1969 - 1970 | Ford | Galaxie 500 | XL |
| 1972 - 1976 | Ford | Gran Torino | Base, Squire |
| 1973 - 1976 | Ford | Gran Torino | Brougham |
| 1974 - 1975 | Ford | Gran Torino | Elite |
| 1972 - 1975 | Ford | Gran Torino | Sport |
| 1975 - 1977 | Ford | Granada | Base, Ghia |
| 1969 - 1986 | Ford | LTD | Base |
| 1970 - 1986 | Ford | LTD | Brougham |
| 1975 - 1986 | Ford | LTD | Country Squire |
| 1980 - 1986 | Ford | LTD | Crown Victoria |
| 1986 | Ford | LTD | Crown Victoria LX, Country Squire LX |
| 1975 - 1979 | Ford | LTD | Landau |
| 1985 | Ford | LTD | LX Brougham |
| 1980 - 1982 | Ford | LTD | S |
| 1987 - 1991 | Ford | LTD Crown Victoria | LX, Base, S |
| 1977 - 1978 | Ford | LTD II | Brougham |
| 1979 | Ford | LTD II | Landau |
| 1977 - 1979 | Ford | LTD II | S, Base |
| 1977 | Ford | LTD II | Squire |
| 1969 - 1973 | Ford | Mustang | Base |
| 1969 - 1971 | Ford | Mustang | Boss 302 |
| 1971 - 1972 | Ford | Mustang | Boss 351 |
| 1970 - 1973 | Ford | Mustang | Mach 1, Grande |
| 1969 - 1970 | Ford | Mustang | Shelby GT-350, Boss 429, Shelby GT-500 |
| 1969 - 1974 | Ford | Ranch Wagon | Base |
| 1970 | Ford | Ranch Wagon | Police Cruiser |
| 1969 - 1971 | Ford | Ranchero | Base |
| 1969 - 1979 | Ford | Ranchero | GT, 500 |
| 1970 - 1979 | Ford | Ranchero | Squire |
| 1971 | Ford | Torino | 500 |
| 1969 - 1976 | Ford | Torino | Base |
| 1969 - 1971 | Ford | Torino | GT, Squire, Cobra |
| 1970 - 1971 | Ford | Torino | Super Cobra Jet, Brougham |
ARP Main Bolt Kit 4Bolt Main
Sale price$118.74 USD