Series 8740 SBM Small Block Mopar 360/340/318 Head Stud Kit

#91065307

Series 8740 SBM Small Block Mopar 360/340/318 Head Stud Kit

Made from premium 8740 chromoly steel, with a maximum tensile strength of 200,000 PSI, for unmatched durability and performance under extreme conditions
Threads are rolled after heat treatment and thoroughly tested for tensile and yield strength, ensuring top-tier reliability and strength

$139.99

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Product Summary

12 Point Wrench Type, Stud Fastener Style, Black Oxide

Made from premium 8740 chromoly steel, with a maximum tensile strength of 200,000 PSI, for unmatched durability and performance under extreme conditions
Threads are rolled after heat treatment and thoroughly tested for tensile and yield strength, ensuring top-tier reliability and strength
Finished with a black oxide coating and oil finish, providing excellent resistance to rust and corrosion for long-lasting performance
Designed with a 12-point configuration, allowing for secure, high-torque fastening and precise applications, particularly for performance and racing setups
Designed specifically for Chrysler LA-based small block V8 engine builds, this stud kit ensures reliable and consistent cylinder head pressure, maximizing engine performance and longevity

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Key Specs

MFG. Part #	91065307
Brand	Speedway Motors
Fastener Style	Stud
Thread Pitch	7/16"-14
Fastener Material	8740 Chromoly Steel

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Speedway Motors 91065307 Details

Head stud kit for 1964-1992 Chrysler LA series engines, including 273, 318, 340, and 360
Made from premium 8740 chromoly steel with 200,000 PSI tensile strength
Higher yield strength compared to 4135 chromoly steel fasteners
Precision rolled threads with black oxide finish
Includes 10 long studs, 10 short studs, flat washers, and 12-point nuts
Provides excellent clamping force and easier cylinder head and gasket alignment
Ideal solution for max effort high compression or boosted racing applications
Not compatible with 1993 and later “Magnum” series 5.2L and 5.9L engines

Head Bolts or Head Studs, Which One Is Right for Your Build?

If you’re putting together a fresh bullet for your muscle car, hot rod, classic truck, or even your daily driver, you might be considering upgrading to head studs over the standard head bolts that you’re used to using. In most cases, the standard cylinder head bolt will suffice for mild performance usage. They also will often save some of your build budget for that hotter camshaft or roller rockers on your wish list as well. Not to mention for really tight engine bays, sometimes cylinder head bolts are the only option from an assembly/servicing standpoint without removing the entire engine just to replace a head gasket or other top end work (and who wants to do that?).

Head studs, on the other hand, provide much more even clamping force, as the nut and washer is tightened it only stretches the stud, providing for a more accurate torque reading versus a head bolt that is tightened into the block threads causing both twisting and stretching. Cylinder head studs also act as alignment dowels for the head gasket and cylinder head that make installation easier and are reusable. This is important where many modern head bolt applications are often a one-time-use “torque-to-yield” fastener. Head studs are certainly the preferred path for those going with higher compression, or higher cylinder pressures from nitrous, or boost pressure from a supercharger or turbo. We offer popular applications for GM, Ford, and Mopar in our premium Series 8740 head studs.

Our Series 8740 Head Studs Provide Maximum Fastener Strength

Manufactured from premium 8740 chromoly steel, our Series 8740 head studs feature 160-170K PSI fastener yield strength and 180-200K PSI fastener tensile strength. Each head stud kit includes head studs, washers, and nuts that are finished in a protective black oxide coating and oil finish to resist rust and look good on your engine for many years to come. The studs are heat treated and feature cold rolled threads for smooth and positive engagement in your engine block and are topped off with matching hardened washers with 12-point flange nuts to ensure your cylinder heads can be torqued to their proper spec. If you’re putting together a max effort engine build with high compression or boost our Series 8740 head stud kits are your best solution for never having to see your head gaskets ever again!

Application

Chrysler 1964-1992 LA Series V8 engines with the following displacements:

4.5L (273ci)
5.2L (318ci)
5.6L (340ci)
5.9L (360ci)

CA Prop 65

Speedway Motors 91065307 Specifications

KEY SPECS
MFG. Part #	91065307
Brand	Speedway Motors
Fastener Style	Stud
Thread Pitch	7/16"-14
Fastener Material	8740 Chromoly Steel

GENERAL
Wrench Type	12 Point
Head Style	12 point
Tensile Strength	190,000 psi
Fastener Finish	Black Oxide
Washers Included	Yes
Sold in Quantity	Kit
Finish	Black Oxide
Material Type	8740 Chromoly

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Fitment

1975-1980 Chrysler Cordoba

318 LA Engine Mopar
360 Mopar

1981-1983 Chrysler Cordoba

318 LA Engine Mopar

1983-1989 Chrysler Fifth Avenue

318 LA Engine Mopar

1981-1983 Chrysler Imperial

318 LA Engine Mopar

1977 Chrysler LeBaron

318 LA Engine Mopar

1978-1979 Chrysler LeBaron

318 LA Engine Mopar
360 Mopar

1980-1981 Chrysler LeBaron

318 LA Engine Mopar

1977-1978 Chrysler New Yorker

360 Mopar

1979-1980 Chrysler New Yorker

318 LA Engine Mopar
360 Mopar

1981-1982 Chrysler New Yorker

318 LA Engine Mopar

1971-1978 Chrysler Newport

360 Mopar

1979-1980 Chrysler Newport

318 LA Engine Mopar
360 Mopar

1981 Chrysler Newport

318 LA Engine Mopar

1978-1979 Chrysler Town & Country

318 LA Engine Mopar
360 Mopar

1981 Chrysler Town & Country

318 LA Engine Mopar

1964 Dodge 330

273 Mopar

1964 Dodge 440

273 Mopar

1964 Dodge 880

273 Mopar

1964-1966 Dodge A100

273 Mopar

1970 Dodge A100

318 LA Engine Mopar

1967-1970 Dodge A100 Pickup

273 Mopar
318 LA Engine Mopar

1964-1967 Dodge A100 Truck

273 Mopar

1968-1970 Dodge A100 Truck

318 LA Engine Mopar

1976-1980 Dodge Aspen

318 LA Engine Mopar
360 Mopar

1975 Dodge B100

318 LA Engine Mopar

1976-1978 Dodge B100

318 LA Engine Mopar
360 Mopar

1979-1980 Dodge B100

318 LA Engine Mopar

1971-1974 Dodge B100 Van

318 LA Engine Mopar
360 Mopar

1981-1991 Dodge B150

318 LA Engine Mopar

1975-1980 Dodge B200

318 LA Engine Mopar
360 Mopar

1971-1974 Dodge B200 Van

318 LA Engine Mopar
360 Mopar

1981 Dodge B250

318 LA Engine Mopar
360 Mopar

1982-1983 Dodge B250

318 LA Engine Mopar

1984-1991 Dodge B250

318 LA Engine Mopar
360 Mopar

1992-1994 Dodge B250

360 Mopar

1975-1980 Dodge B300

318 LA Engine Mopar
360 Mopar

1971-1974 Dodge B300 Van

318 LA Engine Mopar
360 Mopar

1981-1991 Dodge B350

318 LA Engine Mopar
360 Mopar

1992-1994 Dodge B350

360 Mopar

1973-1980 Dodge CB300

318 LA Engine Mopar
360 Mopar

1970 Dodge Challenger

318 LA Engine Mopar
340 Mopar

1971-1973 Dodge Challenger

318 LA Engine Mopar
340 Mopar
360 Mopar

1974 Dodge Challenger

318 LA Engine Mopar
360 Mopar

1966-1967 Dodge Charger

273 Mopar

1968-1969 Dodge Charger

318 LA Engine Mopar

1970 Dodge Charger

318 LA Engine Mopar
340 Mopar

1971-1973 Dodge Charger

318 LA Engine Mopar
340 Mopar
360 Mopar

1974-1978 Dodge Charger

318 LA Engine Mopar
360 Mopar

1965-1967 Dodge Coronet

273 Mopar

1968 Dodge Coronet

273 Mopar
318 LA Engine Mopar

1969 Dodge Coronet

318 LA Engine Mopar

1970 Dodge Coronet

318 LA Engine Mopar
340 Mopar

1971-1973 Dodge Coronet

318 LA Engine Mopar
340 Mopar
360 Mopar

1974-1976 Dodge Coronet

318 LA Engine Mopar
360 Mopar

1964-1965 Dodge Custom

273 Mopar

1975-1979 Dodge D100

318 LA Engine Mopar
360 Mopar

1986-1988 Dodge D100

318 LA Engine Mopar
360 Mopar

1989 Dodge D100

318 LA Engine Mopar

1968-1970 Dodge D100 Pickup

318 LA Engine Mopar

1971-1974 Dodge D100 Pickup

318 LA Engine Mopar
360 Mopar

1977-1982 Dodge D150

318 LA Engine Mopar
360 Mopar

1983 Dodge D150

318 LA Engine Mopar

1984-1991 Dodge D150

318 LA Engine Mopar
360 Mopar

1993 Dodge D150

360 Mopar

1975-1980 Dodge D200

318 LA Engine Mopar
360 Mopar

1968-1970 Dodge D200 Pickup

318 LA Engine Mopar

1971-1974 Dodge D200 Pickup

318 LA Engine Mopar
360 Mopar

1981-1982 Dodge D250

318 LA Engine Mopar
360 Mopar

1983 Dodge D250

318 LA Engine Mopar

1984-1991 Dodge D250

318 LA Engine Mopar
360 Mopar

1992-1993 Dodge D250

360 Mopar

1975-1980 Dodge D300

318 LA Engine Mopar
360 Mopar

1968-1970 Dodge D300 Pickup

318 LA Engine Mopar

1971-1974 Dodge D300 Pickup

318 LA Engine Mopar
360 Mopar

1981-1983 Dodge D350

318 LA Engine Mopar
360 Mopar

1984-1993 Dodge D350

360 Mopar

1989-1991 Dodge Dakota

318 LA Engine Mopar

1964-1967 Dodge Dart

273 Mopar

1968-1969 Dodge Dart

273 Mopar
318 LA Engine Mopar
340 Mopar

1970 Dodge Dart

318 LA Engine Mopar
340 Mopar

1971-1973 Dodge Dart

318 LA Engine Mopar
340 Mopar
360 Mopar

1974-1976 Dodge Dart

318 LA Engine Mopar
360 Mopar

1977 Dodge Diplomat

318 LA Engine Mopar

1978-1979 Dodge Diplomat

318 LA Engine Mopar
360 Mopar

1980-1989 Dodge Diplomat

318 LA Engine Mopar

1968-1974 Dodge M300

318 LA Engine Mopar

1978-1979 Dodge Magnum

318 LA Engine Mopar
360 Mopar

1970-1974 Dodge MB300

318 LA Engine Mopar

1980 Dodge Mirada

318 LA Engine Mopar
360 Mopar

1981-1983 Dodge Mirada

318 LA Engine Mopar

1968-1970 Dodge Monaco

318 LA Engine Mopar

1971-1978 Dodge Monaco

318 LA Engine Mopar
360 Mopar

1964-1967 Dodge Polara

273 Mopar

1968-1970 Dodge Polara

318 LA Engine Mopar

1971 Dodge Polara

318 LA Engine Mopar
360 Mopar

1972-1973 Dodge Polara

318 LA Engine Mopar
340 Mopar
360 Mopar

1974-1981 Dodge Ramcharger

318 LA Engine Mopar
360 Mopar

1982-1983 Dodge Ramcharger

318 LA Engine Mopar

1984-1991 Dodge Ramcharger

318 LA Engine Mopar
360 Mopar

1992-1993 Dodge Ramcharger

360 Mopar

1978-1980 Dodge RD200

318 LA Engine Mopar
360 Mopar

1975 Dodge Royal Monaco

318 LA Engine Mopar
360 Mopar

1976 Dodge Royal Monaco

360 Mopar

1977 Dodge Royal Monaco

318 LA Engine Mopar
360 Mopar

1979-1980 Dodge St. Regis

318 LA Engine Mopar
360 Mopar

1981 Dodge St. Regis

318 LA Engine Mopar

1975-1977 Dodge W100

318 LA Engine Mopar
360 Mopar

1984-1988 Dodge W100

318 LA Engine Mopar
360 Mopar

1989 Dodge W100

318 LA Engine Mopar

1968-1971 Dodge W100 Pickup

318 LA Engine Mopar

1972-1974 Dodge W100 Pickup

318 LA Engine Mopar
360 Mopar

1967 Dodge W100 Series

318 LA Engine Mopar

1977-1981 Dodge W150

318 LA Engine Mopar
360 Mopar

1982-1983 Dodge W150

318 LA Engine Mopar

1984-1991 Dodge W150

318 LA Engine Mopar
360 Mopar

1993 Dodge W150

360 Mopar

1975-1980 Dodge W200

318 LA Engine Mopar
360 Mopar

1968-1970 Dodge W200 Pickup

318 LA Engine Mopar

1971-1974 Dodge W200 Pickup

318 LA Engine Mopar
360 Mopar

1967 Dodge W200 Series

318 LA Engine Mopar

1981-1982 Dodge W250

318 LA Engine Mopar
360 Mopar

1983 Dodge W250

318 LA Engine Mopar

1984-1991 Dodge W250

318 LA Engine Mopar
360 Mopar

1992-1993 Dodge W250

360 Mopar

1975-1978 Dodge W300

318 LA Engine Mopar
360 Mopar

1979 Dodge W300

360 Mopar

1980 Dodge W300

318 LA Engine Mopar
360 Mopar

1968-1970 Dodge W300 Pickup

318 LA Engine Mopar

1971-1974 Dodge W300 Pickup

318 LA Engine Mopar
360 Mopar

1967 Dodge W300 Series

318 LA Engine Mopar

1981 Dodge W350

360 Mopar

1982-1983 Dodge W350

318 LA Engine Mopar
360 Mopar

1984-1993 Dodge W350

360 Mopar

1964-1967 Plymouth Barracuda

273 Mopar

1968 Plymouth Barracuda

273 Mopar
318 LA Engine Mopar
340 Mopar

1969-1970 Plymouth Barracuda

318 LA Engine Mopar
340 Mopar

1971-1973 Plymouth Barracuda

318 LA Engine Mopar
340 Mopar
360 Mopar

1974 Plymouth Barracuda

318 LA Engine Mopar
360 Mopar

1964-1967 Plymouth Belvedere

273 Mopar

1968 Plymouth Belvedere

273 Mopar
318 LA Engine Mopar

1969-1970 Plymouth Belvedere

318 LA Engine Mopar

1971 Plymouth Belvedere

340 Mopar

1965-1967 Plymouth Belvedere II

273 Mopar

1970 Plymouth Cuda

318 LA Engine Mopar
340 Mopar

1971-1973 Plymouth Cuda

318 LA Engine Mopar
340 Mopar
360 Mopar

1974 Plymouth Cuda

318 LA Engine Mopar
360 Mopar

1970-1973 Plymouth Duster

318 LA Engine Mopar
340 Mopar

1974-1976 Plymouth Duster

318 LA Engine Mopar
360 Mopar

1964-1965 Plymouth Fury

273 Mopar

1968-1970 Plymouth Fury

318 LA Engine Mopar

1971-1978 Plymouth Fury

318 LA Engine Mopar
360 Mopar

1968-1970 Plymouth Fury I

318 LA Engine Mopar

1971-1974 Plymouth Fury I

318 LA Engine Mopar
360 Mopar

1965 Plymouth Fury II

273 Mopar

1967-1970 Plymouth Fury II

318 LA Engine Mopar

1971-1974 Plymouth Fury II

318 LA Engine Mopar
360 Mopar

1965 Plymouth Fury III

273 Mopar

1967-1970 Plymouth Fury III

318 LA Engine Mopar

1971-1974 Plymouth Fury III

318 LA Engine Mopar
360 Mopar

1972-1977 Plymouth Gran Fury

318 LA Engine Mopar
360 Mopar

1980 Plymouth Gran Fury

318 LA Engine Mopar
360 Mopar

1981-1989 Plymouth Gran Fury

318 LA Engine Mopar

1967 Plymouth GTX

273 Mopar

1968-1969 Plymouth GTX

318 LA Engine Mopar

1971 Plymouth Roadrunner

340 Mopar

1972-1973 Plymouth Roadrunner

318 LA Engine Mopar
340 Mopar

1974-1975 Plymouth Roadrunner

318 LA Engine Mopar
360 Mopar

1965-1967 Plymouth Satellite

273 Mopar

1968 Plymouth Satellite

273 Mopar
318 LA Engine Mopar
340 Mopar

1969-1970 Plymouth Satellite

318 LA Engine Mopar
340 Mopar

1971-1973 Plymouth Satellite

318 LA Engine Mopar
340 Mopar
360 Mopar

1974 Plymouth Satellite

318 LA Engine Mopar
360 Mopar

1964 Plymouth Savoy

273 Mopar

1971-1976 Plymouth Scamp

318 LA Engine Mopar

1974-1981 Plymouth Trailduster

318 LA Engine Mopar
360 Mopar

1964-1967 Plymouth Valiant

273 Mopar

1968-1969 Plymouth Valiant

273 Mopar
318 LA Engine Mopar
340 Mopar

1970 Plymouth Valiant

318 LA Engine Mopar
340 Mopar

1971-1973 Plymouth Valiant

318 LA Engine Mopar
340 Mopar
360 Mopar

1974 Plymouth Valiant

318 LA Engine Mopar
360 Mopar

1975 Plymouth Valiant

318 LA Engine Mopar

1976 Plymouth Valiant

318 LA Engine Mopar
360 Mopar

1967 Plymouth VIP

318 LA Engine Mopar

1976-1980 Plymouth Volare

318 LA Engine Mopar
360 Mopar