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It is for good reason that virtually every top professional engine builder relies on ARP Pro Series head studs for their all-out competition powerplants. Simply stated, there's not a better stud setup on the market today. For openers, ARP uses a premium grade 8740 alloy that is rated far superior to "aircraft" quality. Then, each stud is placed vertically in special racks and precisely heat-treated to 200,000 psi. This procedure ensures complete heat penetration and the results are far superior to those lesser quality studs from other manufacturers who just dump pieces in a basket and hope for the best. Following heat-treat, each stud is centerless ground to make it as close to perfectly concentric as possible. This procedure involves about ten very slight cuts and results in an exceptionally straight part. It's important to note that lesser quality studs are not even centerless ground - the material is thread rolled in bar stock form (mostly before heat-treat, when the material is easier to machine). Because ARP studs are manufactured to such exacting tolerances, you will note that gaskets and cylinder heads literally glide into position and are perfectly aligned - something that won't happen with inferior quality head studs. (More Below) |
| Part # | 4- and 6-Cylinder Ford | Price | |
|---|---|---|---|
| 251-4702 | 2.0L Zetec Head Stud Kit with 12-Point Nuts and Undercut Threads |
$124.12 | |
| 151-4204 | 2.3L Duratec 2003 Head Stud Kit with 12-Point Nuts and Standard Threads |
$146.09 | |
| 251-4701 | Cosworth Sierra/Escort (M12) Head Stud Kit with 12-Point Nuts and Undercut Threads |
$129.84 | |
| 151-4203 | Escort 1600cc, M10 Head Stud Kit with 12-Point Nuts and Standard Threads |
$109.13 | |
| 152-4001 | Inline 6, 240-300 cid Head Stud Kit with Hex Nuts and Standard Threads |
$83.49 | |
| 152-4201 | Inline 6, 240-300 cid Head Stud Kit with 12-Point Nuts and Standard Threads |
$98.96 | |
| 151-4201 | Pinto 2000cc Head Stud Kit with 12-Point Nuts and Standard Threads |
$101.10 | |
| 151-4702 | Pinto 2300cc Head Stud Kit with 12-Point Nuts and Undercut Threads |
$114.11 | |
| 151-4202 | Pinto 2300cc Head Stud Kit with 12-Point Nuts and Standard Threads |
$107.38 | |
| 253-4701 | 2.5L Duratech V-6 Head Stud Kit with 12-Point Nuts and Undercut Threads |
$206.19 | |
| 253-4102 | 4.5L, SVO inline valve head #M6049-H380 Head Stud Kit with Hex Nuts and Standard Threads |
$213.58 | |
| 253-4302 | 4.5L, SVO inline valve head #M6049-H380 Head Stud Kit with 12-Point Nuts and Standard Threads |
$290.07 | |
| 153-4001 | Ford T-Bird Supercoupe Head Stud Kit with Hex Nuts and Standard Threads |
$130.57 | |
| 153-4203 | Ford T-Bird Supercoupe Head Stud Kit with 12-Point Nuts and Standard Threads |
$145.37 | |
| Part # | Modular Ford | Price | |
| 256-4001 | 4.6/5.0L 2/4V Head Stud Kit with Hex Nuts and Standard Threads |
$365.65 | |
| 156-4101 | 4.6L, 2 valve & 4 valve Head Stud Kit with Hex Nuts and Standard Threads |
$271.80 | |
| 156-4301 | 4.6L, 2 valve & 4 valve Head Stud Kit with 12-Point Nuts and Standard Threads |
$289.96 | |
| 256-4201 | 4.6/5.0L 2/4V Head Stud Kit with 12-Point Nuts and Standard Threads |
$384.85 | |
| Part # | Small Block Ford | Price | |
| 154-4005 | 289-302, 5.0 with 351W head, 7/16 in.-14 cylinder block thread
M-6049-J302, SVO high port & M-6049-L302, AFR 185
Edelbrock aluminum , GT-40 style with insert T washer Head Stud Kit with Hex Nuts and Standard Threads |
$140.59 | |
| 254-4705 | 289-302, 5.0 with 351W head, 7/16 in.-14 cylinder block thread
M-6049-J302, SVO high port & M-6049-L302, AFR 185
Edelbrock aluminum , GT-40 style with insert T washer Head Stud Kit with 12-Point Nuts and Undercut Threads |
$166.15 | |
| 154-4205 | 289-302, 5.0 with 351W head, 7/16 in.-14 cylinder block thread
M-6049-J302, SVO high port & M-6049-L302, AFR 185
Edelbrock aluminum , GT-40 style with insert T washer Head Stud Kit with 12-Point Nuts and Standard Threads |
$161.10 | |
| 254-4405 | 289-302, 5.0 with 351W head, 7/16 in.-14 cylinder block thread
M-6049-J302, SVO high port & M-6049-L302, AFR 185
Edelbrock aluminum , GT-40 style with insert T washer Head stud Kit with Hex Nuts and Undercut Threads |
$149.08 | |
| 154-4001 | 289-302, 5.0 with factory heads, 7/16 in. and Edelbrock 60259, 60379 Head Stud Kit with Hex Nuts and Standard Threads |
$105.89 | |
| 254-4701 | 289-302, 5.0 with factory heads, 7/16 in. and Edelbrock 60259, 60379 Head Stud Kit with 12-Point Nuts and Undercut Threads |
$128.69 | |
| 154-4201 | 289-302, 5.0 with factory heads, 7/16 in. and Edelbrock 60259, 60379 Head Stud Kit with 12-Point Nuts and Standard Threads |
$123.06 | |
| 254-4401 | 289-302, 5.0 with factory heads, 7/16 in. and Edelbrock 60259, 60379 Head stud Kit with Hex Nuts and Undercut Threads |
$114.38 | |
| 154-4002 | 302 Boss Head Stud Kit with Hex Nuts and Standard Threads |
$117.26 | |
| 154-4202 | 302 Boss Head Stud Kit with 12-Point Nuts and Standard Threads |
$134.38 | |
| 254-4112 | 351 R block w/6049-N351 heads Head Stud Kit with Hex Nuts and Standard Threads |
$118.21 | |
| 254-4314 | 351 R block w/6049-N351 heads Head Stud Kit with 12-Point Nuts and Standard Threads |
$204.06 | |
| 254-4312 | 351 R block with Brodix/Neal heads, Blue Thunder heads Head Stud Kit with 12-Point Nuts and Standard Threads |
$198.42 | |
| 254-4111 | 351 R block with C3 heads Head Stud Kit with Hex Nuts and Standard Threads |
$147.09 | |
| 254-4601 | 351 R block with C3 heads Head Stud Kit with 12-Point Nuts and Undercut Threads |
$217.86 | |
| 254-4501 | 351 R block with C3 heads Head stud Kit with Hex Nuts and Undercut Threads |
$200.13 | |
| 254-4311 | 351 R block with C3 heads Head Stud Kit with 12-Point Nuts and Standard Threads |
$182.41 | |
| 154-4004 | 351 Cleveland, 400M Head Stud Kit with Hex Nuts and Standard Threads |
$144.13 | |
| 154-4204 | 351 Cleveland, 400M Head Stud Kit with 12-Point Nuts and Standard Threads |
$188.70 | |
| 254-4109 | 351 SVO Yates design Head Stud Kit with Hex Nuts and Standard Threads |
$144.95 | |
| 254-4309 | 351 SVO Yates design Head Stud Kit with 12-Point Nuts and Standard Threads |
$186.43 | |
| 254-4110 | 351 SVO Yates 1994 design Head Stud Kit with Hex Nuts and Standard Threads |
$144.95 | |
| 254-4310 | 351 SVO Yates 1994 design Head Stud Kit with 12-Point Nuts and Standard Threads |
$186.43 | |
| 154-4003 | 351W with factory heads, M-6049-J302, SVO high port and M-6049-L302 GT-40 style, Edelbrock aluminum and Iron Dart with 1/2-13 cylinder block threads Head Stud Kit with Hex Nuts and Standard Threads |
$136.87 | |
| 254-4703 | 351W with factory heads, M-6049-J302, SVO high port and M-6049-L302 GT-40 style, Edelbrock aluminum and Iron Dart with 1/2-13 cylinder block threads Head Stud Kit with 12-Point Nuts and Undercut Threads |
$192.07 | |
| 154-4203 | 351W with factory heads, M-6049-J302, SVO high port and M-6049-L302 GT-40 style, Edelbrock aluminum and Iron Dart with 1/2-13 cylinder block threads Head Stud Kit with 12-Point Nuts and Standard Threads |
$175.37 | |
| 254-4503 | 351W with factory heads, M-6049-J302, SVO high port and M-6049-L302 GT-40 style, Edelbrock aluminum and Iron Dart with 1/2-13 cylinder block threads Head stud Kit with Hex Nuts and Undercut Threads |
$173.66 | |
| 254-4113 | Std. 351 Block w/6049-N351 heads Head Stud Kit with Hex Nuts and Standard Threads |
$131.36 | |
| 254-4315 | Std. 351 Block w/6049-N351 heads Head Stud Kit with 12-Point Nuts and Standard Threads |
$184.71 | |
| 254-4102 | SVO and Fontana aluminum blocks w/'94 or later Yates heads Head Stud Kit with Hex Nuts and Standard Threads |
$133.92 | |
| 254-4301 | SVO and Fontana aluminum blocks w/'94 or later Yates heads Head Stud Kit with 12-Point Nuts and Undercut Threads |
$239.97 | |
| 254-4101 | SVO and Fontana aluminum blocks w/'94 or later Yates heads Head stud Kit with Hex Nuts and Undercut Threads |
$222.62 | |
| 254-4302 | SVO and Fontana aluminum blocks w/'94 or later Yates heads Head Stud Kit with 12-Point Nuts and Standard Threads |
$229.70 | |
| Part # | Big Block Ford | Price | |
| 155-4001 | 390-428 cid FE series, also Edelbrock Head Stud Kit with Hex Nuts and Standard Threads |
$142.14 | |
| 155-4201 | 390-428 cid FE series, also Edelbrock Head Stud Kit with 12-Point Nuts and Standard Threads |
$164.14 | |
| 155-4003 | 429-460 385 series & new 429CJ SVO alum #6049-A 429, also Edelbrock, KAASE Head Stud Kit with Hex Nuts and Standard Threads |
$196.12 | |
| 155-4203 | 429-460 385 series & new 429CJ SVO alum #6049-A 429, also Edelbrock, KAASE Head Stud Kit with 12-Point Nuts and Standard Threads |
$259.51 | |
| 255-4101 | 460 cid, with Blue Thunder heads Head Stud Kit with Hex Nuts and Standard Threads |
$194.20 | |
| 255-4301 | 460 cid, with Blue Thunder heads Head Stud Kit with 12-Point Nuts and Standard Threads |
$249.77 | |
| 255-4304 | 460 SVO aluminum, M-6049-A460 & M-6049-B460, C460 (must use 12-pt. nuts) Head Stud Kit with 12-Point Nuts and Standard Threads |
$286.87 | |
| 155-4002 | SOHC 427 Head Stud Kit with Hex Nuts and Standard Threads |
$142.69 | |
| 155-4202 | SOHC 427 Head Stud Kit with 12-Point Nuts and Standard Threads |
$181.06 | |
| 255-4305 | Trick Flow "Pro Stock" Head Stud Kit with 12-Point Nuts and Standard Threads |
$265.81 | |
| Part # | Diesel Ford | Price | |
| 250-4202 | Ford, 6.0L Powerstroke Head Stud Kit with 12-Point Nuts and Standard Threads |
$455.65 | |
| 250-4201 | Ford, 7.3L Powerstroke '93-'02 Head Stud Kit with 12-Point Nuts and Standard Threads |
$598.47 | |
| 150-4069 | Ford, International 6.9L Head Stud Kit with Hex Nuts and Standard Threads |
$241.55 |
ARP studs are thread rolled after heat-treat, which gives them about 1000% (that's ten times) better fatigue strength than those studs that are threaded prior to heat-treat (a very common industry practice). It costs a lot more to do it this way, because it's tough on tooling, but the results are well worth the extra effort.
You will also note that ARP offers specially undercut studs for several engines. This procedure (done only to the shorter studs) more equalizes the "stretch" of both studs, which makes for a more consistent clamping force - and one that compensates for head gasket compression when the cylinder heads are installed. This helps prevent blown head gaskets, and assures optimum engine sealing!
Premium quality heat-treated 8740 chrome moly steel head stud kits are available for most every domestic and import applications. You won't find a better quality stud on the market from any other source. Look for ARP stamped on each stud as your assurance of quality.