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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 | Ford Zetec 2.0L head stud kit | $124.12 | |
| 251-4701 | Ford Cosworth Sierra/Escort head stud kit | $129.84 | |
| 151-4203 | Ford Escort head stud kit | $109.13 | |
| 152-4001 | Ford Inline 6, 240-300 hex head stud kit | $83.49 | |
| 152-4201 | Ford Inline 6, 240-300 12pt head stud kit | $98.96 | |
| 151-4201 | Ford Pinto 2000cc Inline 4 head stud kit | $101.10 | |
| 151-4202 | Ford Pinto 2300cc Inline 4 head stud kit | $107.38 | |
| 151-4702 | Ford Pinto 2300cc Inline 4 undercut 12pt head stud kit | $114.11 | |
| 151-4204 | Ford '03 Duratec 2.3L head stud kit | $146.09 | |
| 253-4701 | Ford 2.5L Duratec V6 undercut head stud kit | $206.19 | |
| 253-4102 | Ford 4.5L SVO V6 Inline-Valve head stud kit | $213.58 | |
| 253-4302 | Ford 4.5L SVO V6 Inline-Valve 12pt head stud kit | $290.07 | |
| 153-4001 | Ford T-bird V6 Super Coupe hex head stud kit | $130.57 | |
| 153-4203 | Ford T-bird V6 Super Coupe 12pt head stud kit | $145.37 | |
| Part # | Modular Ford | Price | |
| 256-4002 | Ford Modular 4.6L 3V hex head stud kit NEW! | $365.62 | |
| 156-4101 | Ford Modular 4.6L 2V & 4V hex head stud kit | $213.54 | |
| 156-4301 | Ford Modular 4.6L 2V & 4V 12pt head stud kit | $227.31 | |
| Part # | Small Block Ford | Price | |
| 154-4001 | Ford 289-302 7/16 in. hex head stud kit | $105.89 | |
| 254-4401 | Ford 289-302 Early head stud kit | $114.38 | |
| 154-4201 | SB Ford 7/16 in. 12pt head stud kit | $123.06 | |
| 254-4701 | Ford 289-302 Early, 351W 7/16 undercut head stud kit | $128.69 | |
| 154-4005 | Ford 289-302, w/351W head, 7/16 head stud kit | $140.59 | |
| 254-4405 | Ford 289-302, w/351W heads, hex undercut head stud kit | $149.08 | |
| 154-4205 | Ford 289-302, w/351W head, 12pt head stud kit | $161.10 | |
| 254-4705 | Ford 289-302, w/351W heads, undercut 12pt hsk | $166.15 | |
| 154-4002 | SB Ford 302 Boss hex head stud kit | $117.26 | |
| 154-4202 | SB Ford Boss 302 12pt head stud kit | $134.38 | |
| 154-4003 | SB Ford 1/2 in. hex head stud kit | $136.87 | |
| 254-4503 | SB Ford 1/2 in. hex undercut head stud kit | $173.66 | |
| 154-4203 | SB Ford 1/2 in. 12pt head stud kit | $175.37 | |
| 254-4703 | SB Ford 1/2 in. undercut 12pt head stud kit | $192.07 | |
| 154-4004 | SB Ford 351C hex head stud kit | $144.13 | |
| 154-4204 | SB Ford 351C 12pt head stud kit | $188.70 | |
| 254-4102 | SVO/Fontana alum block, w/'94up Yates hds, hex hsk | $133.92 | |
| 254-4101 | Ford SVO Fontana, w/'94up Yates hds, hsk | $222.62 | |
| 254-4302 | Ford Fontana SVO Block, w/Yates hds, 12pt hbk | $229.70 | |
| 254-4301 | Ford SVO Fontana, w/'94up Yates hds, hsk | $239.97 | |
| 254-4107 | Ford SVO 351 head stud kit | $182.04 | |
| 254-4307 | Ford SVO 351 12pt head stud kit | $192.68 | |
| 254-4109 | Ford 351 SVO Yates Design head stud kit | $144.95 | |
| 254-4309 | Ford 351 SVO Yates Design head stud kit | $186.43 | |
| 254-4110 | Ford 351 SVO Yates '94 Design head stud kit | $144.95 | |
| 254-4310 | Ford 351 SVO Yates '94 Design 12pt head stud kit | $186.43 | |
| 254-4111 | Ford 351 R Block, w/C-3heads, hex head stud kit | $147.09 | |
| 254-4501 | Ford 351 R Block, w/C-3heads, undercut hex hsk | $200.13 | |
| 254-4311 | Ford 351 R Block, w/C-3heads, 12pt head stud kit | $182.41 | |
| 254-4601 | Ford 351 R Block, w/C-3heads, undercut 12pt hsk | $217.86 | |
| 254-4112 | Ford 351R Block, w/6049-N351 heads, head stud kit | $118.21 | |
| 254-4314 | Ford 351R Block, w/6049-N351 heads, hsk | $204.06 | |
| 254-4113 | Ford 351 Block, w/6049-N351 heads, head stud kit | $131.36 | |
| 254-4315 | Ford 351 Block, w/6049-N351 heads, head stud kit | $184.71 | |
| 254-4312 | Ford 351 R Block with Brodix/Neal 12pt head stud kit | $198.42 | |
| Part # | Big Block Ford | Price | |
| 155-4001 | BB Ford 390-428 head stud kit | $142.14 | |
| 155-4201 | BB Ford 390-428 12pt head stud kit | $164.14 | |
| 155-4002 | BB Ford SOHC 427 head stud kit | $142.69 | |
| 155-4202 | BB Ford SOHC 427 12pt head stud kit | $181.06 | |
| 155-4003 | BB Ford 429-460 head stud kit | $196.12 | |
| 155-4203 | BB Ford 429-460 12pt head stud kit | $259.51 | |
| 255-4304 | BB Ford 460 SVO 12pt head stud kit | $286.87 | |
| 255-4101 | Ford 460, w/Blue Thunder heads, head stud kit | $194.20 | |
| 255-4301 | Ford 460, w/Blue Thunder heads, head stud kit | $249.77 | |
| 255-4305 | Trick Flow Prostock 12pt head stud kit | $265.81 | |
| Part # | Diesel Ford | Price | |
| 250-4202 | Ford 6.0L Power Stroke diesel head stud kit | $455.65 | |
| 150-4069 | Ford International 6.9L diesel head stud kit | $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.