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ARP Bolt

Main Studs and Main Bolts


Complete 2007 ARP Itemized and Searchable price list in MS Excel format (689k)
Download or Open in MS Excel (Right click to save or download)

ARP Bolts - Head Studs and Head Bolts

arp head studs

Obtaining the optimum cylinder head-to-block sealing is especially critical in small displacement engines employing high compression pistons or power adders like turbochargers, nitrous oxide and superchargers. That’s why ARP® head studs are popular among leading Sport Compact/Import racers.

You should know that ARP® uses a premium grade 8740 alloy that is rated far superior to "aircraft" quality. Then, each stud is precisely heat-treated to 200,000 psi. Following heattreat, 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.

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.

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—one that compensates for head gasket compression when the head is installed. This helps prevent blown head gaskets, and assures optimum sealing!

Premium parallel ground washers are also included with each kit.

Complete 2007 ARP Itemized and Searchable price list in MS Excel format (689k)
Download or Open in MS Excel
(Right click to save or download)

Application
Hex Nuts
12-Point Nuts
 
12-Point Nuts U/Cut Studs
BMC/TRIUMPH
A-series, 9 studs
206-4201
A-series, 11 studs
206-4204
A-series, 11 studs, shaved head
206-4206
B-series
206-4202
Triumph GT6
206-4205
Triumph Spitfire
206-4203
Triumph TR4
206-4207
Triumph TR7
206-4208
BMW: Cometic Gaskets available for all BMW Models. Contact us for pricing and thickness
2002, 318I, 320I
201-4601
535, 635, 735
201-4602
M20 2.5 / 2.7 Head stud Kit.    
NOTE:
This part is a Modified ARP 8740 Stud we do In House using a genuine ARP stud.
It is shortened a few mm's at the bottom of the stud in a non-critical area where is threads into the block to insure proper height and clearance. Nothing is Re-Threaded and the stud is not compromised in any way
We are also happy to sell you the stud Un-Shortened form if you are using a extra thick head gasket (3.0mm or 3.5mm.) Just specify when ordering
This IS NOT an ARP part # but it is an ARP stud used in the set. This is not a Raceware part or other hardware...

We have sold over 500 of these sets with no problems or failures and use them In House on our engines.
    TEP-2025 $225 Order Online
M50/S50/S52 2.5L 6-cylinder
201-4603
Mini Cooper / BMW
201-4301
M3 S14 4 Cyl 16V all
201-4702
M3 S54 Head Studs
201-4604
JE Pistons, Pauter Rods and Cometic Gaskets available for ALL BMW Models
 
FORD, 4 and 6-CYLINDER
2L Zetec
251-4702
2.5L Duratech V-6
253-4701
Cosworth Sierra/Escort (12mm)
251-4701
Escort 1600cc, 10mm
151-4203
Pinto 2000cc
151-4201
Pinto 2300cc
151-4202
151-4702
HOLDEN
304
205-4602
308, 1/2"
254-4009
234-4201
308 V8
205-4001
205-4601
HONDA/ACURA
Acura B18A1, 11mm
208-4302
Acura VTEC B18CI, 11mm, GSR
208-4303
B16A
208-4601
B20B, w/B16A head
208-4306
Civic D16Y
208-4305
Honda D16Z - Only
208-4301
Honda H22A4, VTEC
208-4304
H23A
208-4307
MITSUBISHI
2.0, 4-cylinder, 16 valve, 12mm, 4G63 up to 1994
207-4201
207-4701
2.0L, 4-cylinder, 16 valve, 11mm, 4G63 1994 to 1999
207-4203
207-4702
2.6L 4-cylinder
207-4202
NISSAN
L20 series, 4-cylinder
202-4201
A-12 engines
202-4202
A-14 engines
202-4203
L24, L26, L28 series, 6-cylinder
202-4206
PORSCHE
911, stainless studs - Dilvar replacement
204-4206
SUBARU
2.0L, 2.2L, 2.5L
260-4701
TOYOTA
22R
203-4201
7M GTE-Supra
203-4202
203-4701
4AG, 16 valve
203-4203
3SGTE
203-4204
2JZA80 Supra
203-4205
203-4702
VAUXHALL/OPEL
2.0L, 16 valve
209-4301
209-4701
Opel 2.5L, V6
209-4302
209-4702
VOLKSWAGEN
1600cc air-cooled
204-4201
Super Vee
204-4202
Golf/Jetta, 1.8L & 2L, 8 valve
204-4203
204-4701
Golf/Jetta, 1.8L & 2L, 16 valve
204-4204
204-4702
Audi 5 cylinder, 10 valve
204-4205
204-4703
Audi 5 cylinder, 20 valve
204-4207
204-4704
VR6
204-4208
204-4705

Head Bolt Sets

HIGH PERFORMANCE SERIES

High Performance head bolts are made of 8740 chrome moly and available with a reduced wrenching hex or 12-point with a wide area flanged head. They are nominally rated at 180,000 psi and kits come complete with hardened parallel-ground washers.

PROFESSIONAL SERIES

All Pro Series bolts are designed for competition applications and are rated nominally at 200,000 psi. Available with undercut short bolts that can help eliminate head gasket failures through providing more “stretch” to balance the longer bolts and compensate for the additional compression of gaskets.


Application
High Performance
Pro Series
Hex
12-Point
12-Point
12-Pt. UC
HOLDEN
304
205-3702
308
205-3601
205-3701
254-3703
TOYOTA
7M GTE, Supra
203-3902
1600
203-3901

 

 


Top-End Performance
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N.Hollywood CA 91605
(818)764-1901   (818)764-0155 fax
e-mail: topend@racetep.com
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