ARP Head Studs
World-leading Fastener Technology
ARP started applying technology to race fastener design and manufacturing in 1968. We'll discuss five components of fastener technology in detail.
Design
Today's critical diesel fasteners - head studs and bolts, main studs and bolts, and driveline - have been designed stronger than ever before to handle the extreme loads. As a results, installation pre-loads - the amount the fastener is stretched during installation - are very high.
Installation Methods
There are three methods that can be employed to determine how much tension is exerted on a fastener; using a torque wrench, measuring the amount of stretch, and turning the fastener a pre-determined amount (torque angle). Of these methods, use of a stretch gauge is the most accurate.
Metallurgy
The following material is intended to provide a brief overview of the metallurgical considerations that influence the design and production of the most reliable fasteners in motorsports. It is hoped that a simple understanding of the knowledge and commitment required to produce this reliability will make your future fastener decisions much, much easier.
ARP Materials
The materials ARP uses in fastener manufacturing are listed and compared.
Recognizing Common Failures
There are six types of metallurgical failures that affect fasteners. Each type has unique identifying physical characteristics. The following examples are designed to be used like a spark plug reading chart to help analyze fastener failures.
Nissan RB20, RB25, RB30 Twin Cam Head Stud Kit 202-4301
Original price
$389.99
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Original price
$389.99
Original price
$389.99
$389.99
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$389.99
Current price
$389.99
In stock
Nissan RB20, RB20DET, RB25, RB25DET Head Stud Kit Part # ARP 202-4301
Original price
$389.99
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Original price
$389.99
Original price
$389.99
$389.99
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$389.99
Current price
$389.99
Nissan RB20, RB20DET, RB25, RB25DET, RB30 Twin Cam Head Stud Kit (ARP2000) ARP 202-4309
Original price
$469.99
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Original price
$469.99
Original price
$469.99
$469.99
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$469.99
Current price
$469.99
In stock
Head studs hold your head and block together. As you make more power than your engine was designed to hold from the factory, the head and the block...
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Original price
$469.99
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Original price
$469.99
Original price
$469.99
$469.99
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$469.99
Current price
$469.99
ARP Head Stud Kit Toyota Supra 1JZ / 2JZ 203-4205
Original price
$419.99
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Original price
$419.99
Original price
$419.99
$419.99
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$419.99
Current price
$419.99
In stock
Part # ARP 203-4205 ARP JZ Head Stud Kit
Original price
$419.99
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Original price
$419.99
Original price
$419.99
$419.99
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$419.99
Current price
$419.99
Nissan RB DOHC 1/2" ARP Head Studs AR999-4209
Original price
$329.00
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Original price
$329.00
Original price
$329.00
$329.00
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$329.00
Current price
$329.00
In stock
AR9994209 or 9994209 NISSAN RB DOHC 1/2" HEAD STUDS ARP fasteners fits Nissan RB20DET, RB25DET, RB30ET 1/2" Stud With Twin Cam Head & CA18DET...
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Original price
$329.00
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Original price
$329.00
Original price
$329.00
$329.00
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$329.00
Current price
$329.00
Nissan GTR RB26DETT ARP2000 Head Stud Kit 202-4207
Original price
$619.00
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Original price
$619.00
Original price
$619.00
$619.00
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$619.00
Current price
$619.00
Low stock
ARP RB26 HEAD STUDS 2000 SERIES 202-4207 When rebuilding an engine, there are several stock parts you wont want to reuse. Stock head studs/bolts st...
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Original price
$619.00
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Original price
$619.00
Original price
$619.00
$619.00
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$619.00
Current price
$619.00
Nissan SR20 DET Main Stud Kit 202-5402
Original price
$259.00
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Original price
$259.00
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$259.00
$259.00
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$259.00
Current price
$259.00
Low stock
Part # ARP 202-5402
Original price
$259.00
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Original price
$259.00
Original price
$259.00
$259.00
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$259.00
Current price
$259.00
Nissan & Holden RB30 SOHC ARP Head Stud Kit
Original price
$499.00
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Original price
$499.00
Original price
$499.00
$499.00
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$499.00
Current price
$499.00
Low stock
Nissan RB30 SOHC Head Stud kit 11mm Studs with 12 point nuts & Washers.
Original price
$499.00
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Original price
$499.00
Original price
$499.00
$499.00
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$499.00
Current price
$499.00
Nissan 2.0L SR20 DET M11 Head Stud Kit (Under Cut) 102-4701
Original price
$359.00
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Original price
$359.00
Original price
$359.00
$359.00
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$359.00
Current price
$359.00
Low stock
SR20 Head Stud Kit Part # ARP 102-4701
Original price
$359.00
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Original price
$359.00
Original price
$359.00
$359.00
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$359.00
Current price
$359.00
Subaru EJ20 / EJ25 2.0L & 2.5L DOHC Head Stud Kit 260-4701
Original price
$495.00
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Original price
$495.00
Original price
$495.00
$495.00
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$495.00
Current price
$495.00
Low stock
Part # ARP 260-4701
Original price
$495.00
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Original price
$495.00
Original price
$495.00
$495.00
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$495.00
Current price
$495.00
ARP Head Studs ARP2000 - Toyota 86 / Subaru BRZ - 203-4305
Original price
$499.00
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Original price
$499.00
Original price
$499.00
$499.00
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$499.00
Current price
$499.00
Special Order Only fits Toyota 4UGSE / FA20 2.0L (ARP2000)
Original price
$499.00
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Original price
$499.00
Original price
$499.00
$499.00
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$499.00
Current price
$499.00
ARP 12pt Head Stud Kit - Toyota 3SGTE 203-4204
Original price
$339.99
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Original price
$339.99
Original price
$339.99
$339.99
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$339.99
Current price
$339.99
Low stock
Part # ARP 203-4204
Original price
$339.99
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Original price
$339.99
Original price
$339.99
$339.99
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$339.99
Current price
$339.99
Ford XR6 M12 Head Stud Kit 252-4302
Original price
$589.00
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Original price
$589.00
Original price
$589.00
$589.00
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$589.00
Current price
$589.00
Low stock
Ford XR6 M12 Head Stud Kit Part # ARP 252-4302
Original price
$589.00
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Original price
$589.00
Original price
$589.00
$589.00
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$589.00
Current price
$589.00
Mitsubishi 4G63 Evo M11 Head Stud Kit 207-4203
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$289.99
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Original price
$289.99
Original price
$289.99
$289.99
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$289.99
Current price
$289.99
Low stock
4G63 Evo Head Stud Kit 11mm Part # ARP 207-4203
Original price
$289.99
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Original price
$289.99
Original price
$289.99
$289.99
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$289.99
Current price
$289.99
Nissan GTR RB26DETT Custom Age 625+ Head Stud Kit 202-4208
Original price
$1,499.00
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Original price
$1,499.00
Original price
$1,499.00
$1,499.00
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$1,499.00
Current price
$1,499.00
This is a special order item, please allow an extra 5 working days for delivery on your purchase. Part # ARP 202-4208
Original price
$1,499.00
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Original price
$1,499.00
Original price
$1,499.00
$1,499.00
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$1,499.00
Current price
$1,499.00
ARP Head Stud Kit CA625+ Toyota 1JZ / 2JZ 203-4301
Original price
$1,059.00
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Original price
$1,059.00
Original price
$1,059.00
$1,059.00
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$1,059.00
Current price
$1,059.00
2JZ CA625+ Head Stud Kit Part # ARP 203-4301
Original price
$1,059.00
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Original price
$1,059.00
Original price
$1,059.00
$1,059.00
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$1,059.00
Current price
$1,059.00
Mitsubishi 2.0L (4B11) Turbo CA625+ Head Stud Kit 207-4207
Original price
$929.00
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Original price
$929.00
Original price
$929.00
$929.00
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$929.00
Current price
$929.00
Mitsubishi 2.0L (4B11) Turbo CA625+ Head Stud Kit Part # ARP 207-4207
Original price
$929.00
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Original price
$929.00
Original price
$929.00
$929.00
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$929.00
Current price
$929.00
Mazda Miata BP / B6 Head Stud Kit 218-4701
Original price
$319.99
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Original price
$319.99
Original price
$319.99
$319.99
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$319.99
Current price
$319.99
Low stock
Mazda Miata BP / B6 Head Stud Kit Part # ARP 218-4701
Original price
$319.99
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Original price
$319.99
Original price
$319.99
$319.99
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$319.99
Current price
$319.99
Mitsubishi 2.0L (4B11) Turbo Head Stud Kit 207-4206
Original price
$399.99
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Original price
$399.99
Original price
$399.99
$399.99
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$399.99
Current price
$399.99
Mitsubishi 2.0L (4B11) Turbo Head Stud Kit Part # ARP 207-4206
Original price
$399.99
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Original price
$399.99
Original price
$399.99
$399.99
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$399.99
Current price
$399.99
Mitsubishi 4G63 Evo M11 (Custom Age 625+) Head Stud Kit 207-4302
Original price
$779.00
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Original price
$779.00
Original price
$779.00
$779.00
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$779.00
Current price
$779.00
Mitsubishi 4G63 Evo M11 (Custom Age 625+) Head Stud Kit Part # ARP 207-4302
Original price
$779.00
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Original price
$779.00
Original price
$779.00
$779.00
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$779.00
Current price
$779.00
Mitsubishi 4G63 VR4 12mm Head Stud Kit 207-4201
Original price
$239.99
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Original price
$239.99
Original price
$239.99
$239.99
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$239.99
Current price
$239.99
Low stock
4G63 VR4 12mm Head Stud Kit Part # ARP 207-420
Original price
$239.99
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Original price
$239.99
Original price
$239.99
$239.99
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$239.99
Current price
$239.99
Nissan SR20 GTiR 12mm ARP Head Stud Kit 202-4303
Original price
$349.99
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Original price
$349.99
Original price
$349.99
$349.99
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$349.99
Current price
$349.99
In stock
Nissan GTiR SR20DET 12mm Head Stud Kit with 12 Point Nuts It is for good reason that virtually every top professional engine builder relies on ARP ...
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Original price
$349.99
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Original price
$349.99
Original price
$349.99
$349.99
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$349.99
Current price
$349.99
Nissan CA18DET Head Stud Kit 202-4702
Original price
$299.99
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Original price
$299.99
Original price
$299.99
$299.99
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$299.99
Current price
$299.99
CA18 Head Stud Kit Part # ARP 202-4702
Original price
$299.99
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Original price
$299.99
Original price
$299.99
$299.99
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$299.99
Current price
$299.99
Subaru EJ20 / EJ25 2.0L / 2.5L DOHC CA625+ Head Stud Kit 260-4704
Original price
$1,239.00
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Original price
$1,239.00
Original price
$1,239.00
$1,239.00
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$1,239.00
Current price
$1,239.00
Part # ARP 260-4704
Original price
$1,239.00
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Original price
$1,239.00
Original price
$1,239.00
$1,239.00
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$1,239.00
Current price
$1,239.00