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ARP Head Studs

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.

Filters

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  • Nissan RB20, RB25, RB30 Twin Cam Head Stud Kit 202-4301

    $369.99 - $369.99
    $369.99
    $369.99 - $369.99
    $369.99
    Low stock

    Nissan RB20, RB20DET, RB25, RB25DET Head Stud Kit Part # ARP 202-4301  

    $369.99 - $369.99
    $369.99
    $369.99 - $369.99
    $369.99

  • Nissan RB20, RB20DET, RB25, RB25DET, RB30 Twin Cam Head Stud Kit (ARP2000) ARP 202-4309

    $469.99 - $469.99
    $469.99
    $469.99 - $469.99
    $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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    $469.99 - $469.99
    $469.99
    $469.99 - $469.99
    $469.99

  • Nissan RB DOHC 1/2" ARP Head Studs AR999-4209

    $329.00 - $329.00
    $329.00
    $329.00 - $329.00
    $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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    $329.00 - $329.00
    $329.00
    $329.00 - $329.00
    $329.00

  • Nissan - Holden RB30 SOHC Head Stud Kit

    $429.00 - $429.00
    $429.00
    $429.00 - $429.00
    $429.00
    Low stock

    Nissan RB30 SOHC Head Stud kit 11mm Studs with 12 point nuts & Washers.

    $429.00 - $429.00
    $429.00
    $429.00 - $429.00
    $429.00

  • Nissan 2.0L SR20 DET M11 Head Stud Kit (Under Cut) 102-4701

    $359.00 - $359.00
    $359.00
    $359.00 - $359.00
    $359.00
    Low stock

    SR20 Head Stud Kit Part # ARP 102-4701

    $359.00 - $359.00
    $359.00
    $359.00 - $359.00
    $359.00

  • Toyota 86 Head Studs ARP2000 - 203-4305

    $499.00 - $499.00
    $499.00
    $499.00 - $499.00
    $499.00

    Special Order Only fits Toyota 4UGSE / FA20 2.0L (ARP2000)    

    $499.00 - $499.00
    $499.00
    $499.00 - $499.00
    $499.00

  • Toyota 3SGTE 12pt Head Stud Kit ARP 203-4204

    $339.99 - $339.99
    $339.99
    $339.99 - $339.99
    $339.99
    Low stock

    Part # ARP 203-4204

    $339.99 - $339.99
    $339.99
    $339.99 - $339.99
    $339.99

  • Toyota Supra 1JZ / 2JZGE/GTE 3.0L inline 6 (1993-98) Head Stud Kit ARP 203-4205

    $396.99 - $396.99
    $396.99
    $396.99 - $396.99
    $396.99
    Low stock

    Part # ARP 203-4205

    $396.99 - $396.99
    $396.99
    $396.99 - $396.99
    $396.99

  • Nissan GTR RB26DETT Custom Age 625+ Head Stud Kit 202-4208

    $1,499.00 - $1,499.00
    $1,499.00
    $1,499.00 - $1,499.00
    $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

    $1,499.00 - $1,499.00
    $1,499.00
    $1,499.00 - $1,499.00
    $1,499.00

  • Nissan GTR RB26DETT ARP2000 Head Stud Kit 202-4207

    $579.00 - $579.00
    $579.00
    $579.00 - $579.00
    $579.00
    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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    $579.00 - $579.00
    $579.00
    $579.00 - $579.00
    $579.00

  • Toyota Supra 2JZGE/GTE 3.0L inline 6 (1993-98), Custom Age 625+ Head Stud Kit 203-4301

    $1,059.00 - $1,059.00
    $1,059.00
    $1,059.00 - $1,059.00
    $1,059.00

    2JZ CA625+ Head Stud Kit Part # ARP 203-4301

    $1,059.00 - $1,059.00
    $1,059.00
    $1,059.00 - $1,059.00
    $1,059.00

  • Ford XR6 M12 Head Stud Kit 252-4302

    $589.00 - $589.00
    $589.00
    $589.00 - $589.00
    $589.00
    Low stock

    Ford XR6 M12 Head Stud Kit Part # ARP 252-4302

    $589.00 - $589.00
    $589.00
    $589.00 - $589.00
    $589.00

  • Mitsubishi 2.0L (4B11) Turbo CA625+ Head Stud Kit 207-4207

    $929.00 - $929.00
    $929.00
    $929.00 - $929.00
    $929.00

    Mitsubishi 2.0L (4B11) Turbo CA625+ Head Stud Kit Part # ARP 207-4207

    $929.00 - $929.00
    $929.00
    $929.00 - $929.00
    $929.00

  • Mazda Miata BP / B6 Head Stud Kit 218-4701

    $319.99 - $319.99
    $319.99
    $319.99 - $319.99
    $319.99
    Low stock

    Mazda Miata BP / B6 Head Stud Kit Part # ARP 218-4701

    $319.99 - $319.99
    $319.99
    $319.99 - $319.99
    $319.99

  • Mitsubishi 2.0L (4B11) Turbo Head Stud Kit 207-4206

    $399.99 - $399.99
    $399.99
    $399.99 - $399.99
    $399.99
    In stock

    Mitsubishi 2.0L (4B11) Turbo Head Stud Kit Part # ARP 207-4206

    $399.99 - $399.99
    $399.99
    $399.99 - $399.99
    $399.99

  • Mitsubishi 4G63 Evo M11 (Custom Age 625+) Head Stud Kit 207-4302

    $779.00 - $779.00
    $779.00
    $779.00 - $779.00
    $779.00

    Mitsubishi 4G63 Evo M11 (Custom Age 625+) Head Stud Kit Part # ARP 207-4302

    $779.00 - $779.00
    $779.00
    $779.00 - $779.00
    $779.00

  • Mitsubishi 4G63 Evo M11 Head Stud Kit 207-4203

    $289.99 - $289.99
    $289.99
    $289.99 - $289.99
    $289.99

    4G63 Evo Head Stud Kit 11mm Part # ARP 207-4203

    $289.99 - $289.99
    $289.99
    $289.99 - $289.99
    $289.99

  • Mitsubishi 4G63 VR4 12mm Head Stud Kit 207-4201

    $239.99 - $239.99
    $239.99
    $239.99 - $239.99
    $239.99
    Low stock

    4G63 VR4 12mm Head Stud Kit Part # ARP 207-420

    $239.99 - $239.99
    $239.99
    $239.99 - $239.99
    $239.99

  • Nissan SR20 DET Main Stud Kit 202-5402

    $259.00 - $259.00
    $259.00
    $259.00 - $259.00
    $259.00
    Low stock

    Part # ARP 202-5402

    $259.00 - $259.00
    $259.00
    $259.00 - $259.00
    $259.00
  • Pre-order

    Nissan SR20 GTiR 12mm ARP Head Stud Kit 202-4303

    $349.99 - $349.99
    $349.99
    $349.99 - $349.99
    $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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    $349.99 - $349.99
    $349.99
    $349.99 - $349.99
    $349.99
    Pre-order

  • Nissan CA18DET Head Stud Kit 202-4702

    $299.99 - $299.99
    $299.99
    $299.99 - $299.99
    $299.99

    CA18 Head Stud Kit Part # ARP 202-4702

    $299.99 - $299.99
    $299.99
    $299.99 - $299.99
    $299.99
  • Pre-order

    Subaru EJ20 / EJ25 2.0L & 2.5L DOHC Head Stud Kit 260-4701

    $495.00 - $495.00
    $495.00
    $495.00 - $495.00
    $495.00
    Coming soon

    Part # ARP 260-4701

    $495.00 - $495.00
    $495.00
    $495.00 - $495.00
    $495.00
    Pre-order

  • Subaru EJ20 / EJ25 2.0L / 2.5L DOHC CA625+ Head Stud Kit 260-4704

    $1,239.00 - $1,239.00
    $1,239.00
    $1,239.00 - $1,239.00
    $1,239.00

    Part # ARP 260-4704

    $1,239.00 - $1,239.00
    $1,239.00
    $1,239.00 - $1,239.00
    $1,239.00

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