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XAT ARP Head Stud Kit 1UZ Series V8 1UZ 3UZ 2UZ UZ SC400 GS400 LS400 SC430 GS430 LS430 GX470 LX47...

XAT ARP Head Stud Kit 1UZ Series V8 1UZ 3UZ 2UZ UZ SC400 GS400 LS400 SC430 GS430 LS430 GX470 LX470 Land Cruiser Tundra Sequoia 4Runner HSK Majesta


Head studs need to be torqued to 60 ft/lbs 

XAT Racing leads the world in Toyota/Lexus V8 parts! One of the most important and integral upgrades when squeezing more power out of the UZ engines is to go with better fasteners. We've developed a custom kit (not just reused other kits) to give your V8 a bit more room to work with safely, especially if you plan on boosting it! 

What's important about these ARP studs? The factory bolts are torque to yield, meaning they are purposefully stretched after one use, and cannot be safely reused. These ARP studs can be used countless times in multiple engine builds, provided they are not stretched. Studs also give you a more solid clamping force over bolts. Check out the excerpt from ARP's catalog for an explanation we have in the pictures! 

For those looking to run more boost, more power, or just want added safety, we have also developed an ARP2000 version of our head stud kits! The added tensile strength of the ARP2000 material lets you torque the studs down further, giving you even more protection from lifting the heads and/or blowing a head gasket.

You should not have to shave the head studs down for the scissor gears for the cams. We include washers for non-VVTi applications to make installation easier.

Not rated yet
  • 1UZ, 1UZ VVTi, or 3UZ
    2UZ. 5-004
    Engine: not selected
  • $269
    • SKU
    • Weight
      4.5 lbs
    • Dimensions (L x W x H)
      8 x 6 x 3 in
  • Manufacturer
  • Engine
    1UZ, 1UZ VVTi, or 3UZ, 2UZ. 5-004
  • Hardware Kit
    Head studs only, HSK and 1UZ VVTi/3UZ Main Studs, HSK and 1UZ non-VVTi Main Studs, HSK and 2UZ Main Studs
  • Material Strength
    Standard ARP 8740 (800 HP capable), Upgrade to ARP2000 (over 800 HP)

Most product ships from either the manufacture or largest wholesale location to pass the saving to you. Most orders will ship via UPS, as we will be able to provide the best rates and have had the least issues when using UPS.

IF YOU DO NOT LIKE THE AUTOMATED SHIPPING CALCULATOR'S RATES, PLEASE CONTACT US AND WE CAN GET YOU A BETTER ONE! Especially for anyone outside the USA, please contact us with a list of parts you'd like to order, and where you are located.

We accept the following payment methods:

Also Venmo and unmarked nonsequential dollar bills

  • Fitment Type
    Vehicle Specific
Toyota/LexusCrown Majesta1995-1999 S1501UZ-FE 4.0 V8 (UZS151, UZS155, UZS157)
Toyota/LexusLexus GS/Aristo1992-1997 S1471UZ-FE 4.0 V8 non-VVTi
Toyota/LexusLexus GS/Aristo1998-2005 S1601UZ VVTi 4.0 V8 (1998-2000) UZS160
Toyota/LexusLexus GS/Aristo1998-2005 S1603UZ 4.3 V8 (2001-2005) UZS161
Toyota/LexusLexus LS/Celsior1989-1994 UCF10/11 LS400/Celsior1UZ-FE 4.0 V8 non-VVTi
Toyota/LexusLexus LS/Celsior1995-1997 UCF20/21 LS400/Celsior1UZ-FE 4.0 V8 non-VVTi
Toyota/LexusLexus LS/Celsior1998-2000 UCF20/21 LS400/Celsior1UZ-FE VVTi 4.0 V8
Toyota/LexusLexus SC/Soarer1992-2000 Z301UZ-FE non-VVTi 4.0 V8 (92-97) UZZ30/31/32
Toyota/LexusLexus SC/Soarer1992-2000 Z301UZ-FE VVTi 4.0 V8 UZZ30 (1998-2000)
Toyota/LexusLexus SC/Soarer2001-2010 Z403UZ-FE 4.3 V8
Toyota/LexusTundra2000-2006 1st Gen2UZ-FE 4.7 V8
Toyota/LexusTundra2007-2021 2nd Gen2UZ-FE 4.7 V8

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