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GM Duramax 6.6L L5P CA625+ Head Stud Kit
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GM Duramax 6.6L L5P CA625+ Head Stud Kit

GM Duramax 6.6L L5P CA625+ Head Stud Kit

$530.30

Original: $1,767.66

-70%
GM Duramax 6.6L L5P CA625+ Head Stud Kit—

$1,767.66

$530.30

The Story

ARP Custom Age 625+ Head Stud Kit

For Chevy/GMC 6.6L Duramax L5P (2017–Present)

For the L5P owner who demands the absolute maximum in engine reinforcement, the CA625+ Head Stud Kit represents the pinnacle of fastener technology. While the L5P platform is incredibly stout from the factory, extreme builds pushing high boost levels or heavy nitrous loads can exceed the limits of standard fasteners.

The Custom Age 625+ series is the "nuclear option" for the 2017+ Duramax, offering a level of tensile strength and yield protection that is virtually unmatched in the diesel aftermarket.

 

Key Features & Benefits

  • Custom Age 625+ Super-Alloy: This ultra-premium material delivers a typical tensile strength of 260,000–280,000 psi. It is designed to handle the massive cylinder pressures found in competition-level L5P builds.

  • Ultimate Fatigue Resistance: Engineered to withstand the constant heat cycles and extreme vibrations of a high-performance diesel engine without losing its clamping preload.

  • Superior Gasket Sealing: By providing roughly 30% more strength than the standard ARP2000® kit, these studs ensure the cylinder head remains perfectly mated to the block, even under triple-digit boost pressures.

  • Corrosion Immunity: The 625+ alloy is naturally resistant to the harsh environment of an engine bay, ensuring the hardware remains serviceable and structurally sound for the life of the engine.

  • Precision Broached: Features broached ends for easy installation with an Allen wrench, allowing you to bottom out the studs in the block with precision.

 

Why Choose the 230-4302 over the 230-4301?

If your L5P is staying relatively stock or has a mild "street" tune, the standard ARP2000 (230-4301) is often sufficient. However, if you are building a dedicated drag truck, a high-horsepower sled puller, or a compound-turbo street beast, the 230-4302 is the only way to go.

The L5P head design and cooling jackets are highly efficient, but they rely entirely on the fastener to maintain that seal. The Custom Age 625+ material provides the highest safety margin available, preventing "head lift" and protecting your expensive engine investment from catastrophic gasket failure.

Complete Package: This premium kit includes all studs, 12-point nuts, parallel-ground washers, and the essential ARP Ultra-Torque fastener lubricant.

Description

ARP Custom Age 625+ Head Stud Kit

For Chevy/GMC 6.6L Duramax L5P (2017–Present)

For the L5P owner who demands the absolute maximum in engine reinforcement, the CA625+ Head Stud Kit represents the pinnacle of fastener technology. While the L5P platform is incredibly stout from the factory, extreme builds pushing high boost levels or heavy nitrous loads can exceed the limits of standard fasteners.

The Custom Age 625+ series is the "nuclear option" for the 2017+ Duramax, offering a level of tensile strength and yield protection that is virtually unmatched in the diesel aftermarket.

 

Key Features & Benefits

  • Custom Age 625+ Super-Alloy: This ultra-premium material delivers a typical tensile strength of 260,000–280,000 psi. It is designed to handle the massive cylinder pressures found in competition-level L5P builds.

  • Ultimate Fatigue Resistance: Engineered to withstand the constant heat cycles and extreme vibrations of a high-performance diesel engine without losing its clamping preload.

  • Superior Gasket Sealing: By providing roughly 30% more strength than the standard ARP2000® kit, these studs ensure the cylinder head remains perfectly mated to the block, even under triple-digit boost pressures.

  • Corrosion Immunity: The 625+ alloy is naturally resistant to the harsh environment of an engine bay, ensuring the hardware remains serviceable and structurally sound for the life of the engine.

  • Precision Broached: Features broached ends for easy installation with an Allen wrench, allowing you to bottom out the studs in the block with precision.

 

Why Choose the 230-4302 over the 230-4301?

If your L5P is staying relatively stock or has a mild "street" tune, the standard ARP2000 (230-4301) is often sufficient. However, if you are building a dedicated drag truck, a high-horsepower sled puller, or a compound-turbo street beast, the 230-4302 is the only way to go.

The L5P head design and cooling jackets are highly efficient, but they rely entirely on the fastener to maintain that seal. The Custom Age 625+ material provides the highest safety margin available, preventing "head lift" and protecting your expensive engine investment from catastrophic gasket failure.

Complete Package: This premium kit includes all studs, 12-point nuts, parallel-ground washers, and the essential ARP Ultra-Torque fastener lubricant.