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ARP/5150 AutoSports Custom Age 625+ Head Stud Kit (S54)
ARP/5150 AutoSports Custom Age 625+ Head Stud Kit (S54)

ARP/5150 AutoSports Custom Age 625+ Head Stud Kit (S54)

ARP/5150 AutoSports Custom Age 625+ Head Stud Kit (S54)

ARP/5150 AutoSports Custom Age 625+ Head Stud Kit (S54)

Original price was: £1,042.02.Current price is: £937.44.

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Original price was: £1,042.02.Current price is: £937.44.

The ARP 201-4303 head stud kit is custom-designed for the BMW S54 engine and serves as a replacement for the original BMW head bolts – that kit was designed for a wide range of applications including moderate boost, but for those wanting to push the boundaries of boost and horsepower, there is a further improvement to be made.

By installing ARP head studs on an S54 engine, you can enjoy several benefits, including increased clamping force and improved head gasket sealing, which can help prevent head gasket failure. This is especially crucial for high-performance, stroker, supercharged, or turbocharged engines, where increased cylinder pressure can place extra stress on the head gasket and bolts.

ARP’s 201-4303 (ARP2000 material) kit boasts a tensile strength of 220,000 psi, while this Custom Age 625+ material has a tensile strength of 280,000 psi.

This Custom Age Head Stud Kit is essential for those wanting to push the boundaries of performance.

Learn more about 5150 AutoSport here.

Availability: Reserve for delivery. This item is not on the shelf at Hack Engineering, but your order will be processed and delivered as quickly as possible.
Lead Time: Can vary - please contact us. SKU: ARP-HSK-S54-CA Categories: Engine Components, E46 M3, BMW Z3 M, BMW Z4 M, BMW S54, 5150 AutoSport, SALE/CLEARANCE

Description

Installation Instructions: 

1. To ensure proper thread engagement and accurate torque readings, clean ALL threads in the block. Chase if necessary with ARP Thread Chaser.
2. Clean and inspect all hardware prior to installation. Look for obvious defects or shipping damages, plus proper fit, length and dimension.
3. If the cylinder head studs protrude into a water jacket, lubricate the block threads of the studs with ARP THREAD SEALER.
4. Screw studs into the block “HAND TIGHT ONLY”.
5. Install the cylinder head(s) and check for binding or misalignment.
6. Lubricate the stud threads, nuts and washers with ARP ULTRA-TORQUE FASTENER ASSEMBLY LUBRICANT.
Then install the washers and the nuts onto the studs and tighten them hand tight.
ARP recommends using the ARP ULTRA-TORQUE FASTENER ASSEMBLY LUBRICANT that is provided with each kit as opposed to motor oil. This is due to higher friction on the studs as well as inconsistencies in the clamping force of the fasteners when motor oil or other low quality lubricants are used.
PRELOAD (TORQUE) RECOMMENDATIONS
7. Following the manufacturers recommended torque sequence tighten the nuts steps 1-3
CA 625+
Step 1: Tighten to 35 ft-lbs.
Step 2: Tighten to 70 ft-lbs.
Step 3: Tighten to 100 ft-lbs.
with ARP Ultra-Torque fastener assembly lubricant
Bolt Torque Sequence
 12 10 4 2 6 8 14
13 7 5 1 3 9 11

 

Please note: After initial assembly, it is necessary to allow the engine to complete a full heat cycle, then re-torque your head studs to spec. This means allowing the engine to warm up to its normal operating temperature, remain at operating temperature for several minutes to ensure each component is uniformly heated, then turned off and cooled completely to ambient temperature.