Head Stud and Valve Spring COMBO 4

Elevate your engine’s performance with our Head Stud and Valve Spring Combo 5 – a comprehensive package designed to enhance the strength and reliability of your setup. This combo is perfect for those considering valve spring upgrades or head stud replacements, ensuring a seamless and effective solution for your engine needs.

Atomic Competition Fasteners – Ford Falcon Barra XR6 4.0L Head Stud Kit (H13 Tool Steel)

Key Features:

• • H-11 Tool Steel Construction – Superior strength to handle high cylinder pressures from modern turbo setups.
  • Bottoming Tab Design – Ensures proper thread engagement and preload, with easy adjustability for varying thread depths (up to 10mm variation).
  • Oversized Head Stud Washers – CNC machined from 4140 chrome moly to spread the combustion load more evenly across the head bolt boss, preventing crushing and maintaining fastener preload at high boost levels.
  • Fitment – No need for sump modifications or excessive stud trimming. Atomic studs are designed to fit perfectly with no hassle.
  • Performance Proven – These studs have been tested and proven on vehicles producing 750+ rwkw.

Atomic Performance Valve Springs

#306800 – Extreme Duty Valve Springs to suit Ford DOHC 6 Cylinder Engines

• Tension: 80 lbs at 1.490″
• Tension at .500” valve lift: 175 lbs
• Coil bind: 23.5mm/220 lbs
• Recommended for boost levels not exceeding 1.8 bar (27lbs)
• Uses standard retainers or Atomic