Why Upgrade to ARP Header Bolts?
Because exhaust leaks, ticking noises, and constant re-tightening get old fast.
ARP’s stainless hardware is engineered to maintain consistent clamping force under extreme heat and vibration, something stock bolts struggle with.
ARP manufactures plenty of premium grade bolt and stud kits to facilitate installation of exhaust headers including the preferred stainless stud kit with 12-point nuts.
ARP 400-1208 stainless header bolts 3/8 x .750 uhl – Key Features
- Premium Stainless Steel Construction
Excellent corrosion resistance and durability in high-temperature exhaust environments. - 3/8″ Thread Size with .750″ UHL (Under Head Length)
Ideal sizing for many aftermarket header flange setups. - 12-Point Head Design
Easier access in tight engine bays and more precise torque application. - High-Strength Fasteners
Designed to hold torque through repeated heat cycles. - Precision Rolled Threads
Ensures smooth installation and consistent clamping force. - 16-Piece Kit
Suitable for most V8 header installations.
The Stainless 300 material isn’t suffering from corrosion or extreme heat, making it ideal for the application. What’s more, the compact 12-point nut allows you to easily slip a socket close to the pipe.
Ideal Applications
- Exhaust header installations and upgrades
- Small block, LS, and other V8 engine setups
- Street, track, and boosted builds
- Replacement for worn or failing header bolts
If your headers keep coming loose, this is your solution.
Each and every ARP accessory stud or bolt kit includes the specific number of parts for your application, plus premium-quality washers and hex or 12-point nuts, as required.
Why It Matters
Cheap header bolts often lead to:
- Exhaust leaks from loosening hardware
- Corrosion and seized threads
- Stripped or broken bolts during removal
The ARP 400-1208 kit provides stronger clamping and better durability, keeping your exhaust sealed and your engine running properly.
Studs are manufactured with a unique nut-starter nose that helps prevent cross-threading. Studs and bolts come either black oxide chrome moly or Stainless 300. Both are nominally rated at 170,000 psi tensile strength substantially stronger than Grade 8 hardware. Specially drilled NASCAR models are To be had for many who want to safety wire their header bolts to prevent loosening.Special NASCAR model header bolts are To be had that are drilled to be used of safety wire. Perfect for any racer who desires the ultimate in security. To be had for small block and big block Chevrolet engines, plus many universal applications. Header Bolt Kit 12Point Head 16Pieces Material Stainless Steel Size 3/8 UHL 0.75
Package Dimensions: 1.524 H x 17.78 L x 8.636 W (centimeters)
Made in USA
Header Stud/Bolts
Part number: ARP-400-1208
Installation Notes
- Use anti-seize (stainless + heat = bad combo without it)
- Torque evenly across all bolts
- Re-check torque after initial heat cycles
Translation: install them once and stop chasing leaks.
Final Verdict on ARP 400-1208 stainless header bolts 3/8 x .750 uhl
The ARP 400-1208 Stainless Header Bolt Kit is a simple but essential upgrade. Stronger, corrosion-resistant, and far more reliable than stock hardware.
Because your headers should stay tight—not test your patience.
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