SKU: 206-4201 | UPC: 672036007966
ARP Cylinder Head Studs for BMC A Series Engines 1958-2000 9 Studs 12-pt Nuts
ARP 206-4201 Pro Series cylinder head studs deliver exceptional clamping force for BMC A-Series engines found in Mini MG Midget Austin Healey Sprite and similar models. These 9-stud kits with 12-point nuts use premium 8740 Chrome Moly alloy heat-treated to 190000 PSI for high-performance builds. Engine builders choose ARP for consistent stretch precise alignment and gasket sealing under extreme pressures.
Key Features
- 8740 Chrome Moly Alloy: Heat-treated to 190000 PSI tensile strength ensures complete penetration and durability far beyond standard studs.
- Centerless Ground: Precision machining creates concentric straight studs so cylinder heads and gaskets align perfectly without binding.
- Thread Rolled After Heat-Treat: Provides 2000% higher fatigue strength compared to pre-heat-treat threading for long-term reliability.
- Undercut Design on Shorter Studs: Equalizes stretch across all studs for uniform clamping force and resistance to head gasket failure.
- 12-Point Nuts and Black Finish: Secure fastening with corrosion resistance made in USA with ARP stamp for authenticity.
Product Notes
- Designed for 803cc to 1275cc BMC A-Series engines verify displacement before purchase.
- Torque to ARP specifications using ARP moly or Ultra-Torque assembly lube.
- Packaged in protective racks to prevent damage during shipping.
Installation Notes
- Professional installation recommended.
- Chase blind holes with 14mm x 1.5 tap remove all debris before installing studs.
- Compatible with stock or performance head gaskets ARP washers included.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1959-2000 | Austin/Morris/Rover | Mini | All including Cooper Metro |
| 1961-1979 | MG | Midget | MK I-III |
| 1958-1971 | Austin Healey | Sprite | MK I-IV |
| 1958-1972 | Morris | Minor | 1000 1098cc |
| 1967-1971 | Riley/Wolseley | 1.3/1300 | All |
Why Choose ARP?
- Relied on by top professional engine builders for all-out competition engines.
- Vertical rack heat-treatment and proprietary processes for unmatched consistency.
- Exacting tolerances and ARP2000 alloy options available for demanding applications.
Frequently Asked Questions
- Q: Does this kit fit all BMC A-Series engines?
A: Yes fits 803cc 848cc 998cc 1098cc and 1275cc A-Series in Mini Midget Sprite and similar verify your engine code. - Q: What is the material and finish?
A: 8740 Chrome Moly alloy black oxide finish for strength and corrosion protection threads rolled post-heat-treat. - Q: What is the warranty and torque specs?
A: ARP lifetime warranty against failure torque studs to 65 ft-lbs in sequence using ARP lubricant.
Shipping & Handling
- Method: UPS Ground USPS Priority
- Availability: In stock – ships same or next business day
- Packaging: Protective box 8 x 6 x 2 inches
- Weight: 1.1 lbs
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