ARP Head Stud Kit
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ARP Head Stud Kit - Mazda B6 / BP - MX-5 (NA / NB)
This ARP head stud kit suits the B6 1.6 / BP 1.8 engine in the Mazda MX-5 NA / NB. It swaps the factory head bolts for studs, nuts and washers. The studs are wound into the block by hand and the head is clamped by torquing the nuts, which gives more even, repeatable clamping than factory stretch bolts and saves wear on the block threads each time the head comes off.
More clamping load helps the head gasket seal against high cylinder pressure, which is why head studs are one of the first parts fitted to a boosted or high-compression build.
See the Vehicle Fitment tab for the full list of vehicles.
Note: Installation by a professional is recommended.
Features
- Made in the USA by ARP
- Thread / diameter: M11 x 1.5
- ARP torque spec: 65 ft-lb (88 Nm) in three steps with ARP Ultra-Torque
- Installation instructions available from ARP (see Technical Specifications)
Shop more: ARP
Need help choosing parts? Contact our team at sales@chicaneaustralia.com.au.
Vehicle Compatibility
| Make | Model | Chassis | Years | Engine / Notes |
|---|---|---|---|---|
| Mazda | MX-5 | NA | 1989–1997 | B6 1.6 / BP 1.8 |
| Mazda | MX-5 | NB | 1998–2005 | BP 1.8 |
Technical Specifications
| Spec | Value |
|---|---|
| Brand | ARP |
| Product | Head Stud Kit |
| Engine | B6 1.6 / BP 1.8 |
| Thread / diameter | M11 x 1.5 |
| Torque (ARP Ultra-Torque) | 65 ft-lb (88 Nm) in three steps |
| Instructions | ARP instruction sheet (link below) |
| Part number(s) | 218-4701 |
Contents
1 x ARP head stud kit – studs, nuts and washers for one engine

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