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ARP Mazda Miata main stud kit
Complete set of main studs for 1.6L 16v - B6 and 1.8L 16v - BP
Original ARP product 218-4701
Complete main stud set from ARP for the Mazda Miata 1.6L 16v - B6 and 1.8L 16v - BP engines. Recommended for high boost pressures. At the same time these studs are reusable in contrast to the OE screws.
World-leading Fastener Technology
- ARP started applying technology to race fastener design and manufacturing in 1968. We'll discuss five components of fastener technology in detail.
- Today's critical diesel fasteners - head studs and bolts, main studs and bolts, and driveline - have been designed stronger than ever before to handle the extreme loads. As a results, installation pre-loads - the amount the fastener is stretched during installation - are very high. Installation Methods
- There are three methods that can be employed to determine how much tension is exerted on a fastener; using a torque wrench, measuring the amount of stretch, and turning the fastener a pre-determined amount (torque angle). Of these methods, use of a stretch gauge is the most accurate.
- The following material is intended to provide a brief overview of the metallurgical considerations that influence the design and production of the most reliable fasteners in motorsports. It is hoped that a simple understanding of the knowledge and commitment required to produce this reliability will make your future fastener decisions much, much easier.
- The materials ARP uses in fastener manufacturing are listed and compared.
- SDF (guaranteed seamless and defect free).
- CHQ (cold head quality).
- Aircraft.
- Commercial.
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There are six types of metallurgical failures that affect fasteners. Each type has unique identifying physical characteristics. The following examples are designed to be used like a spark plug reading chart to help analyze fastener failures.
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ARP uses only the first two (SDF and CHQ), even though they cost more than double “Aircraft” quality.
- Availability: order on customer request

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