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ARP 218-5401 Pro Series Main Studs for Mazda Miata 1.8L

(1989-2005 Mazda Miata; 1990-2000 Mazda Protege; 1990-1991, 1993-1994 Mazda 323)

Manufacturer

Picture for manufacturer ARP

Part Number

218-5401
5 reviews
Sale Price

$115.91

In Stock (10)

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Usually delivered within 2 days

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Product Details

The ARP 218-5401 Pro Series Main Stud Kit is specifically engineered for the Mazda Miata 1.8L engine, providing a superior fastening solution for the main bearing caps. Main studs offer significant advantages over factory bolts by eliminating main cap walk and fretting, which can lead to catastrophic engine failure under high stress conditions.

Key Benefits:

  • Prevents main cap movement and fretting under high loads
  • Protects engine block threads from damage during installation and removal
  • Provides more accurate and consistent torque loading compared to bolts
  • Manufactured from premium materials with superior tensile strength
  • Precision thread rolling for improved fatigue resistance
  • Essential for high-performance and racing applications

ARP manufactures these studs in-house using proprietary materials and processes, ensuring consistent quality and reliability. The Pro Series design features heat-treated, precision-machined studs that exceed OEM specifications. Each kit includes all necessary studs, washers, and premium-grade nuts for a complete main cap fastening solution.

Products specifications

Fits

1989-2005 Mazda Miata; 1990-2000 Mazda Protege; 1990-1991, 1993-1994 Mazda 323

Fastener Nut Style

Standard 12-point

Fastener Style

Stud

Fastener Yield Strength (psi)

200,000 psi

Main Bolt Style

2-bolt

Nuts Included

Yes

Quantity

Sold as a kit.

Washers Included

Yes

Works with Windage Tray

No

very good but the shipping cost that's out there

Easy to locate part. Good experience

Good site everything does what it's supposed to do.

Excellent transaction, received item very quickly and it was a lot cheaper than any other online retailer that I was able to find, could not even find cheaper on e bay.

Bought an Autometer Ultra lite 2 pyrometer and it looks great. Autoplicity has the best prices on their products and ships their products very quickly. I will definetly buy from them again.

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