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SKU: 202-5406 | UPC: 672036007515
ARP Nissan L24 L26 L28 Series 6-Cylinder Main Stud Kit 1974-1983 260Z 280Z 280ZX
ARP main stud kit 202-5406 upgrades Nissan L24 L26 L28 inline-six engines with high-strength fasteners. Designed for 1974-1983 Nissan 260Z 280Z and 280ZX models this kit ensures consistent clamp load to handle high horsepower builds. Perfect for rebuilds demanding precision and reliability under extreme conditions.
Key Features
- ARP2000 Alloy Construction: Rated at 220,000 psi tensile strength for extreme clamping force without failure
- Stud Design: Minimizes main cap movement and block thread damage compared to bolts
- Rolled Threads: Provides 1000% greater fatigue resistance and accurate torque values
- Matched Hardware: Includes washers nuts and instructions for complete easy assembly
- Versatile Application: Supports stock refreshes to 1000+ HP turbo setups in Z cars
Product Notes
- Inspect engine block mains before installation for wear or damage
- Use ARP Ultra-Torque lubricant on threads and under nuts for accurate torque
- Ships in protective ARP packaging to prevent thread damage
Installation Notes
- Professional installation recommended.
- Torque to ARP specs: mains 90-100 ft-lbs in sequence with moly lube
- Compatible with factory main caps. re-torque after 500 miles or heat cycles
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1974-1975 | Nissan | 260Z | 2+2 |
| 1974-1975 | Nissan | 260Z | Base |
| 1975-1978 | Nissan | 280Z | 2+2 |
| 1975-1978 | Nissan | 280Z | Base |
| 1979-1983 | Nissan | 280ZX | 2+2 |
| 1979-1983 | Nissan | 280ZX | Base |
| 1980-1981 | Nissan | 280ZX | 2+2 GL |
| 1980-1981 | Nissan | 280ZX | GL |
| 1981 | Nissan | 280ZX | GL |
| 1982-1983 | Nissan | 280ZX | 2+2 Turbo |
| 1981 | Nissan | 280ZX | GL Turbo |
| 1982-1983 | Nissan | 280ZX | Turbo |
Why Choose ARP?
- Proven in NHRA Top Fuel and Pro Stock racing for decades
- Every fastener exceeds OEM strength by wide margin
- CNC-machined from premium alloy with exact OEM sizing
Frequently Asked Questions
-
Q: Will this kit fit L28ET turbo engines in 280ZX?
A: Yes fits all L24 L26 L28 variants including turbocharged L28ET in 1981-1983 280ZX models with stock main caps -
Q: What material are the studs made from?
A: ARP2000 chrome moly alloy with rolled threads for maximum strength and fatigue resistance -
Q: Is a torque wrench required for installation?
A: Yes use a calibrated torque wrench and follow ARP sequence: center mains first then outward. includes full guide
Shipping & Handling
- Method: UPS Ground or USPS Priority
- Availability: In stock - ships same or next business day
- Packaging: Sealed ARP box 8 x 6 x 2 inches
- Weight: 1.95 lbs
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