SKU: 204-5405 | UPC: 672036035457
ARP Crankcase Through Bolt Kit – Porsche 3.0L & 3.3L Engines
The ARP Crankcase Through Bolt Kit is a premium high-strength fastener upgrade for Porsche 3.0L and 3.3L air-cooled engines. Engineered from ARP’s proprietary high-strength material, these through bolts provide superior clamping force and reliability compared to factory hardware. They are ideal for stock rebuilds, high-performance builds, or race applications where maximum crankcase integrity is essential.
The kit includes all necessary bolts, washers, and nuts for a complete crankcase assembly, ensuring even load distribution and preventing leaks or failures under high stress. ARP’s precision manufacturing and heat-treated construction make this the preferred choice for enthusiasts and professional builders working on classic 911, 930, and other 3.0L/3.3L Porsche models.
Key Features
- High-Strength ARP Material – Superior tensile strength and fatigue resistance
- Complete Crankcase Kit – Includes all through bolts, washers, and nuts for full assembly
- Precision Manufactured – Exact fit and consistent clamping force
- Heat-Treated Construction – Maximum durability under high RPM and boost
- Direct Replacement – Designed for Porsche 3.0L and 3.3L air-cooled engines
| Spec | Detail |
|---|---|
| Part Number | 204-5405 |
| Brand | ARP |
| Type | Crankcase Through Bolt Kit |
| Compatibility | Porsche 3.0L & 3.3L air-cooled engines |
| Material | High-Strength ARP Proprietary Alloy |
| Country of Origin | United States |
| Warranty | ARP Limited Warranty |
Whats Included
- Complete set of crankcase through bolts
- Corresponding washers and nuts
- Installation instructions
Product Notes
- Designed for Porsche 3.0L and 3.3L air-cooled engines (including 911 SC, Carrera 3.2, 930 Turbo, etc.)
- Provides significantly stronger clamping force than stock hardware
- Professional engine builder installation recommended with proper torque sequence
Installation Notes
- Requires full crankcase disassembly for installation
- Follow ARP torque specifications and sequence for proper assembly
- Professional engine builder installation is highly recommended
This Part Fits
| Year Range | Make | Model | Engine | Notes |
|---|---|---|---|---|
| Various (air-cooled era) | Porsche | 911 / 930 Turbo / SC / Carrera 3.2 | 3.0L & 3.3L | Crankcase Through Bolt Kit |
Why Choose ARP Crankcase Through Bolt Kits?
- Industry-leading strength and reliability for high-performance engines
- Precision-manufactured in the USA with ARP’s proprietary materials
- Proven in professional racing and high-horsepower street builds
Frequently Asked Questions
- Q: Does this kit fit my 1980 Porsche 911 3.0L?
A: Yes, compatible with Porsche 3.0L and 3.3L air-cooled engines across the applicable years. - Q: Are these bolts stronger than stock?
A: Yes, ARP through bolts provide significantly higher tensile strength and clamping force. - Q: Is professional installation required?
A: Yes, crankcase assembly requires precise torque procedures and should be performed by an experienced engine builder.
Shipping & Handling
- Method: Ground UPS or FedEx
- Availability: In stock – ships same or next business day
- Packaging: Secure ARP retail packaging
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