Product Description
The FLEECE FPE-34070 3/8 INCH BILLET ALUMINUM UNIVERSAL BLOCK OFF PLUG is a simple but critical piece for any custom diesel or performance build. CNC-machined from high-quality 6061 billet aluminum, this universal plug is perfect for sealing unused 3/8 inch ports and hose ends in fuel, oil, or coolant systems. Whether you are deleting a component, rerouting lines, or cleaning up your engine bay, this Fleece block off plug delivers a secure, leak-free seal in a compact, lightweight package.
Key Features
- Precision CNC-machined from 6061 billet aluminum for strength and durability
- Universal design for 3/8 inch hose or port applications
- Compact and lightweight for a clean, professional installation
- Corrosion-resistant finish for long-term reliability
- Ideal for fuel, oil, or coolant system block-off needs
Fitment / Use Cases
Universal fit: Designed for use with 3/8 inch hose or ports in a wide range of automotive and diesel applications.
Typical uses: Sealing unused fuel return lines, coolant ports, or auxiliary fittings after system modifications, component deletions, or custom plumbing work.
Vehicle type: Universal – suitable for diesel and gas performance builds where a high-quality 3/8 inch block off plug is required.
Cross-Reference / Related Fleece Products (CPP Diesel)
- FLEECE FPE-34071 1/2 INCH BILLET ALUMINUM UNIVERSAL BLOCK OFF PLUG
- FLEECE FPE-34139 5/8 INCH BILLET ALUMINUM UNIVERSAL BLOCK OFF PLUG
- FLEECE FPE-34113 7/8 INCH BILLET ALUMINUM UNIVERSAL BLOCK OFF PLUG
This plug seals unused 3/8 inch ports or hose ends in your fuel, oil, or coolant systems. It prevents fluid leaks and helps you safely delete or reroute components without leaving open lines.
Is this plug vehicle-specific?
No. The FPE-34070 is a universal 3/8 inch billet aluminum block off plug. As long as you are working with a compatible 3/8 inch hose or port, you can use this plug in almost any custom or OEM application.
What systems can I use this in?
It is commonly used in fuel, oil, and coolant systems on performance diesels, but it can also be used anywhere a 3/8 inch line or port needs to be safely blocked off.
Do I need any special tools to install it?
Installation is straightforward and typically only requires basic hand tools. Simply insert the plug into the appropriate 3/8 inch hose or port and secure it according to your system’s requirements.
Does this part have a Proposition 65 warning?
Yes. As with many automotive performance parts, a California Proposition 65 warning applies. See the Specifications table for more details.
Specifications for FLEECE FPE-34070
| Attribute | Value |
|---|---|
| Brand | Fleece Performance Engineering |
| Part Number | FPE-34070 |
| UPC | 635909312116 |
| GTIN | 00635909312116 |
| Material | 6061 Billet Aluminum |
| Diameter / Size | 3/8 inch (universal port / hose size) |
| Universal | Yes – 3/8 inch applications |
| Vehicle Type | Truck/SUV and general automotive (universal) |
| Cross Reference | FPE-34071; FPE-34139; FPE-34113 (other Fleece billet block off plugs) |
| E-codes | Not applicable |
| Country of Origin | USA |
| Shipping Method | Standard ground (small parcel) |
| Prop 65 | Cancer and Reproductive Harm – www.P65Warnings.ca.gov |
