Product Description
Fabricators and engine builders: stop fighting old, pre-bent factory lines. The FLEECE FPE-34200-12 12 INCH HIGH PRESSURE FUEL LINE gives you a straight 12" section of 8mm x 3.5mm tubing with M14 x 1.5 nuts on each end, ready to bend exactly how your common-rail or high-pressure diesel setup demands. This OEM-quality line is built for serious pressure, clean routing, and professional-looking installs.
Why this Fleece 12" high pressure line belongs in your build
- Straight 12" stick for precise custom bends and routing
- 8mm x 3.5mm tubing with M14 x 1.5 nuts for common CP3, rail, and injector interfaces
- OEM-grade steel construction for true high-pressure diesel service
- Perfect for custom twin/dual CP3 plumbing, injector line reroutes, and race builds
Fitment / Use Cases
Type: Universal high-pressure hard line for diesel/common-rail fuel systems
Length: 12 inches (straight stick)
Tube size: 8mm x 3.5mm line
End nuts: M14 x 1.5 threaded nuts on both ends
Common uses: Custom injector lines, CP3/CP4 feed or return, rail jumpers, compound turbo fuel plumbing, and any high-pressure diesel application that needs a clean, serviceable hard line where 8mm tube and M14 x 1.5 seats are appropriate.
Cross-Reference / Related Fleece Items (CPP Diesel only)
- FLEECE FPE-34200-7 7 INCH HIGH PRESSURE FUEL LINE 8MM X 3.5MM LINE M14 X 1.5 NUTS
- FLEECE FPE-34200-8 8 INCH HIGH PRESSURE FUEL LINE 8MM X 3.5MM LINE M14 X 1.5 NUTS
- FLEECE FPE-34200-10 10 INCH HIGH PRESSURE FUEL LINE 8MM X 3.5MM LINE M14 X 1.5 NUTS
- FLEECE FPE-34200-11 11 INCH HIGH PRESSURE FUEL LINE 8MM X 3.5MM LINE M14 X 1.5 NUTS
- FLEECE FPE-34200-13 13 INCH HIGH PRESSURE FUEL LINE 8MM X 3.5MM LINE M14 X 1.5 NUTS
- VIEW ALL FLEECE HIGH PRESSURE FUEL LINES AT CPP DIESEL
It is considered universal high-pressure hard line. As long as your system uses 8mm x 3.5mm tubing with M14 x 1.5 seats, you can bend and route this line to work in many diesel/common-rail applications.
Can I bend this line without damaging it?
Yes. Use a quality 8mm tubing bender and form smooth, gradual bends. Avoid kinks and do not over-bend near the flare/seal area to maintain seat integrity and pressure capability.
Does it come pre-bent for a specific cylinder or rail port?
No. This is a straight 12" stick designed to be custom-bent. That’s what makes it ideal for custom turbo, dual CP3, and race setups where factory line shapes no longer fit.
What pressure rating is it designed for?
It is built as an OEM-style high-pressure common-rail hard line intended for modern diesel injection pressures when correctly installed and supported, similar to factory lines.
Is there a Proposition 65 warning?
Yes. This product carries a California Proposition 65 warning for Cancer and Reproductive Harm. See the link in the Specifications table below for more information.
Specifications for FLEECE FPE-34200-12
| Attribute | Value |
|---|---|
| Brand | Fleece Performance Engineering |
| Part Number | FPE-34200-12 |
| UPC | 635909313205 |
| GTIN | 00635909313205 |
| Length | 12 inches (straight) |
| Line Size | 8mm x 3.5mm hard line |
| End Nut Thread | M14 x 1.5 on both ends |
| Material | Steel (OEM-style high-pressure line) |
| Compatibility / Use | Universal high-pressure diesel/common-rail applications requiring 8mm tube with M14 x 1.5 ends |
| Cross Reference | FPE-34200-7; FPE-34200-8; FPE-34200-10; FPE-34200-11; FPE-34200-13 |
| E-codes | Not applicable |
| Shipping Method | Standard ground (small parcel) |
| Package Dimensions / Weight | Approx. 12" x 1.5" x 2", ~1 lb (typical listing) |
| Country of Origin | USA (commonly listed) |
| Prop 65 | Cancer and Reproductive Harm – www.P65Warnings.ca.gov |
