Product Description
Build a clean, reliable high-pressure fuel system with the FLEECE FPE-34200-21 21 INCH HIGH PRESSURE FUEL LINE. This universal 21 inch line uses an 8mm x 3.5mm tube with M14 x 1.5 nuts, giving fabricators and engine builders an OEM-style solution for CP3 conversions, common rail upgrades, and custom fuel system layouts.
Key Features
- 21 inch high-pressure fuel line for universal diesel applications
- 8mm x 3.5mm line size with M14 x 1.5 nuts for common rail systems
- OEM-style construction for consistent fuel flow and durability
- Ships straight so you can bend it for your exact routing needs
- Ideal for CP3 conversions, custom lines, and clean engine bay builds
Fitment / Usage
Application Type: Universal high-pressure fuel line for diesel common rail and CP3-based fuel systems.
Typical Uses: Custom CP3 conversion plumbing, replacement high-pressure lines, and custom fuel system layouts on Cummins, Duramax, and other modern diesel platforms where 8mm line and M14 x 1.5 fittings are required.
Line Style: Supplied straight; bend to suit your specific routing using a proper tubing bender.
Cross-Reference / Related Fleece Products on CPP Diesel
- FLEECE FPE-34200-10 10 INCH HIGH PRESSURE FUEL LINE 8MM X 3.5MM LINE M14 X 1.5 NUTS
- FLEECE FPE-34200-12 12 INCH HIGH PRESSURE FUEL LINE 8MM X 3.5MM LINE M14 X 1.5 NUTS
- FLEECE FPE-HFFL-1018 2010-2018 CUMMINS 0.5 INCH HIGH FLOW FEED LINE KIT (OEM FILTER TO CP3)
- FLEECE FPE-CUMM-SSFTN STAINLESS STEEL FUEL SUPPLY TUBE NUTS FOR 5.9/6.7L CUMMINS
This is a universal high-pressure fuel line. It is sized and threaded for many modern diesel common rail systems (8mm x 3.5mm line, M14 x 1.5 nuts), and is intended to be bent and routed to fit your custom application.
Do I need a special tool to bend this line?
For a professional, kink-free bend, a quality hand tubing bender is strongly recommended. This preserves the internal diameter and ensures consistent fuel flow in high-pressure systems.
Can I use this with a CP3 conversion on my Cummins?
Yes, many builders use these Fleece universal lines in CP3 conversion and custom common rail layouts. Always verify length, routing, and clearance for your exact setup before final installation.
Is this an OEM replacement part?
It is OEM-style in construction and quality but sold as a universal high-pressure line. That makes it perfect for custom projects where factory lines no longer fit the new configuration.
Does this product have a Prop 65 warning?
Yes. Like many metal and coated components, it carries a California Proposition 65 warning for cancer and reproductive harm. See the Specifications table for details.
Specifications for FLEECE FPE-34200-21
| Attribute | Value |
|---|---|
| Brand | Fleece Performance Engineering |
| Part Number | FPE-34200-21 |
| UPC | 635909313298 |
| GTIN | 635909313298 |
| Length | 21 inches (533 mm) |
| Line Size | 8mm x 3.5mm high-pressure fuel line |
| Nut Thread | M14 x 1.5 |
| Material / Construction | OEM-style high-pressure steel fuel line |
| Compatibility | Universal; for diesel common rail / CP3-based high-pressure fuel systems using 8mm line and M14 x 1.5 fittings |
| Cross Reference (Fleece on CPP) | FPE-34200-10; FPE-34200-12; FPE-HFFL-1018; FPE-CUMM-SSFTN |
| E-codes | Not applicable |
| Shipping Weight | Approx. 1.0 lb |
| Package Dimensions | Approx. 21 in (L) x 2 in (W) x 2 in (H) |
| Shipping Method | Standard ground (small parcel) |
| Fuel Type | Diesel high-pressure fuel systems |
| Prop 65 | Cancer and Reproductive Harm – www.P65Warnings.ca.gov |
