

Fleece Performance Engineering FPE-34200 High Pressure Fuel Line 8MM x 3.5MM Line M14X1.5 Nuts
Fits: RAM • Chevrolet • GMC • Ford
Diesel Dollars is Southern Diesel Supply's Loyalty Program. Purchasing with Us Earns you 1 Point for every 1 Dollar spent to use for future buys!
By ordering the Fleece Performance Engineering FPE-34200 High Pressure Fuel Line 8MM x 3.5MM Line M14X1.5 Nuts you will earn 43 DIESEL DOLLARS in your SDS Fuel Tank!
The Fleece Performance Engineering FPE-34200 is a high pressure fuel line made from 8mm x 3.5mm line with M14x1.5 nuts. It comes in 19 lengths from 7 to 24 inches, so you can match the run you are building or replacing instead of making a stock length work. It is sold by size, not by truck.
Fitment
This line is not listed for a specific year, make or engine. You choose it by size. Match three things to your job: the line size (8mm x 3.5mm), the nut thread (M14x1.5) and the length. Lengths run from 7 inches to 24 inches in 1-inch steps, plus a 15.5-inch option. If you are replacing an existing line and are not sure of its size or thread, call us with your VIN and what you are working on, and we will help you check it before you order.
Why this part
A high pressure line only works if the size, the fittings and the length are all right. Fleece offers this one in 19 lengths with the same 8mm x 3.5mm line and M14x1.5 nuts on every one, so the only thing you have to pick is how long it needs to be. High-pressure injection lines are part of the Fleece engine lineup, alongside its Freedom Series cylinder heads.
What you get
- 7-24 inch High Pressure Fuel Line, in the length you select
- 8mm x 3.5mm line
- M14x1.5 nuts
Specifications
- Part number: FPE-34200, sold by length
- Line: 8mm x 3.5mm
- Nuts: M14x1.5
- Lengths: 7, 8, 9, 10, 11, 12, 13, 14, 15, 15.5, 16, 17, 18, 19, 20, 21, 22, 23 and 24 inches
- Part numbers: FPE-34200-7 through FPE-34200-24, including FPE-34200-15.5; the number after the last dash is the length in inches
About Fleece Performance Engineering
Brothers Brayden and Chase Fleece started Fleece Performance Engineering in 2008, and the company is headquartered in Pittsboro, Indiana. Fleece is known for Freedom Series cylinder heads, PowerFlo lift pumps and turbochargers, and it also builds fuel, cooling and transmission line kits for Cummins, Duramax and Powerstroke trucks. Shop Fleece Performance Engineering.
Frequently asked questions
How do I pick the right length?
Measure the run you need to cover and pick the closest length between 7 and 24 inches. If your measurement lands between two sizes, call us before you order and we will talk it through.
What does M14x1.5 mean?
It is the nut thread: 14mm diameter with a 1.5mm thread pitch. Whatever the line connects to needs to match that thread.
Will this fit my truck?
It is not listed for a specific truck. It fits where an 8mm x 3.5mm line with M14x1.5 nuts is called for. Check your existing line and fittings, or call us with your VIN.
Questions on fitment? Call the shop at the number in the header. We install everything we sell.

Diesel Dollars is Southern Diesel Supply's Loyalty Program. Purchasing with Us Earns you 1 Point for every 1 Dollar spent to use for future buys!
By ordering the Fleece Performance Engineering FPE-34200 High Pressure Fuel Line 8MM x 3.5MM Line M14X1.5 Nuts you will earn 43 DIESEL DOLLARS in your SDS Fuel Tank!


