Fuel Line Heat Shield Sleeving Sizing Guide
By DeatschWerks | Published: 2026-10-20
Category: Buying Guides
Choosing the right fuel line heat shield sleeving comes down to hose size and length. This guide explains how to match -6 AN and -10 AN sleeving to your setup.
Quick answer
Choose your fuel line heat shield sleeving by matching the AN size of your hose and measuring the length you need to cover. For most -6 AN fuel lines, a 3-foot section handles short vulnerable runs, while a 20-foot roll covers longer routes or multiple lines.
Why hose size matters
The sleeving must fit snugly over the hose without being too tight or too loose. Sleeving sized for -6 AN hose is designed for that outer diameter, so it stays in place and provides consistent protection. Using a larger size can leave gaps where heat can reach the line, while a smaller size may be difficult to install.
If you are not sure of your hose size, check the fittings or the hose markings. Most AN hoses are labeled with their size, such as -6 AN or -10 AN.
Length: 3 feet vs. 20 feet
The right length depends on how much of the fuel line you need to protect. A 3-foot section is handy for a single short run near a heat source, like an exhaust manifold or turbo. A 20-foot roll gives you more flexibility for longer routes, multiple lines, or future projects.
Measure the actual hose path before buying. It is better to have a little extra than to come up short, but buying a 20-foot roll when you only need a few feet means spending more than necessary.
Decision rules for choosing sleeving
- Identify your hose size: Check the AN size of your fuel hose. The sleeving must match that size, so a -6 AN hose needs -6 AN sleeving, and a -10 AN hose needs -10 AN sleeving. If you are unsure, measure the outer diameter of the hose and compare it to AN sizing charts.
- Measure the length you need: Run a tape measure along the hose path you want to protect. Add a few extra inches for cutting and adjustments. If the total is under 3 feet, a 3-foot section may be enough; if it is longer or you want to protect multiple lines, choose a 20-foot roll. Always buy a little more than your measurement to avoid coming up short.
- Consider future needs: If you plan to reroute lines or add more fuel system components later, a 20-foot roll gives you spare material. For a one-off repair on a single short section, the 3-foot option is more economical.
Product facts
- 6AN 3Ft. of Reflective Heat Protection Sleeving for -6 AN Hose: DeatschWerks 6AN 3Ft. Reflective Heat Protection Sleeving fits -6 AN hose and provides 3 feet of reflective sleeving. This is a good choice for a short, targeted section of -6 AN fuel line that runs near a heat source.
6AN 3Ft. of Reflective Heat Protection Sleeving for -6 AN Hose - 6AN 20Ft. of Reflective Heat Protection Sleeving: DeatschWerks 6AN 20Ft. Reflective Heat Protection Sleeving fits -6 AN hose and provides 20 feet of reflective sleeving. This roll covers longer -6 AN lines or multiple sections, so you can protect more of the fuel system in one purchase.
6AN 20Ft. of Reflective Heat Protection Sleeving
Who should choose which size
Best for
- Short -6 AN fuel line runs near heat sources, such as a 3-foot section near the exhaust
- Longer -6 AN fuel line routes or multiple lines needing 20 feet of protection
Not for
- Fuel lines larger than -6 AN, such as -10 AN, which require sleeving sized for that hose
