How to Repair a Brake Line: Leaks, Rust-Through, and Broken Lines Fixed Right
You can repair a damaged brake line by cutting out the bad section and splicing in new tubing with flared unions, but only if the damage is isolated and the ...
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The best non rusting brake lines and fittings on the market that aren’t over priced!
I recently purchased brake lines for the 4th time from 4Lifetime Lines, and I couldn’t be more impressed with the quality and service. Their products are top-notch—durable, reliable, and easy to install.
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Our most-bought combinations — together at 5% off.
4LifetimeLines
Complete Cu-Ni Brake JobWhat's included
- 3/16 in. x 25 ft Copper-Nickel Brake Line Kit
- 3/16 in. Fitting Assortment — 24 SKUs
- 3/16 in. Handheld Line Straightener
$143.23$150.77
4LifetimeLines
Stainless Brake Line JobWhat's included
- 3/16 in. x 25 ft Stainless Steel Brake Line Kit
- Professional Flare Tool Kit — SAE double & ISO bubble
$99.73$104.98
4LifetimeLines
Flare Tool + Extra DiesWhat's included
- Professional Flare Tool Kit — SAE double & ISO bubble
- Flaring Dies — 3/16, 1/4, 5/16, 3/8 in.
$143.14$150.67
4LifetimeLines
Compression Union 3-PackWhat's included
- 1/4 in. High-Pressure Compression Union
- 5/16 in. High-Pressure Compression Union
- 3/8 in. High-Pressure Compression Union
$13.07$13.76
4LifetimeLines
Turret Flaring SetupWhat's included
- Professional Turret Flaring Tool — quick-change turret
- 3/16 in. Handheld Line Straightener
$229.92$242.02
4LifetimeLines
5/16 Nylon Fuel Line SetWhat's included
- 5/16 in. x 25 ft Nylon Fuel Line Coil
- 5/16 in. Steel-to-Nylon Push-On Connectors (2 ct)
$24.68$25.98
4LifetimeLines
PVF Steel Line DuoWhat's included
- 5/16 in. x 25 ft PVF-Coated Steel Coil
- 3/8 in. x 25 ft PVF-Coated Steel Coil
$31.33$32.98
4LifetimeLines
Stainless Tube Nut SetWhat's included
- 3/16 in. (7/16-24 Inverted) Stainless Tube Nuts (10 ct)
- 3/16 in. (3/8-24 Inverted) Stainless Tube Nuts (10 ct)
$19.93$20.98
4LifetimeLines
Cu-Ni Coil TrioWhat's included
- 3/16 in. x 25 ft Copper-Nickel Coil
- 1/4 in. x 25 ft Copper-Nickel Coil
- 5/16 in. x 25 ft Copper-Nickel Coil
$94.02$98.97
4LifetimeLines
Brake Line + Rock GuardWhat's included
- 3/16 in. x 25 ft Copper-Nickel Brake Line Kit
- 3/16 in. x 16 ft Stainless Steel Gravel & Rock Guard
$42.73$44.98
4LifetimeLines
Master Flaring SetupWhat's included
- Master Flaring Tool Set — SAE double & ISO bubble
- 3/16 in. Handheld Brake & Fuel Line Straightener
$102.63$108.04
4LifetimeLines
Nylon Fuel Line KitWhat's included
- 3/8 in. x 25 ft Nylon Fuel Line Coil
- 5/16 in. x 25 ft Nylon Fuel Line Coil
- 3/8 in. Steel-to-Nylon Push-On Connectors (2 ct)
$43.67$45.97
4LifetimeLines
Fitting Size Gauge SetWhat's included
- SAE Brake Line Fitting Size Gauge
- Metric Brake Line Fitting Size Gauge
$24.28$25.56
4LifetimeLines
Pro Brake Line SetupWhat's included
- 3/16 in. x 25 ft Copper-Nickel Brake Line Kit
- Pro Flare Tool Kit — SAE double & ISO bubble
- 3/16 in. Fitting Assortment — 24 SKUs
$156.53$164.77
4LifetimeLines
Brake Line + Matching FittingsWhat's included
- 3/16 in. x 25 ft Copper-Nickel Brake Line Coil
- 3/16 in. Metric 10x1.0 Steel Tube Nuts (10 ct)
- 3/16 in. Compression Union Fitting
$35.12$36.97
4LifetimeLines
Dual-Size Line SetWhat's included
- 3/16 in. + 1/4 in. Copper-Nickel Line & Fitting Set (2-pack)
- 3/16 in. Brake Line Tubing Clamps (10 ct)
$63.07$66.39
4LifetimeLines
The Brake Line JobWhat's included
- 3/16 in. x 25 ft Copper-Nickel Brake Line Kit
- Pro Flare Tool Kit — SAE double & ISO bubble
$89.28$93.98
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Brake Lines, Tubing & Kits
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FIND THE RIGHT PARTS
vehicle specific
Buying Guide
The Knowledge Garage
Guides from the people who make the parts
Start with a guide
Brake Line Replacement
When to replace, tools to use, routing, and bleeding — the full job, step by step.
Read the guide →Brake Line Flaring
Double vs. bubble flares, choosing a flaring tool, and technique for leak-free joints.
Read the guide →Fittings & Sizing
Tube nuts, unions, adapters — and how to pick the right line size the first time.
Read the guide →Materials & Corrosion
Copper-nickel vs. coated steel, why lines rust, and how to stop it for good.
Read the guide →Latest from the garage
Open-End vs. Box-End vs. Ratcheting Wrenches: Which to Grab
Open-end, box-end, ratcheting, line wrench, or crowfoot? What each wrench style is actually for — and which one to reach for on line fittings.
Double Flare vs. Bubble Flare: How to Flare a Brake Line the Right Way
Double flare or bubble flare? Learn which brake line flare your car needs, how to make a leak-free flare step by step, and the tools that get it right.
Dielectric Grease: What It Is, When to Use It (and When Not To)
Dielectric grease is a silicone insulator, not a conductor. Here's where it belongs on your vehicle, where it doesn't, and how to apply it correctly.