Copper-nickel brake lines & fittings

Brake lines that never rust.

Copper-nickel lines bend by hand, flare clean, and won't rot out like factory steel. Backed by a lifetime warranty.

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4.8 from nearly 4,000 Amazon seller ratings

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The last lines you'll buyLifetime warranty on every line
Guaranteed to fitThe right parts for your ride
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Stainless Brake Line Job — included item

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$104.98Save $5.25

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$150.67Save $7.53

5/16 Nylon Fuel Line Set — included item

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$25.98Save $1.30

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$20.98Save $1.05

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$45.97Save $2.30

4LifetimeLines Fitting Size Gauge SetWhat's included

SAE Brake Line Fitting Size Gauge
Metric Brake Line Fitting Size Gauge

$24.28$25.56Save $1.28

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$66.39Save $3.32

Trusted by thousands of DIYers & pros

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4.8 out of 5

From nearly 4,000 Amazon seller ratings

5★ 90%
4★ 6%
3★ 1%
2★ 1%
1★ 2%

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Google Customer Reviews

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.

Braxton

Quality brake line

I had to run new brake lines on my 2006 Subaru Legacy. This line has been very easy to work with, very flexible and easy to flare.

Igor K.

Easy to form, flares easy

Good quality. Easy to form and bends with hands or bender. Forms flares easy without difficulty.

Douglas P.

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Pick the right line

Why copper-nickel?

Factory steel lines rust from the outside in. Here's how the replacements compare, so you only do this job once.

Brake line materials compared: copper-nickel, PVF-coated steel, stainless steel and factory bare steel
Feature	Our pickCopper-nickel	PVF-coated steel	Stainless steel	Factory bare steel
Rust	Won't rust	Resists it until the coating is nicked	Won't rust	Rusts — why you're replacing it
Bending	By hand	Bender recommended	Bender required, springs back	Bender recommended
Flaring	Easy with a standard tool	Strip the coating first	Hard — pro or hydraulic tool	Standard tool
Best for	Most DIY and shop repairs	OEM look on a budget	Show builds, max strength	—
Shop	Shop copper-nickel	Shop PVF	Shop stainless