Brake Lines
Copper Nickel Brake Lines & Kits
Rust-proof lines that bend by hand and outlast the vehicle.
If you're only going to do this job once, do it in copper-nickel. Our CuNi 90/10 alloy is the premium choice for brake line replacement -- it never rusts, bends by hand, and flares cleanly, which is why professional shops and experienced DIYers won't go back to coated steel.
Complete the job — you'll also want
Why copper-nickel?
Unlike plain or coated steel, copper-nickel is completely corrosion-proof, so it's ideal for daily drivers in the Rust Belt, restorations, and anything that sees road salt. It's soft enough to bend and route by hand without a bender, and it forms both SAE double and DIN bubble flares. It meets SAE J1047 / ISO 4038 and is street-legal in all 50 states, backed by our lifetime warranty.
What size do I need?
Most brake circuits use 3/16"; some rear and heavy-truck runs use 1/4". Match the tube nut on your existing line -- see our guide on what size brake line you need.
Compare with stainless steel and PVF-coated steel, add fittings and a flaring tool, or browse all brake lines.