4LIFETIMELINES 1/4" x 25' Stainless Steel Brake Line Kit – 316L Marine-Grade Tubing, 16 Inverted-Flare SAE Fittings

4LIFETIMELINES 1/4" x 25' stainless brake line kit supplies a full, ready-to-install coil of 316L marine-grade tubing plus 16 inverted-flare SAE fittings for long-lasting, rust-resistant brake lines.

This kit bundles a 25-foot coil of 1/4" outer diameter, 0.028" wall 316L stainless steel tubing with a comprehensive assortment of inverted flare fittings so you can replace multiple brake runs without hunting parts. The marine-grade 316L alloy resists corrosion and is specified for environments where salt, moisture, and chemicals shorten the life of ordinary steel brake lines. Built for both experienced DIYers and professional shops, the tubing bends, cuts, and flares cleanly with standard tools.

How does this kit simplify a full brake line replacement?

The package is intended as an all-in-one solution: one coil of tubing plus a set of common inverted-flare fittings sized for broad vehicle compatibility. That reduces downtime and eliminates multiple orders when you need to renew lines across an axle or full vehicle.

• Includes one 25' coil of 1/4" OD 316L stainless steel tubing.
• Comes with 16 inverted-flare SAE fittings in four thread sizes for widespread fitment.
• Sufficient length to run multiple lines or handle long chassis layouts.

Will the 316L material really outperform standard steel lines?

316L stainless is a higher-grade alloy formulated for corrosion resistance in harsh environments, including exposure to road salt and coastal air. While every application varies, 316L resists pitting and surface breakdown far longer than plain carbon steel or cheaply coated tubing.

• Marine-grade 316L resists rusting and chemical attack better than galvanized or copper-coated lines.
• Maintains structural integrity through heat cycles and moisture exposure.
• Reduces the likelihood of corrosion-related leaks and the need for repeated replacements.

What tools and techniques are needed to install and flare this tubing?

The tubing’s 0.028" wall thickness balances strength with workability so it bends smoothly and cuts cleanly using commonly available shop tools. It accepts single and inverted (double) flares, and the included SAE inverted fittings are intended for reliable, high-pressure connections when properly flared and torqued.

• Use a standard tubing bender for clean, kink-free bends.
• Cut with a tube cutter and deburr before flaring to ensure seal integrity.
• Fits standard flaring tools for single or inverted flares; tighten fittings to recommended torque.

Which vehicles and brake systems is this kit compatible with?

The kit’s 1/4" OD tubing and the supplied SAE inverted fittings cover a broad range of domestic and import passenger cars, trucks, and light-duty commercial vehicles. It’s intended for hydraulic brake lines compatible with DOT brake fluids and standard SAE flare connections.

• Universal 1/4" OD fits many factory brake line sizes used across makes and models.
• Fittings include 7/16-24, 9/16-18, and 1/2-20 inverted thread sizes for common applications.
• Engineered for DOT 3, DOT 4, and DOT 5.1 hydraulic brake fluids and SAE connection standards.

Who this kit is for: 4LIFETIMELINES’ 1/4" x 25' stainless brake line kit is aimed at mechanics, restoration enthusiasts, fleet maintenance teams, and vehicle owners in corrosive climates who want a durable, serviceable brake line solution. If you need dependable corrosion resistance, enough tubing for multiple runs, and a range of common inverted-flare fittings in one purchase, this kit is tailored to those priorities. It’s not a ready-made pre-bent line set for specific models; instead, it supplies the materials to fabricate custom brake runs to fit your chassis and routing needs.