Russell Stainless Brake Line Kits for Classic Cars

By Core Brake Parts Tech Team — Circleville, OH warehouse

Russell Street Legal stainless braided brake line kits replace the rubber flex hoses on a classic car with factory-assembled, DOT-compliant hoses built for that exact chassis. Russell lists kits for cars like the 1965-67 Mustang, 1969-76 Camaro and 1963-82 Corvette, and each one is sold as a bolt-on set for a stock brake layout. The payoff is less hose expansion, a firmer pedal, and new hoses on a car whose original rubber may be decades old.

What a Russell Street Legal Kit Actually Is

A classic car's brake plumbing has two kinds of line. Rigid steel tubing runs along the body and frame, and short flexible hoses bridge the gap to the parts that move: the front calipers or wheel cylinders that steer and travel with the suspension, and the rear axle that moves up and down. Those flex hoses are the only rubber in the hydraulic system that sees full line pressure, and they are what a Russell kit replaces.

Russell describes its Street Legal kits as stainless steel braided hose with zinc-plated fittings, factory assembled for convenient installation, and built to meet U.S. Department of Transportation FMVSS 571.106. Inside the braid is a PTFE inner liner that carries the fluid; the stainless braid wraps it and resists swelling under pressure. Russell's own point is that replacing the OE rubber hose reduces brake hose expansion for more consistent braking.

Russell also states that all of its brake hose kits are for stock applications unless noted otherwise. That line matters on classics, because many of them no longer have stock brakes. More on that below.

Classic Applications Russell Builds Kits For

These are some of the older-vehicle kits on Russell's current Street Legal list. The line count tells you how many hoses are in the box, and the brake description tells you which setup the kit was built around.

The brake layout column is the part people skip. The 1965-67 Mustang kit is listed for front disc cars, so a car still on front drums needs a different setup. The Camaro list separates 1967-68 drum cars from 1969-76 disc cars and calls out the 1969 Z28 as an exception. Before you order, look at what is actually on your car today, not what the build sheet says it left the factory with.

We carry Russell kits for later performance cars that are now collector territory too, including the Russell 692010 brake line kit for 1984-87 Corvettes, the 692020 kit for 1988-92 Corvettes including the ZR-1, the 692120 kit for the 1994-96 Impala SS and Roadmaster, and the Street Legal 685600 kit for the 1986-92 Mazda RX-7. Browse the full range in our brake lines collection and brake hoses collection.

Why DOT Compliance Matters on a Street Car

Federal Motor Vehicle Safety Standard 106 exists, in its own words, to reduce deaths and injuries from brake system failure caused by hose or hose assembly rupture. It covers passenger cars and the brake hoses and hose assemblies sold for them. A few of its requirements explain why a factory-built kit is different from a hose you put together in the garage:

• Crimped or swaged ends. A hydraulic brake hose assembly must have permanently attached end fittings, attached by crimping or swaging the fitting around the hose.
• Burst strength. For hose 1/8 inch or smaller in diameter, the assembly must hold 4,000 psi for 2 minutes and must not rupture at less than 7,000 psi.
• Limited expansion. The same size hose may expand no more than 0.66 cc per foot at 1,000 psi, 0.79 cc per foot at 1,500 psi and 1.21 cc per foot at 2,900 psi. Low expansion is what a firm pedal depends on.
• Durability tests. The standard also includes a 35-hour whip (flexing) test, pull tests of 325 and 370 pounds, a 70-hour brake fluid compatibility test at 248 degrees F, and a high-temperature impulse test of 150 cycles at 295 degrees F.
• Labeling. Assemblies carry a band with the DOT symbol, which under the standard is a certification by the hose assembler that the assembly meets all applicable safety standards.

Russell also sells braided hose and fittings you assemble yourself. Its instructions for Pro-System fittings have you cut the hose, spread the braid, slip a brass ferrule over the PTFE liner and draw the fitting up with a tapered nut. That is a compression fitting, not a crimp, so it does not meet the crimped-or-swaged requirement above. The same thinking applies to competition hoses such as the Russell 656020 competition braided hose, which is sold for off-road race use. For a car that sees public roads, use a Street Legal kit.

Signs Your Classic Needs New Brake Hoses

Rubber flex hoses age whether the car is driven or stored. Heat, ozone and flexing break the outer cover down, and the inside of the hose can deteriorate where you cannot see it. Look for these symptoms:

• Soft or sinking pedal that firms up with pumping, after you have bled the system and ruled out air and a leaking master cylinder.
• Cracks, checking or bulges on the hose cover, especially near the fitting ends. Have a helper press the pedal while you watch the hose; a bulge under pressure means replace it now.
• Pull to one side or a wheel that stays hot after a drive. A hose that has collapsed internally can trap pressure at one caliper or wheel cylinder.
• Wetness at the hose ends, the frame bracket or the axle junction.
• Unknown history. If you cannot say when the hoses were last replaced on a car this old, treat them as due.

Picking the Right Kit for a Modified Car

Because Russell kits are built for stock applications unless noted, a classic with a brake swap needs careful matching. A few common situations:

• Drum-to-disc front conversion. A kit built for original drum front brakes will not have the right caliper end. Choose a kit that lists a disc layout, or a swap-specific kit like Russell's 692330, which is listed for 1967-68 GM A-body cars running 1969-72 front discs. We carry the Russell 692330 A-body front disc swap kit; confirm your calipers and spindles match the swap before ordering.
• Aftermarket big-brake kits. Many come with their own hoses. If yours did not, match the hose end fittings to the caliper, not the car.
• Lifted or lowered vehicles. Russell sells separate kits for lifted trucks and Jeeps because ride height changes the hose length needed. Check that any hose reaches full suspension droop and full steering lock without stretching.
• Fitting sizes. Russell's chart puts -3 AN at a 3/16-inch metal tube size with 3/8-24 threads. If you are mixing parts from different sources, confirm threads instead of forcing a fitting.

Installation and What to Replace at the Same Time

Replacing the flex hoses is a bolt-on job for a home mechanic with flare-nut wrenches, a bleeding setup and patience with old hardware. On a classic, the hard part is usually freeing the steel line nut from a decades-old hose without rounding it or twisting the line. Soak the fittings with penetrant, use a proper flare-nut wrench, and hold the hose end while you turn the tube nut.

• New sealing washers. Use new washers at banjo and caliper connections. Never reuse old ones.
• Hard lines. If a steel line twists or crumbles when you loosen it, replace that section.
• Fluid. Flush and bleed the whole system with the fluid type specified for your car, and never mix silicone and glycol fluids. See our brake parts for supplies.
• Wheel cylinders, calipers and hardware. If the car sat for years, inspect these while the system is open. Our brake calipers and brake hardware kits cover the rest of the job.
• Routing check. With the wheels on the ground, turn the steering lock to lock and make sure no hose rubs a tire, spring or suspension arm. Torque every fitting to the value in the factory service manual.

Bleed until the fluid runs clear and bubble-free at every wheel, then road test at low speed before trusting the car in traffic.

Frequently Asked Questions

Are Russell stainless brake lines street legal?

Russell's Street Legal brake hose kits are built to meet FMVSS 571.106, the federal brake hose standard. Its build-it-yourself hose with compression fittings and its competition hoses are different products and are not the right choice for a street car.

Will braided lines fix a spongy pedal on my classic?

They reduce hose expansion, which firms the pedal if the hoses are part of the problem. They will not fix air in the lines, a worn master cylinder, out-of-adjustment rear drums or leaking wheel cylinders, so diagnose those first.

Do Russell kits replace the steel brake lines too?

No. The kits replace the flexible hoses at the wheels and axle. The rigid steel tubing on the body and frame is a separate job.

How many lines does my car need?

It depends on the car and its brake layout. Russell lists 3-line kits for many front disc, rear drum classics, a 4-line kit for the 1963-82 Corvette, and a 2-line front-only kit for the 1968-70 Mustang. Match the kit to what is on your car.

Can I use a stock-application kit after a disc brake swap?

Only if the kit lists the brake layout you now have. Russell kits are for stock applications unless noted, so a drum-to-disc conversion usually calls for a disc-listed kit or a swap-specific kit.

Sources

1. Russell Performance - Street Legal Brake Hose Kits - kit construction, FMVSS 571.106 compliance, stock-application note, classic vehicle kit list and line counts
2. Russell Performance - 1969-76 Camaro kit 692080 - Camaro kit application and line count
3. Russell Performance - 1965-67 Mustang kit 693050 - Mustang front disc, rear drum kit application
4. Russell Performance - Technical Resources - AN size and thread chart, PTFE liner, compression-style Pro-System fitting assembly
5. 49 CFR 571.106, Standard No. 106 Brake Hoses (Cornell LII) - purpose, crimp or swage requirement, expansion, burst, whip, tensile, fluid compatibility and impulse test values, DOT labeling