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Q:   Can I use the stock brake lines with Wilwood kits and what is the benefit of stainless steel brake lines?

A:   Q:Yes, but they require 1/8” - 27 NPT adapters to fit the calipers. We recommend use of high quality #3 or #4 braided stainless steel flex lines as replacements to the stock rubber lines for their added strength, resistance to abrasion, and reduced expansion under pressure. When replacing drum brakes on the rear of a vehicle equipped with a solid rear axle, it is advisable to use a solid hard line across the rear axle. A 3/16” solid line will use 3/8-24 flare nuts to make a connection, and can be connected to a Wilwood caliper by installing 1/8-27 NPT to 3/8-24 IF adapters into the calipers.

Wilwood Stainless steel lines are designed as direct replacement parts for OE lines. The replacement lines typically follow the same routing as the stock lines. While the flexible brake line will accept slight modifications to the intended vehicle, any excessive lowering or lifting of the vehicle may make the lines unsuitable for use on that particular application. Also, some lines may include provisions for routing attachments on the stock suspension. If an aftermarket suspension is on the vehicle, the brake line mounting points may differ from the OE suspension. If alternate routing or modifications are required, it is the sole responsibility of the installer to assure that the lines are not binding or touching any part of the suspension or drive train nor are they being stretched beyond their limit. Inspect the line routing through the entire range of suspension travel, both up and down and left-to-right. If there is any question as to whether or not the install is correct, do not drive the vehicle until there is absolute assurance the lines are safely routed. If you have any questions, please contact a Wilwood Technician at 805-388-1188 or email Sales/Tech Support.

Q:   What size brake lines should I use?

A:  Use 3/16” steel line wherever possible during new construction. Use flex lines only where necessary.

Wilwood Engineering, Inc
4700 Calle Bolero
Camarillo, CA 93012
Phone: (805) 388-1188
Fax: (805) 388-4938

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