3PCS Front and Rear Brake Lines 89340S 89335S - Extended Stainless

In this review the 3PCS Front and Rear Brake Lines 89340S 89335S are evaluated for lifted Chevrolet and GMC C/K trucks and SUVs; the bottom line is these are a practical replacement for owners running 4' to 6' lift kits who need longer, durable brake lines. The reviewer found the greatest selling point is the braided stainless steel construction and internal design that resists expansion, giving firmer pedal feel and reliable braking response while protecting lines from off-road debris and mud.

Key Features

• Vehicle Compatibility: Fits a broad range of Chevrolet and GMC C/K series trucks and SUVs from 1971 to 1991, covering common pickup and Suburban models for lifted applications.
• Extended Lengths: Front line length of 24 in and rear length of 18.3 in give the extra reach needed for 4 in to 6 in lift setups without stressing factory fittings.
• Durable Exterior: Braided stainless steel outer sleeve protects the hose from rocks, mud, and off-road abrasion to extend service life in harsh conditions.
• Stable Hydraulic Core: The internal construction resists expansion under pressure, producing firmer and more responsive braking performance compared with expanded rubber lines.
• Included Hardware: Copper washers and stainless gaskets supplied with suitable inner diameters to fit the standard bolt fittings on both ends for straightforward installation.
• OE Replacement: Sold as a direct replacement for OE part numbers 89340S and 89335S so it integrates with existing brake plumbing.

Who It's For

This set is aimed at owners of 1971-1987 Chevrolet and GMC C/K pickups and 1971-1991 Suburban and K5 Blazer owners who have added 4 in to 6 in of lift and need extended brake lines that maintain pedal feel. It is also well suited for off-road users who want the abrasion resistance of braided stainless lines to protect against trail damage.

Drivers of earlier or later model vehicles outside the listed years, or anyone using a lift larger than 6 in, should verify fitment or look for custom-length lines; note specifically this set does not fit the 1984 K5 Blazer according to the product notes.

Pros & Cons

Pros

• Improved pedal feel from the internal non-expanding core delivers firmer braking response under load.
• Braided stainless exterior resists abrasion from rocks and mud for better longevity off-road.
• Direct OE replacement for 89340S/89335S with included washers and gaskets simplifies installation.
• Lengths provided suit common 4 in to 6 in lift conversions without additional adapters.

Cons

• Not compatible with every K5 Blazer year; specifically stated to not fit 1984 K5 Blazer, so fitment must be checked.
• Hardware and lengths are fixed; those needing custom routing or larger lifts may require alternate solutions.

Specifications

Brand	Racewill (listed)
OE Replace	89340S / 89335S
Front Brake Line Length	24 in
Rear Brake Line Length	18.3 in
Copper Washer I.D.	0.4 in
Stainless Gasket I.D.	0.62 in
Compatible Vehicles	Chevy/GMC C/K pickup, Suburban, K5 Blazer, Jimmy (1971-1991 with exceptions)

Our Verdict

The 3PCS Front and Rear Brake Lines 89340S 89335S are a sensible, value-minded upgrade for owners of 1971-1991 Chevy and GMC trucks and SUVs running moderate lifts. They combine braided stainless protection with an internal core that preserves pedal firmness, and include the washers needed for a direct replacement. Verify year and model fitment before purchase, but for compatible vehicles this set delivers durable performance and easier installation for lifted brake plumbing.

Frequently Asked Questions

Will these lines work on a 6 in lift?
Yes; customers report successful use on 6 in lift installations and the front 24 in and rear 18.3 in lengths accommodate common 4 in to 6 in lifts.

Do the lines include washers and gaskets?
Yes; copper washers (0.4 in I.D.) and stainless gaskets (0.62 in I.D.) are provided to fit the bolt fittings on both ends.

Are these compatible with all K5 Blazer years?
No; the product notes explicitly state they do not fit the 1984 K5 Blazer, so confirm year-specific fitment before ordering.