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Hydrastar® 3K Axles, 5 Lug Integral Tandem Axle Trailer Disc Brake Kit (1/2") {E3K-T1} - Hydrastar

Hydrastar® 3K Axles, 5 Lug Integral Tandem Axle Trailer Disc Brake Kit (1/2") {E3K-T1}

SKU #E3K-T1
by Hydrastar
Save 8% Save 8%
$1,999.00
$1,999.00 - $1,999.00
$1,999.00
$1,847.00
$1,847.00 - $1,847.00
$1,847.00

Complete tandem axle disc brake conversion kit for 3K axles with 5-lug hubs. Includes the Hydrastar EOH actuator, disc brake assemblies, brake lines, and all hardware needed for a full conversion.

3K
Axle Rating
TANDEM
Axle
DISC
Brakes
DOT
Compliant
What You Get

In The Box & Sold Separately

Included
✓
(2) E303-3K1-A — Hydrastar® 3K Rated, Dacromet Coated Integral Single Axle Brake Kit (1/2 in. ) Corrosion-resistant Dacromet Coated Rotor
✓
(2) 303-E36C — 3K/6K Axle Rated Dacromet Coated Integral
✓
(2) 303-3IB — 3K Axle Rated Integral Dacromet Coated Bracket
✓
(1) 496-252 — Hydrastar® Hydraulic Tandem Axle Brake Line Kit – 25 ft., 3/16 in., 3000psi hydraulic brake pressure The Hydrastar® Brak
✓
(4) L44649 — Hydrastar® 3K Rated Outer Bearing
✓
(4) GS-171255TB — Hydrastar® 3K Rated Grease Seal
✓
(4) MAT-20-200L — Press Posi Lube Grease Gap
Sold Separately
–
DOT 3 or DOT 4 Brake Fluid
–
Tools for installation
Questions about fitment?

Feel free to reach out to us or start a live chat in the bottom right corner for assistance.

Common Questions

Before You Buy

What PSI actuator is included?+
The 1,600 PSI GEN 8 actuator is included. This is the correct pressure for both disc and drum brake applications.
Do I need anything else to complete the install?+
You will need DOT 3 brake fluid (not included). Basic hand tools and a way to mount the actuator to your trailer tongue.
What is the difference between integral and slip over?+
Integral kits replace your entire hub and rotor as one piece. Slip over kits mount the rotor over your existing hub — faster install, no hub removal needed.
2024–2026 GM Silverado, Sierra & Denali Owners

Dashboard showing “Service Trailer Brakes”? Brakes disabled?

That’s a known GM software issue. Hydrastar has the fix — the GM Diode Module (#381-7074) is a plug-and-play inline solution.

Need Help Choosing?
Our team has helped thousands of trailer owners find the right setup.
Fastest response? Use the chat bubble in the bottom-right corner ↘
or call (812) 655-4544 · Mon–Fri, 8am–4:30pm ET