KP540 complete front axles pair our proprietary high-clearance housings with 40 spline, 1550 U joint compatible KP540 wheel ends for serious steering strength and serviceability. Each assembly uses ECGS inner Cs, knuckles, spindles, and hubs and is built to be the strongest and most serviceable 1550 joint axle in the aftermarket today. Select the configuration that fits your platform and tire size, then choose steering and brake options to match how you wheel.
22 products in KP540 Complete Axles

ECGS D60HP KP540 - 40 spline - JK
SKU: BO-D60FKP540-HSA00
$7,200.00
$14,350.00

ECGS D60HP KP540 - 40 spline - JL
SKU: LH-KP540
$7,200.00
$14,350.00

ECGS D60HP KP540 - 40 spline - JT
SKU: LH-KP540
$7,200.00
$14,350.00

ECGS D60HP KP540 - 40 spline - TJ/XJ/MJ/ZJ
$7,500.00
$14,950.00

ECGS D60HP KP540 - 40 spline
SKU: BO-D60FKP540-HSA00
$6,500.00
$12,950.00

ECGS D80 Front KP540 - 40 spline
SKU: BO-D80-RG
$6,800.00
$13,550.00

ECGS 14 BOLT KP540 - STEERING AXLE
$6,800.00
$13,550.00

ECGS 14 BOLT KP540 - REAR STEERING AXLE
SKU: ARB:RD234
$6,800.00
$13,550.00

ECGS 14 BOLT KP540 - FULL SHAVE STEERING AXLE
SKU: BO-GM14FKP540-AX72S
$7,000.00
$13,950.00

ECGS 14 BOLT KP540 - FULL SHAVE REAR STEERING AXLE
SKU: BO-D60FKP540-HSA00
$7,000.00
$13,950.00

ECGS 14 Bolt Rear Axle - 40 Spline - JK
SKU: WH-FF40RA
$4,950.00
$9,850.00

ECGS 14 Bolt Rear Axle - 40 Spline Shaved - JK
SKU: ARB:RD234
$5,650.00
$11,250.00

ECGS 14 Bolt Rear Axle - 40 Spline - JL
SKU: DOM-4.0-.375
$4,950.00
$9,850.00

ECGS D80 Rear Axle Assembly - 40 Spline - TJ
$5,375.00
$10,700.00

ECGS D80 Rear Axle Assembly - 40 Spline - JK
$5,455.00
$10,860.00

ECGS D80 Rear Axle Assembly - 40 Spline - JT
SKU: BO-D80-RG
$5,375.00
$10,700.00

ECGS D80 Rear Axle Assembly - 40 Spline - JL
$5,300.00
$10,550.00

ECGS Comp 9" - Full Float 40 Spline
$3,950.00
$9,470.00

Dana 60 Rear Axle Assembly Full Float - 40 Spline
$4,061.00
$8,072.00

ECGS D80 Rear Axle Assembly - 40 Spline
SKU: BO-D80FF40-AX70
$4,680.00
$9,310.00
Build once and drive with confidence. KP540 complete axles start with our high-clearance center section and add a full KP540 wheel end package that is designed around a 40 spline interface and the large 1550 U joint window. The result is a front axle that steers precisely, handles impact loads, and can be serviced with readily available parts. Inner Cs, knuckles, spindles, and hubs are ECGS components engineered to work together as a system.
What defines a KP540 complete axle
• High-clearance ECGS housing matched to KP540 wheel ends for rock and obstacle clearance.
• 40 spline, 1550 U joint compatible inner Cs and knuckles for large joint strength and steering durability.
• Serviceable spindle and hub architecture aimed at long life and straightforward maintenance.
• Configurations available across platforms including D60 high-pinion front and D80 front variants.
Why choose KP540 over a typical build
• Strength from the 40 spline interface and large 1550 joint window with ECGS-engineered Cs, knuckles, spindles, and hubs.
• Proven serviceability that customers value for hard trail use and competition style driving. Product pages note this as our strongest and most serviceable 1550 joint axle.
• Options to match steering and brakes to rig weight, tire size, and use case using the KP540 ecosystem of parts and kits.
Shopping notes
• Look for platform specific listings such as D60HP KP540 for TJ, XJ, MJ, ZJ as well as universal D60HP KP540 and D80 front selections. Each product page details specs, pricing, and lead times.
• Pair with KP540 builder kits and parts if you plan future steering arm or brake changes. The system is designed to scale with your rig.
Typical use cases
• Weekend crawler on 37 to 40 inch tires that needs reliable steering and straightforward maintenance
• Heavy trail rig or overland build where brake heat capacity and serviceability matter
• Competition inspired buggy that benefits from the 40 spline, 1550 joint window and robust KP540 knuckle design
FAQs
What makes a KP540 complete axle different
It combines our high-clearance center section with a full KP540 wheel end package that uses ECGS inner Cs, knuckles, spindles, and hubs. The assembly is described on product pages as our strongest and most serviceable 1550 joint axle.
East Coast Gear Supply
Which models are available
Listings include D60 high-pinion KP540 complete axles and D80 front KP540 variants, with some Jeep platform specific versions. Check individual product pages for details.
Can I service the bearings and hubs
Yes. KP540 uses a serviceable spindle and hub layout designed for long life and easy maintenance.