The Bilstein B6 4600 front shock (MPN 24-010047) is a 46mm monotube damper built as a direct-fit replacement for the factory front shock on stock-height Toyota Land Cruiser Base models from 1985 to 1990. The manufacturer describes the B6 4600 line as a direct-fit upgrade for stock-height light trucks and SUVs, with a velocity-sensitive digressive piston that responds to changing road input. Its single-tube, gas-pressure layout is meant to resist the fade that builds up in factory twin-tube units during repeated hard use. Owners on user forums say it gives tighter body control over worn OE shocks, especially with a load or on rough pavement.
Because the shock reuses the factory springs and mounting hardware, the swap keeps the stock ride height while improving damping. The manufacturer backs the B6 4600 with a limited lifetime warranty. For front fitment, the shock is designed around the 1985 to 1990 Land Cruiser Base layout, so buyers searching for an FJ62 front shock upgrade, a stock-height monotube replacement, or part number 24-010047 are matching the intended application. Lifted trucks are a poor fit, since the design targets stock height. Installation is a job for a suspension shop with a hoist and an alignment rack, though an experienced home mechanic with a spring compressor can complete it.
The manufacturer's fitment for this part number covers 1985 to 1990 Land Cruiser Base models. Owners on user forums report that the manufacturer lists a different front part number for 1984 trucks, so confirm your model year and part number before ordering.
The manufacturer designs the B6 4600 for stock-height vehicles. Owners on user forums note that lifted trucks generally need lift-specific shocks with more travel.
The manufacturer advises installing shock absorbers as a set when replacing other brands, so replacing both fronts together is the recommended approach. Owners on user forums also say matched damping front to rear makes the ride more predictable.
The manufacturer's mounting instructions call for a chassis hoist, a qualified suspension technician, and a caster and camber check after installation. You will need a spring compressor to move the factory spring onto the new shock, plus a breaker bar and sockets for the stud and nut. Owners on user forums report that the top stud can spin inside the mount, so hold it with a wrench or vise-grips while you tighten the nut. Original top nuts often seize, so penetrating oil and patience help. Plan on a front-end alignment afterward.
