Truck Accessories Buyer's Guide
Built for the Road You Actually Drive: The Bilstein Shock Absorber Guide
B6 4600 for stock trucks. B8 5100 for lifted ones. Here's how to know which series belongs under your truck — and why it matters.
Most truck owners shopping for shocks make the same mistake: they search by vehicle and buy whatever fits — without realizing Bilstein builds two fundamentally different products for two fundamentally different trucks. The B6 4600 Series is engineered for trucks at factory ride height, delivering a step up from worn OEM shocks without changing how the truck sits or handles. The B8 5100 Series is built for trucks that have been lifted or leveled, with adjustable ride height collars designed specifically for that scenario. Running 5100s on a stock truck doesn't make it better — it makes it ride wrong. Knowing which series belongs under your truck is the difference between a genuinely improved ride and one that fights itself on every bump.
What makes a monotube shock different?
All Bilstein truck shocks use a monotube design, which separates the oil and gas into a single tube rather than stacking them in two. This prevents the aeration and fade that happens in twin-tube shocks under repeated hard use — the kind of use a work truck sees every day. A monotube shock also runs cooler and responds more consistently, which is why they're spec'd on everything from daily drivers to off-road builds. The 46mm bore diameter found across the Bilstein lineup is larger than most OE shocks, delivering more fluid volume and a more controlled damping stroke.
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Vehicle-Specific Fit Every Bilstein shock is engineered for a specific make, model, and year range — not a universal fit. No shimming, no adapters, no guesswork at install. |
No Fade Under Load Monotube gas pressure design keeps oil and gas separated, so there's no aeration and no performance drop on back-to-back hits — critical for towing and hauling. |
46mm Bore Advantage The larger bore diameter means more fluid volume per stroke, which translates to more consistent damping force — especially noticeable at highway speeds and under load. |
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Direct Bolt-On Install B6 4600 shocks mount directly to OE brackets with no modifications. The B8 5100 uses the same mounting points, adding a snap-ring collar for height adjustment. |
Off-Road Durability Built to Bilstein's German engineering standards, these shocks are spec'd on military and emergency vehicles worldwide. They handle rough roads, worksites, and trail driving. |
Protects Suspension Geometry Worn OE shocks let the suspension cycle further than it should, accelerating wear on control arm bushings, ball joints, and tie rod ends. Bilstein shocks hold the geometry where it belongs. |
B6 4600 Series — The Stock-Height Upgrade
Direct-fit replacement shocks for trucks running at factory ride height. Silverado 1500, Sierra 2500 HD, and more.
Who the B6 4600 is for
If your truck is stock height — no leveling kit, no lift — the B6 4600 is the correct Bilstein for you. These shocks are engineered as a performance upgrade over your factory shocks while maintaining the OE suspension geometry your truck was designed around. They install with zero modifications, use the same mounting hardware as the OEM unit, and immediately improve road feel, body control under load, and braking stability. Think of them as your factory shocks, done right.
Bilstein
B6 4600 Series — Front Silverado 1500 Front Monotube Shock (1999–2013) Replaces the worn OE front shock on 1999–2013 Chevrolet Silverado 1500 and GMC Sierra 1500/2500/3500 at stock ride height. Direct bolt-on with the 46mm monotube design that eliminates the fade and wallow of factory damping. $118.99 Shop Now |
Bilstein
B6 4600 Series — Rear Silverado 1500 LT Rear Monotube Shock (2007–2013) Rear shock fitment for 2007–2013 Chevrolet Silverado 1500 LT at factory ride height. Restores the controlled rear-end damping that keeps your bed from bouncing empty and squatting loaded — critical if you're running the truck hard. $118.99 Shop Now |
Bilstein
B6 4600 Series — Rear Sierra 2500 HD SLE Rear Monotube Shock (2001–2010) Built for 2001–2010 GMC Sierra 2500 HD SLE at stock height. Heavy-duty trucks put more demand on rear shocks than any other component — this is the upgrade that keeps a 2500 HD tracking flat under a full payload or gooseneck load. $118.99 Shop Now |
B8 5100 Series — Lifted, Leveled & Load-Ready
Adjustable ride-height monotube shocks for trucks with a leveling kit, lift kit, or front-end coilover suspension. Silverado, Sierra, and heavy-duty applications.
What the snap-ring collar actually does
The defining feature of the B8 5100 is the snap-ring collar on the front shock body — it lets you set ride height at 0, 0.5, 1, 1.5, or 2 inches of lift before you ever touch the truck. For trucks using a leveling kit, this means you can match the shock travel to your actual lift rather than running a stock shock through a range it wasn't built for. For trucks with coilover-style front suspension (most 2007+ GM half-tons), the 5100 replaces the entire front strut assembly and handles the height adjustment in one install. It's a meaningful difference — not a marketing one.
Bilstein
B8 5100 Series — Front / Adjustable Sierra 1500 XFE Front Ride-Height Adjustable Shock (2007–2013) Designed for 2007–2013 GMC Sierra 1500 XFE with OE coilover front suspension. Snap-ring collar adjusts from 0 to 2 inches of lift — the right choice when you're leveling the front end and need a shock that's actually built for that position. $194.99 Shop Now |
Bilstein
B8 5100 Series — Rear Silverado 3500 HD WT Rear Monotube Shock (2007–2010) Rear fitment for 2007–2010 Chevrolet Silverado 3500 HD WT. The 5100's stiffer valving is matched to trucks that spend real time under load — it handles the suspension travel that comes with a heavy lift and keeps the rear end planted when it matters. $149.99 Shop Now |
Bilstein
B8 5100 Series — Rear Silverado 2500 HD LT Rear Monotube Shock (2011–2025) Covers 2011–2025 Chevrolet Silverado 2500 HD LT — a wide fitment range that includes the current generation. If you're running a lifted or leveled 2500 HD and need a rear shock that keeps up with the front, this is the one. $149.99 Shop Now |
Colorado & Mid-Size Trucks
The same Bilstein monotube engineering, dialed in for the Colorado and Canyon platform — front and rear.
Bilstein
B6 4600 Series — Rear Colorado / Canyon Rear Monotube Shock (2004–2012) Fits 2004–2012 Chevrolet Colorado and GMC Canyon at stock height. Mid-size trucks take a beating in the rear suspension — this direct-fit B6 replaces the OE shock with a monotube unit built for actual use rather than minimal cost. $118.99 Shop Now |
Bilstein
B6 4600 Series — Front Colorado 4WD Front Monotube Shock (2015–2022) Front fitment for 2015–2022 Chevrolet Colorado 4WD at stock height. Unlike the RWD variant, the 4WD Colorado front suspension takes a much heavier hit off-road — this shock is valved specifically for that platform and those loads. $140.99 Shop Now |
Bilstein
B1 Hardware — Reservoir Clamps B1 Reservoir Clamps — Black Anodized (1994–2010 Ram 1500) Black anodized aluminum reservoir clamps for 1994–2010 Dodge Ram 1500, with broad additional fitment across Silverado, Avalanche, and Suburban platforms. Keeps the remote reservoir secured and properly oriented — the kind of hardware detail that matters when the suspension is working hard. $74.99 Shop Now |
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