Bilstein SA4 Series Shock Absorber - Polished Aluminum

 

Bilstein SA4 Series Shock Absorber is made for custom suspension builders who need a performance shock absorber that can be matched to the chassis rather than forced into a one-size setup. The polished aluminum smooth-body design gives the shock a clean, purpose-built appearance, while the available lengths and valve settings help support the ride and handling target of the build. It is a strong choice for customers working on street rod, motorsports, and specialty suspension applications where careful measurement matters.

The shock uses Bilstein monotube technology to help manage heat and maintain consistent damping as the suspension works. A 46mm piston gives the damper the control needed for custom applications, and the selected valve setting shapes how the vehicle responds to compression, rebound, and terrain changes. Customers can build around the specific motion control their project needs instead of settling for generic damping.

The SA4 uses 5/8 inch polyurethane bushing mounts for custom street rod installations that need a straightforward eye-to-eye mounting approach. That mounting style helps the shock integrate into custom chassis layouts while preserving the precision needed for a clean suspension cycle. Because compressed length, extended length, and travel vary by selected configuration, the installer should confirm measurements against the actual chassis before final setup.

The polished and finished body gives the shock a refined look that suits visible suspension areas on high-detail builds. More importantly, the construction supports repeatable movement through the suspension stroke, helping customers balance stance, ride quality, and body control. The shock is useful anywhere a custom vehicle needs compact packaging and reliable damping control.

Customers choosing a universal-style shock absorber usually have a specific target in mind: ride height, travel, wheel clearance, spring package, or the character of the vehicle over real roads. This shock gives those builders a Bilstein foundation with length and valving choices that can be matched to the project. It is best selected by measurement, mounting style, and the intended use of the vehicle.

Whether customers are upgrading for street rod builds, chassis tuning, and custom ride-quality setup, Bilstein SA4 Series Shock Absorber delivers custom-fit damping control with a polished performance look. Now Available at LEER!

 

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Features & Specifications

Product Type: Suspension shock absorber

Brand: Bilstein

Series: SA4 Series

Application: Custom street rod suspension builds

Internal Design: Monotube

Piston Diameter: 46mm

Body Design: Smooth body non-coilover

Finish: Polished aluminum

Mounting: Eye 15.9mm upper and lower mounts

Spring Seat Included: No

Collapsed Length Range: 9.25 to 11.67 in.

Extended Length Range: 11.95 to 15.16 in.

Functionality:

• Supports custom street rod suspension layouts
• Provides monotube damping for consistent control
• Uses a polished aluminum body for a clean visible finish
• Offers multiple length and valve-setting choices
• Works well where a non-coilover shock is needed
• Helps builders tune ride quality and body control by measurement
• Supports custom chassis work with eye-style polyurethane bushing mounts

 

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Available Options

The Bilstein SA4 Series Shock Absorber is available in multiple length and valving configurations:

• Short-body SA4 -- Compact configurations support tight packaging where limited suspension space is available.
• Mid-length SA4 -- Intermediate lengths help builders balance ride height, travel, and shock placement.
• Longer-travel SA4 -- Longer extended lengths support applications that need more available suspension movement.
• Fixed and custom valve choices -- Compression and rebound selections let customers match damping character to the weight and purpose of the build.

Choose a shorter configuration for compact chassis packaging, or choose a longer configuration when the build needs more available shock travel.

 

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Why Choose

This product is ideal for customers who want a polished smooth-body shock that can be selected by length and valving for custom chassis work.

• Gives builders a clean Bilstein option for street rod projects
• Supports custom ride-height and suspension travel planning
• Uses a 46mm monotube piston for controlled damping response
• Polished aluminum finish looks at home on exposed suspension builds
• Polyurethane bushing mounts help suit common custom street rod layouts
• Multiple valve choices help match the shock to vehicle weight and use
• Works well for customers who measure carefully and want a tailored result

 

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What's Included

• One SA4 Series shock absorber
• Polyurethane bushing mounts where supplied
• Selected length and valve configuration
• Packaging and product information where supplied

Note: Confirm included components before installation.

 

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Installation Notes

• Measure compressed length, extended length, travel, and mounting width before ordering
• Confirm mount style and clearance through the full suspension cycle
• Professional fabrication and suspension setup are recommended for custom chassis work
• Do not use the shock as a suspension limiter unless the chassis is designed for that load path

Buyer is responsible for use in accordance with applicable vehicle, road, off-road, towing, racing, and local laws.

 

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Warranty Information

Bilstein warranty coverage varies by product category and market. Customers should review the current Bilstein warranty documentation and retailer purchase record for eligibility, claim steps, and coverage duration before service or refreshment work begins.

Warranty coverage typically excludes improper installation, misuse, modifications, electrical issues, overloading, tampering, impact damage outside warranty terms, or non-compliant use; proof of purchase may be required for warranty claims.