Buick GS 400 Parts & Accessories

Shop Buick GS 400 parts for spring changes, chassis upgrades and brake service at Black Ops Auto Works. Explore Ridetech and UMI suspension choices, then select the configuration for the exact year, engine and equipment on your Buick. Plan the ride height and companion components together.

Spring Choices and Ride-Height Planning

Compare the Ridetech big-block StreetGRIP front spring pair with the listed UMI factory-height spring package for their respective applications. The StreetGRIP reference is a front lowering-spring choice, while the UMI package supplies front and rear springs for its stated factory-height setup. Plan the desired stance, engine coverage and compatible dampers before choosing between an axle-specific change and a broader spring refresh.

Arms, Bushings and Sway Bars

UMI and Ridetech upper and lower arms, rear chassis braces and sway-bar components serve different parts of a handling refresh. Choose arm replacements for their specified joints and geometry; compare a bar or brace as a separate chassis component. The listed Ridetech AFX spindle also introduces a hub-and-brake compatibility project, so plan its supported hubs, calipers and brackets together rather than treating it as only a ride-height change.

Brake Service and Rear-Axle Components

Review applicable DFC hydraulic and friction references against the current brake assembly. Select the correct axle and service scope before combining drums, shoes, hoses or wheel cylinders. Eaton differential choices require identification of the installed axle, splines and ratio arrangement.

Choose Your Part

• Identify production year, engine and current ride height.
• Choose spring replacement, chassis work or brake maintenance.
• Match full applications and supplied components before combining parts.

Frequently Asked Questions

How do I compare the StreetGRIP pair with UMI factory-height springs?

The listed StreetGRIP product is a big-block front lowering-spring pair. The UMI reference is a front-and-rear spring package for its stated factory-height application. Compare the ride-height goal, exact engine/chassis coverage and axle contents with the damper setup planned for the car.

Does a front-spring pair include rear springs?

Only when expressly stated. Review each package’s supplied pieces.

What should I budget for an AFX spindle project?

Review the spindle’s supported hub, caliper/bracket, steering and wheel-clearance combination, plus any installation hardware required. Confirm which companion parts the exact package supplies before combining the spindle with separate brake components.

How do I select replacement wheel cylinders?

Match exact brake assembly, axle or side, bore and hydraulic connections.

What details identify a differential application?

Use the installed axle model, spline count and ratio or carrier requirements.

Related Collections

Contact our team about Buick GS 400 springs, chassis or brake-service components.