TL;DR
Get business pricing on garage and car supplies
- Business-only prices and quantity discounts
- Tax-exempt purchasing
- Multiple users, one account, clear invoices
Roadster Shop has revealed the RS4 OBS, a complete aftermarket chassis designed for 1988–1998 Chevrolet and GMC pickups. It starts at $45,000, while selected options—including $5,000 satin-black powder coating—can bring the price to about $60,000. The package includes upgraded suspension and axle components, but the final cost depends on configuration.
Roadster Shop has introduced the RS4 OBS, a complete aftermarket chassis for 1988–1998 Chevrolet and GMC pickups, with a reported starting price of $45,000. The purpose-built platform replaces the truck’s original frame and suspension with upgraded components for custom builds; optional equipment can raise the price to about $60,000, a substantial investment for trucks that may be bought for far less.
The RS4 OBS uses 5-by-2.5-inch frame rails with 0.188-inch-thick walls, according to The Drive’s report. Its suspension setup pairs Currie Dana 44 front and Dana 60 rear differentials with triangulated four-links. Roadster Shop says that layout is intended to manage anti-dive, anti-squat and suspension articulation. The chassis also comes with Fox Racing 2.5 Factory Race Series coilovers, with valving tuned by Roadster Shop.
Roadster Shop says it uses sealed X-axis flex joints rather than spherical or Johnny-style joints, citing noise, vibration and harshness considerations and expected durability. The package also features front steering geometry developed with computer-aided design. Buyers can select from engine mounting kits for the original small-block configuration, other small- or big-block Chevrolet engines, LS engines and LT1 or LT4 engines. The report says factory mounting locations for 1988–1998 GMT400 trucks are standard.
Options described in the report include disc-brake packages, stainless-steel brake lines, a Fox ATS steering stabilizer kit and an Atlas transfer case for four-wheel-drive builds. Satin-black powder coating costs an additional $5,000. The report puts the base price at $45,000 and says the total can reach $60,000 depending on options; it does not provide a complete itemized configuration at that upper figure.
A High-Cost Route to a New Truck Foundation
The RS4 OBS gives GMT400 owners a way to build around a new chassis rather than restoring or modifying the factory frame. That could appeal to people planning high-powered, custom or performance-oriented trucks, particularly when their project already includes extensive changes to the engine, suspension or drivetrain. The chassis is presented as a complete foundation, potentially reducing the need to piece together those systems separately.
The price is a central part of the news. At $45,000 before options, the chassis alone can cost considerably more than the roughly $15,000 truck price cited in the story’s framing. That comparison excludes installation, the donor vehicle and the other parts and labor needed to finish a build. The package is therefore aimed at buyers willing to spend substantially on a specialized project, not simply owners seeking an inexpensive replacement frame.
Roadster Shop’s stated engineering goals and component choices describe the product, but they do not establish how it performs in real-world use or whether it represents good value for a particular buyer. Those judgments depend on the chosen configuration, installation, intended use and completed build cost.
As an affiliate, we earn on qualifying purchases.
Built for 1988–1998 GMT400 Trucks
GMT400 is the platform designation associated with Chevrolet and GMC pickups from the 1988–1998 model years. The RS4 OBS is designed specifically around those trucks, which Roadster Shop identifies as the intended base for custom builds. The reported standard factory mounting locations are meant to retain compatibility with the original platform while allowing buyers to select different engine mounts and drivetrain options.
Roadster Shop is known for supplying chassis for restomod projects, according to The Drive. The RS4 OBS extends that product approach to this generation of GM pickups. The report describes the frame as a new, complete assembly rather than a collection of individual suspension parts, but it does not detail installation time, required modifications to every truck configuration or the full contents of each price tier.
““optimize anti-dive, anti-squat, and suspension articulation.””
— Roadster Shop, as quoted on its website in The Drive’s report
custom truck chassis for 1988-1998 pickups
As an affiliate, we earn on qualifying purchases.
As an affiliate, we earn on qualifying purchases.
Pricing, Fitment and Delivery Details
The reported $45,000 starting price and potential total of about $60,000 do not come with a full itemized price list in the source report. It is not clear which parts are included in the base configuration, which options account for the upper figure, or whether shipping, taxes or installation are included. The $5,000 powder-coating charge is identified separately, but the report does not explain the pricing of the other options.
The source also does not state when orders will ship, how long assembly or installation typically takes, or whether every cab, bed, engine and four-wheel-drive configuration is supported without modification. Roadster Shop’s claims about the setup’s engineering intent and joint characteristics are not accompanied in the report by independent test results or long-term reliability data.
performance suspension components for GM trucks
As an affiliate, we earn on qualifying purchases.
As an affiliate, we earn on qualifying purchases.
Buyers Need a Full Build Quote
Anyone considering the RS4 OBS will need to confirm current pricing, availability and fitment directly with Roadster Shop. A useful quote would identify the exact chassis configuration, axle and brake choices, engine mounts, transfer-case provisions, finish, shipping and any installation work. Those details will determine whether a project remains near the base price or approaches the reported $60,000 figure.
The next practical milestone is clarification from the company on what each package includes and how it supports specific GMT400 configurations. Until those details are available, the confirmed development is the introduction of a new complete chassis and its stated starting price—not a final estimate for a finished truck.
off-road truck coilover suspension
As an affiliate, we earn on qualifying purchases.
As an affiliate, we earn on qualifying purchases.
Key Questions
What is the Roadster Shop RS4 OBS?
It is a complete aftermarket chassis designed for 1988–1998 Chevrolet and GMC GMT400 pickups, with upgraded frame, axle and suspension components.
How much does the chassis cost?
The reported starting price is $45,000. The Drive says selected options can bring the price to about $60,000, but the report does not include a complete price breakdown.
What suspension and axles does it use?
The reported setup includes Currie Dana 44 front and Dana 60 rear differentials, triangulated four-links and Fox Racing 2.5 Factory Race Series coilovers.
Can buyers choose different engines or a four-wheel-drive setup?
The report says engine mounting options cover the original small-block, other small- and big-block Chevrolet engines, LS engines, and LT1 or LT4 engines. An Atlas transfer case is available as an option for four-wheel-drive builds.
Does the reported price include installation?
The source does not say whether installation, shipping, taxes or other project costs are included. Buyers should request an itemized quote for their specific truck and configuration.
Source: rss
Fall Picks
fall essentials
As an affiliate, we earn on qualifying purchases.
