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 introduced the RS4 OBS, a complete aftermarket chassis designed for 1988–1998 Chevrolet and GMC pickups. The chassis starts at $45,000, and selected options can raise the price to around $60,000; the source report compares that cost with pickups that may sell for about $15,000, but does not specify a market survey or valuation basis.
Roadster Shop has introduced the RS4 OBS, a complete custom chassis for 1988–1998 Chevrolet and GMC pickups that starts at $45,000. The reported price can reach about $60,000 with options, putting the chassis well above the roughly $15,000 pickup price cited in the report and making it a major cost consideration for owners planning a GMT400 build.
The RS4 OBS is sold as a new, complete platform, rather than a collection of individual suspension parts. Roadster Shop specifies laser-cut frame rails measuring 5 by 2.5 inches with .188-inch wall thickness, along with Currie Dana 44 front and Dana 60 rear differentials. Triangulated four-link suspension is intended, according to the company, to manage anti-dive, anti-squat and suspension articulation.
The chassis includes Fox Racing 2.5 Factory Race Series coilovers, with valving tuned in-house by Roadster Shop. The company also uses sealed X-axis flex joints instead of spherical or Johnny-style joints; its stated rationale is improved noise, vibration and harshness performance and durability. The front steering geometry is CAD-optimized, according to the report.
Roadster Shop lists engine mounting options for the original 1988–1998 GMT400 setup and other small- and big-block Chevrolet engines, as well as LS and LT1/LT4 applications. An Atlas transfer case is available for four-wheel-drive builds. Buyers can also choose among disc-brake packages, stainless-steel brake lines and a Fox ATS steering stabilizer kit. Satin-black powder coating is listed as a $5,000 option. The source report does not provide a complete itemized configuration showing precisely how the price reaches $60,000.
A High-Cost Foundation for GMT400 Builds
The RS4 OBS offers owners a route to build a GMT400 around a purpose-made replacement platform, rather than relying solely on the truck’s original chassis and suspension. That may appeal to builders seeking a heavily modified street or off-road project, but the $45,000 starting price is substantial before the cost of a donor truck, powertrain, bodywork and final assembly.
The contrast with a pickup priced around $15,000 highlights the difference between the cost of the vehicle and the cost of a high-spec custom foundation. It does not establish that all GMT400 pickups sell for that amount, or that installing the chassis will increase a truck’s resale value. The source gives no market analysis or return-on-investment estimate, so buyers would need to weigh the build’s intended use and total budget rather than treat the chassis price as a measure of the completed vehicle’s value.
As an affiliate, we earn on qualifying purchases.
Designed for 1988–1998 GM Trucks
GMT400 is the designation for GM’s 1988–1998 pickup generation, sold in Chevrolet and GMC forms. Roadster Shop presents the RS4 OBS as a purpose-built chassis for those trucks, positioning it for restomod projects that retain the familiar pickup body while substantially changing what sits beneath it.
The Drive’s report notes that Roadster Shop has supplied chassis for other custom builds, including high-powered and high-value restomods. That history provides context for the company’s fabrication work, but it is not independent testing of the RS4 OBS. The report’s descriptions of the chassis’ likely ride, handling and durability benefits rely on the company’s specifications and claims.
““optimize anti-dive, anti-squat, and suspension articulation.””
— Roadster Shop, as quoted in The Drive’s report
Pricing and Performance Details Remain Open
The reported $45,000 starting price is clear, but the source does not detail which equipment is included in that base configuration or itemize the selections needed to reach roughly $60,000. It also does not provide a full option-price list, shipping costs, installation labor, or a delivery schedule.
Roadster Shop’s stated goals for suspension articulation, ride quality and durability are not accompanied in the report by independent testing, measured performance figures or long-term owner data. The comparison with pickups around $15,000 is also not tied to a specific condition, location, year or pricing dataset. The availability of the chassis and its options at the time of purchase is not established by the source.
Buyers Need a Full Build Quote
Prospective buyers will need to consult Roadster Shop’s current RS4 OBS listing or contact the company for an up-to-date base price, option pricing, lead times and fitment details. Before ordering, builders should confirm which engine mounts and drivetrain components suit their truck, particularly if they plan a four-wheel-drive setup.
The next practical step is comparing the chassis quote with the complete project budget, including the donor pickup, engine and transmission, body and interior work, installation and any required fabrication. The source report does not identify a scheduled production milestone, independent road test or confirmed delivery date.
Key Questions
What is the Roadster Shop RS4 OBS?
It is a complete custom chassis designed for 1988–1998 Chevrolet and GMC pickups, also known as GMT400 trucks.
How much does the chassis cost?
The source report gives a $45,000 starting price and says selected options can bring the cost to about $60,000. It does not provide a full itemized example of that higher configuration.
What suspension and axle components are specified?
The reported specification includes Currie Dana 44 front and Dana 60 rear differentials, triangulated four-link suspension and Fox Racing 2.5 Factory Race Series coilovers.
Which engines can be fitted?
Roadster Shop lists mounts for the original GMT400 engine arrangement and options for other small- or big-block Chevrolet engines, LS engines and LT1/LT4 applications. The report does not give a complete compatibility list for every build configuration.
Does the $45,000 price include installation?
The source report does not say whether installation is included. Buyers should confirm labor, shipping, included components and delivery timing directly with Roadster Shop before budgeting.
Source: rss
Halloween Picks
halloween
As an affiliate, we earn on qualifying purchases.
