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Build a properly matched suspension or steering setup with this QA1 rear suspension systems. Manufacturer part number R121-200 is offered in the listed Rear Suspension System for 1973-1979 Ford F-100 and F-150 SWB configuration, so vehicle application, mounting position, dimensions, spring rate, adjustment range, and all notes must be confirmed before ordering.
Key Features
- Provides an adjustable 4 to 7 inch drop.
- Single adjustable shocks with 18 damping positions.
Fitment
| Years | Make | Model | Submodel or Application |
|---|---|---|---|
| 1973-1979 | Ford | F-100 | All listed configurations unless otherwise noted |
| 1973-1979 | Ford | F-150 | All listed configurations unless otherwise noted |
Confirm chassis configuration, suspension position, drivetrain clearance, brake package, wheel and tire clearance, and every current QA1 application note.
Specifications
| Brand | QA1 |
|---|---|
| Manufacturer Part Number | R121-200 |
| Product Type | Rear Suspension Systems |
| Listed Configuration | Rear Suspension System for 1973-1979 Ford F-100 and F-150 SWB |
| Compatibility Basis | Vehicle Specific |
| Condition | New |
What's Included
One new QA1 rear suspension systems identified by manufacturer part number R121-200, with only the components and hardware supplied by QA1 for that exact part number.
About QA1
QA1 develops suspension, steering, driveline, rod-end, bearing, spring, and chassis components for street, performance, racing, restoration, and custom vehicle applications.
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- Shop all QA1 products
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Frequently Asked Questions
Will QA1 R121-200 fit my 1973-1979 Ford F-100?
Match the complete fitment row, then verify mounting position, suspension configuration, drivetrain clearance, brake package, wheel and tire clearance, and every current QA1 note.
What measurements matter when ordering QA1 R121-200?
Verify the dimensions and interfaces named in this listing, including thread size and direction, extended and compressed length, bore, spring dimensions or rate, mounting style, and available clearance as applicable.
Does QA1 R121-200 require setup after installation?
Suspension and steering work commonly requires torque verification, clearance and travel checks, ride-height or damping setup when adjustable, and a professional alignment before road use.
Installation
Follow the current QA1 instructions for this exact part number. Support the vehicle safely, compare every component before disassembly, use the specified hardware and torque values, verify thread engagement and mounting orientation, cycle the suspension through its operating range, check brake and wheel clearance, and complete an alignment when the installation changes suspension or steering geometry.
QA1
Shop QA1 coilovers, shocks, springs, control arms, sway bars, suspension systems, rod ends, bearings, steering components, and chassis hardware by exact part number and verified compatibility. Choosing the Correct QA1 Product Match the complete year, make, model, suspension configuration, and mounting position when vehicle fitment is listed Verify dimensions, thread size and direction, bore, travel, spring rate, load, and mounting style for interface-based components Confirm drivetrain, brake, wheel, tire, exhaust, and chassis clearance before ordering Review the current QA1 application data and installation instructions for the exact part number Related QA1 Products All QA1 Products QA1 High Travel Coilover Spring QA1 C Series Rod End QA1 Proma Star Coilover Shock Frequently Asked Questions How do I confirm a QA1 product fits my vehicle?Match the listed year, make, model, and submodel, then verify suspension configuration, mounting position, dimensions, drivetrain clearance, b...
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