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Product Details
| Part Number: | SSU-4H921R |
| Brand: | Swift Springs |
| Location: | Front and Rear |
| Position: | Left and Right (Driver and Passenger) |
| Front Spring Rate: | 4K |
| Rear Spring Rate: | 5K |
Take the handling and stance of your 2022+ Acura Integra A-Spec (DE4) to the next level with the Swift Spec-R Lowering Spring Kit, Part #4H921R. Developed for enthusiasts who want more performance from the factory suspension, Swift Spec-R springs combine increased spring rates with a carefully engineered drop to deliver sharper handling while retaining street-friendly ride quality.
Swift designed the 4H921R specifically for the DE4 Integra A-Spec chassis, with spring rates of 4.1 kgf/mm front and 5.7 kgf/mm rear. The kit lowers the vehicle approximately 1.25 inches in front and 1.1 inches in the rear, reducing wheel gap and lowering the center of gravity for a more aggressive stance and improved chassis response.
Unlike lowering springs focused solely on appearance, Swift's Spec-R Series is developed with track performance in mind. The spring rates are designed around the upper limits of the factory damper valving, providing increased chassis control for spirited street driving, autocross, HPDE, and track use while remaining comfortable enough for daily driving.
Features
- Swift Spec-R performance lowering spring kit
- Designed specifically for the 2022+ Acura Integra A-Spec
- Fits the DE4 chassis
- Approximately 1.25-inch front drop
- Approximately 1.1-inch rear drop
- 4.1 kgf/mm front spring rate
- 5.7 kgf/mm rear spring rate
- Track-oriented spring rates designed around the capabilities of the factory shock valving
- Lowers the vehicle's center of gravity
- Helps reduce body roll during hard cornering
- Improves overall chassis control and stability
- Provides sharper, more responsive steering feel
- Helps control unwanted suspension movement during acceleration, braking, and cornering
- Reduces factory wheel gap for a cleaner, more aggressive stance
- Vehicle-specific engineering helps maintain proper suspension geometry
- Designed to maximize available suspension travel
- Track tested and tuned for performance
- Maintains a level of comfort suitable for daily street driving
- Excellent for spirited street driving, autocross, HPDE, SCCA, and track-day use
- Designed to work with the vehicle's OEM dampers
- Complete set of four lowering springs
- Genuine Swift Springs performance suspension product
Spring Rates
- Front: 4.1 kgf/mm
- Rear: 5.7 kgf/mm
Approximate conversion:
- Front: 230 lb/in
- Rear: 319 lb/in
Lowering Amount
- Front: Approximately 1.25 inches
- Rear: Approximately 1.1 inches
The slightly greater front drop helps give the Integra a balanced, purposeful stance while reducing the excessive wheel gap associated with the factory ride height.
Vehicle Fitment
- 2022+ Acura Integra A-Spec
- Chassis: DE4
Important: Part #4H921R is for the DE4 Integra A-Spec, not the DE5 Integra Type S. The Type S uses Swift part #4H925R.
Product Specifications
- Manufacturer: Swift Springs
- Part Number: 4H921R
- Series: Spec-R
- Product Type: Performance Lowering Springs
- Vehicle: Acura Integra A-Spec
- Chassis: DE4
- Model Years: 2022+
- Front Spring Rate: 4.1 kgf/mm
- Rear Spring Rate: 5.7 kgf/mm
- Front Drop: Approx. 1.25"
- Rear Drop: Approx. 1.1"
- Quantity: 4 Springs / Complete Vehicle Set
Spec-R Performance
- Swift developed its Spec-R Series for drivers looking for a more track-focused suspension setup without sacrificing the ability to drive the vehicle comfortably on the street. Compared with conventional street lowering springs, Spec-R springs use increased spring rates and performance-oriented ride heights to maximize chassis response and suspension geometry.
- The increased rates help keep the chassis flatter during aggressive cornering while improving steering response and overall road feedback. Swift specifically positions Spec-R springs for enthusiasts participating in activities such as HPDE and SCCA competition while still using their vehicles on the street.
Designed Around Factory Dampers
- One of the advantages of the 4H921R is that it was developed around the capabilities of the factory suspension. Swift describes its Spec-R spring rates as being engineered near the upper limits of the vehicle's OEM shock valving, allowing owners to achieve a meaningful increase in suspension performance without immediately requiring a complete coilover system.
Fitment & Installation Note
- A professional four-wheel alignment is recommended after installation. Lowering the vehicle changes suspension geometry, and alignment should be checked to ensure proper handling and tire wear.
- Vehicles equipped with aggressive aftermarket wheel and tire combinations should also be checked for adequate tire-to-fender and suspension clearance after lowering.
The Swift 4H921R Spec-R Lowering Spring Kit is an excellent suspension upgrade for the 2022+ Acura Integra A-Spec DE4, providing a combination of track-inspired handling, increased chassis control, sharper steering response, reduced body roll, and an aggressive 1.25"/1.1" lowered stance without requiring the move to a full coilover suspension system.
Due to the manufacturer's price control policy, this item may be excluded from promotions and discounts
WARNING: This product may contain chemicals known to the State of California to cause cancer or birth defects. www.P65Warnings.ca.gov.
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