Swift Spec-R Performance Springs | 17+ Honda Civic Si & 16+ Civic Sport (4H918R)

Regular price $477.00 USD $439.84 USD

In Stock! Special Order!

Part # SWF.4H918R

The Swift Spec-R Performance Springs are made for the true track enthusiast seeking to improve the overall performance feel of their Civic.

Spec-R Springs are engineered with 3 major characteristics:
  1. Lowered ride height to lower center of gravity and maximize suspension performance, allowing the vehicle to absorb road condition and maximum tire traction.
  2. Higher spring rate to enhance cornering speed through entry and exit. The increase in spring rate is based on the vehicle factory valving settings, meaning the Spec-R use the optimal rate for the OEM shock.
  3. Reaching the optimal medium for performance and comfort, to improve performance while keeping a comfortable ride.
The Spec R Lowering Springs for the trio of performance Civic's will drop your car 1 inch all around and work with the OEM Struts. This means you get a more aggressive ride but can still daily drive on them without issue.

  • Honda Civic Sport Hatchback [FK7] (2016, 2017, 2018, 2019, 2020)
  • Honda Civic Si Sedan [FC1] (2017, 2018, 2019, 2020)
  • Honda Civic Si Coupe [FC3] (2017, 2018, 2019, 2020)


  • Swift proprietary H5S.TW, same tech used by the 2004 Le Mans Champion
  • Powder coated black for corrosion resistance
  • Made to work with OE Magnetic Ride struts
  • Drops the car roughly 1 inch all around
  • Will work with CTR Driving Modes
  • Guaranteed to never sag
  • Made in Japan

Extended Information

  • Type: Performance Lowering Springs
  • Drop [Front / Rear]: 25 (1) / 25 (1) [mm (inches)]
  • Spring Rate [Front / Rear]: 3.8 / 5.5 [kgf/mm]
  • Chassis: FK7 / FC1 / FC3
  • Material: H5S.TW
  • Finish: Powder-coated Black
  • Warranty: Swift Lifetime Warranty
  • Notes: Released

Customer Reviews

Customer Reviews

Based on 6 reviews
a_s (Los Angeles, CA, US)

Super fast shipping. Just installed the springs over the weekend and loving it.

James K. (Los Angeles, CA, US)
Swift Spec R quality lowering springs

I chose Swift over other less expensive lowering springs because I wanted a quality lowering spring that had both the proper ride height and without sacrificing ride quality!

Reynaldo S. (San Francisco, CA, US)
Stiff springs

Just what I was looking for on my civic 👍🏼 Not too low they would be great on the track.

Andrew W. (Darien, IL, US)
Quality Springs

My initial impressions are that these Springs were designed and built with a purpose in mind and are performing as advertised. Better handling especially mid corner (very flat) and stock like ride. In my opinion I prefer the ride quality of these over stock. Enough firmness to give you a better feel of the road, but supple enough over rough pavement. Oh I almost forgot, they drop the car tastefully. I wasn't looking for a drastic drop, just enough to close the wheel gap. Very happy with these!

Ps. Just spend the extra money on these compared to other springs and you will get top quality in return

@cg555sd (McDonough, GA, US)

Not a first-time user of Tohatsu’s SWIFT springs. Used on a few of my past vehicles over the years, so anyway was well aware of their quality and craftsmanship. These lowered the car 7/8” (22.2mm) and this amount is perfect in my opinion for the stock struts and not altering the roll center drastically like some other lowering springs with their 1.5”+ drop. Function over form for myself and never been into the slammed look.

Luis R. (Houston, TX, US)
Swift Spring for 17+ Civic SI

Great Product, quality! Excellent costumer service! A+++

Customer Questions


In stock, non special order items can be returned within 30 days of the product arriving to your house or place of work.
Returns will NOT be accepted on Clearance Items, Final Sales, Special Orders, Opened, Installed, Incomplete, or Otherwise Used Products. In order to initiate a return, an RMA number must be requested and approved via e-mail.
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