Swift Spec-R Sport Springs | 2017-2021 Honda Civic Si (4H918R)


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$357.75 $477.00Instant Savings of 25% ($119.25)

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17+ Honda Civic Si Sport Springs 'Spec R' by Swift

Swift made Sport Springs keeps the quality ride you get from the showroom, and adds improved handling and lower ride height for driving enthusiasts and style minded drivers who demand only the best.

From HPDE events to SCCA competition, Swift Spec-R Sport Springs are made for the track enthusiast looking to take their vehicle to the next level.

Swift Spec-R Sport Springs were engineered with 3 characteristics in mind. Modified ride height compared to Sport Springs to maximize optimal suspension geometry. Further increasing the spring rate to enhance overall performance. The increase in spring rate is based on the upper limits of the vehicles factory shock valving. Maintaining optimal comfort level for street use.

Spec R springs are wound with the same engineering and material as our sports springs. With the exception of stiffer rates and slight change in ride height; you can expect the same characteristics as our sports springs.


  • Front Spring Rate: 4 kg/mm (223 lbs/in)
  • Rear Spring Rate: 5.7 kg/mm (319 lbs/in)
  • Front Drop: -1.1in (28mm)
  • Rear Drop: -1.1in (28mm)


  • 2017 - 2021 Honda Civic Si


  • Maintains showroom-quality ride
  • Optimizes suspension geometry
  • Enhances performance and handling

What's In The Box?

  • 2 - Spec R Front Springs
  • 2 - Spec R Rear Springs


  • Manufacturer Standard Warranty

Customer Reviews

Based on 17 reviews
Gerard Lee
Modest drop, handles so much better

Not the lowest drop but very functional for a daily driver. Feels more locked in turns. Sport mode just a little bit bumpier. But very pleased!

Perfect Springs

Parts came sooner than expected and it great packaging. Installed them the next day and I can’t stress how much I love the ride. Perfect amount of drop too, not too low to the point where it could affect spirited driving.

Great springs

I love the way they feel way stiffer then stock good height I daily my car doesn’t bother me at all would recommend To anyone who wants the stiffer more track feel

Mike M
Good on my 2017 Hatchback sport

I installed these after work and they give the vehicle a good drop. Not too much but enough where you dont have to worry about Shox blowing etc but its esthetically pleasing. I cut my bump stops a bit and still feel a bit of bounce. I do recommend lowering spring silencers as the spring hits itself while parking and makes a soft clunk sound. This is common in lowering springs ive learned. Make sure to tighten everything and as they settle re tighten again a few days later.

Will Hanson
Nice quality

Near factory ride feel. Slightly better performance and about 1”drop.