Swift Spec-R Lowering Springs for 2012-2015 Honda Civic Si 4H915R
Swift Spec-R Lowering Springs for 2012-2015 Honda Civic Si 4H915R
Swift Spec-R Lowering Springs for 2012-2015 Honda Civic Si 4H915R
Swift Spec-R Lowering Springs for 2012-2015 Honda Civic Si 4H915R

Swift Springs

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SKU: 4H915R

Swift Spec-R Lowering Springs for 2012-2015 Honda Civic Si

$397.50

MSRP $530.00 You save $132.50

5.0
Rated 5.0 out of 5 stars
6 Reviews
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Fitment Notes

All fitment information on our website is provided by the manufacturer. It is the customer's responsibility to thoroughly read the product description and confirm fitment before placing an order and proceeding with installation.

Unless specified otherwise, all suspension products are designed for 2WD vehicles only. Any notes or descriptions related to electronic damping systems (EDC, DDS, etc.) apply strictly to vehicle fitment. Aftermarket coilovers are not compatible with OEM electronic damping control systems unless explicitly stated.

*Product images may not represent the actual SKU.

Handling Time

All handling times are estimates and may change at any time. If the item is out of stock, we’ll promptly inform you of the estimated wait time and suggest similar in-stock alternatives if you prefer to change the order.

  • In stock: 1 business day
  • Out of stock: TBD

30-Day Returns

Not quite right? No problem — we offer hassle-free 30-day returns on eligible items. A few exclusions apply.

More Information

1-Year Manufacturer Warranty

Swift Springs offers a limited 1-year warranty on their metric coilover springs against defects in materials and workmanship. This warranty applies to springs that are properly installed and used under normal conditions. Swift Springs will repair or replace defective springs at their discretion.

Product Details

The Swift Spec-R Lowering Springs for the 2012-2015 Honda Civic Si are the ideal spring upgrade for 9th-gen Si owners looking for a lower stance and improved cornering grip without the harshness of generic lowering springs. These Civic Si lowering springs deliver an approximate 1.2" front and 1.0" rear drop with spring rates of 4.7 Kg/mm front and 5.4 Kg/mm rear, engineered to work within the Si's OEM damper range. Built in Japan from Swift's proprietary H5S.TW high-tensile spring steel, these Si springs reduce body roll and improve throttle-on handling balance for autocross, HPDE events, and daily-driven fun.

Swift Spec-R Technology

  • Proprietary H5S.TW high-tensile spring steel, manufactured in Japan
  • Optimized ride height to maximize suspension geometry at lowered position
  • Increased spring rates tuned to usable shock stroke for balanced performance
  • Fewer coils reduce unsprung mass and completely eliminate coil bind
  • Quicker transient response for improved traction and road feedback
  • Vehicle-specific bump rubber engineering to prevent bottoming out

Features

  • Track-proven in HPDE and SCCA competition
  • Lowered center of gravity for improved cornering grip
  • Reduced body roll and sharper handling response
  • Comfortable enough for daily driving
  • Compatible with OEM and aftermarket shocks/struts
  • Direct bolt-on installation with no modifications required
Specifications
Part Number 4H915R
Part Name Swift Spec-R Lowering Springs
Vehicle 2012-2015 Honda Civic Si
Spring Rate - Front 4.7 Kg/mm
Spring Rate - Rear 5.4 Kg/mm
Approximate Drop - Front 1.2"
Approximate Drop - Rear 1.0"
Vehicle Fitment
  • 2012 Honda Civic Si
  • 2013 Honda Civic Si
  • 2014 Honda Civic Si
  • 2015 Honda Civic Si

Customer Reviews

5.0
Rated 5.0 out of 5 stars
Based on 6 reviews
100%would recommend these products
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6 reviews
  • TT
    Toshiaki T.
    Verified Buyer
    Reviewing
    Swift Spec-R Lowering Springs for 2021+ Acura TLX Type S
    Rated 5 out of 5 stars
    Great!

    Loved the amount the car dropped (not too much), feels OEM, easy to install, happy with the springs and the service from Springrates.

    Was this helpful?
  • HM
    Harvey M.
    Verified Buyer
    Reviewing
    Swift Spec-R Lowering Springs for 2021+ Acura TLX Type S
    Rated 5 out of 5 stars
    Perfect ride!

    After adding a new set of tires and wheels with a bigger offset to push the wheels out I needed a set of lowering springs to set them off and you had just what I needed. Got the installed and an alignment done and now every time I get in the car it feels like a new car to me. Improved not only the looks and handling, but also the ride. Firm, but not harsh and the electronic damping system on my 2023 Acura TLX Type S still works perfectly. Highly recommend!

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  • JG
    Joshua G.
    Verified Buyer
    Reviewing
    Swift Spec-R Lowering Springs for 2013-2018 Ford Focus ST (MK3)
    Rated 5 out of 5 stars
    Perfect

    Good amount of drop one inch just what i was looking for. Nice ride quality for a daily car but way improved handling i love these springs ❤️

    Was this helpful?
  • KH
    Khoa H.
    Verified Buyer
    Reviewing
    Swift Spec-R Lowering Springs for 2009-2020 Nissan 370Z (Z34)
    Rated 5 out of 5 stars
    370 swift springs and koni shocks

    Loved it, Springrates is very legit and shipped mine out quickly, got it in a couple days!

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  • RB
    Ryan B.
    Flag of United States
    Verified Buyer
    Reviewing
    Swift Spec-R Lowering Springs for 2020+ Toyota Supra (A90)
    Rated 5 out of 5 stars
    Spec-R Springs A90 Supra

    Delivery was super fast. Springs ride quality is great and the drop is perfect on the Supra. Couldn’t be happier with my purchase!

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