Civic Si Lowering Springs Master Guide

Mr.Apex

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I am new to this platform and forum and had run into troubles trying to find lowering spring info and options for the 10th gen SI (FC1/FC3) so i decided to create a master thread dedicated to the SI specifically like the one that exists here for the Type R (FK8).
Another good reference thread is here where members have posted pictures of most setups.
All info is from a representative at the company or the companies website itself.
If you found this thread helpful please shoot me a thanks id really appreciate it.:thumbsup:



SI OEM
Front Spring Rate: 144.186 lbs/in
Rear Spring Rate: 208.776 lbs/in

(FK8) CTR OEM for reference
Spring Rate Front: -263.2 lbs/in
Spring Rate Rear: -235.2 lbs/in


Eibcah PRO-KIT Performance Springs
2017- 2020 Civic Si Sedan/Coupe
Part # E10-40-036-02-22
Drop Front: .9"
Drop Rear: 1.1"
Spring Rates (Progressive)
Front: 137-177 lb/in
Rear: 83-256 lb/in
$230
Best price found here


Eibach SPORT LINE
2017-2020 Civc Si Sedan/Coupe
Part # E20-40-036-02-22
Drop Front: 1.7"
Drop Rear: 1.8"
Spring Rates (Progressive)
Front: 120-202 lb/in
Rear: 74-280 lb/in
$261 Everywhere



D2 Racing Lowering Springs
2016-2020 Honda Civic/2017-2020 Civic Si
Part# D2R D-SP-HN-25-3
Front Drop (Coupe/Sedan): 1.7"
Rear Drop (Coupe/Sedan): 1.9"
Progressive Spring Rate
Spring Rates 20% Stiffer than stock
Approx Math Front 173.02 lb/in Rear 250.54 lb/in
$170
Best price found here


Swift Spec R
17+ Civic Sport/SI
Part# 4H918R
Front Drop: 1.1"
Rear Drop: 1.1"
Spring Rate (Dual)
Front 229.5 lbs/in
Rear 319.2 lbs/in
$298
Best price found here


Skunk 2
'16-'18 Civic
Part# 519-05-1775
Front Drop: 1.375"
Rear Drop: 1.25"
Progressive Rates
Drop varies by chasis not specifically listed as SI compatible
$173
Best price found here


K Tuned
16+ Civic (Coupe/Sedan/Hatchback) - DOES NOT FIT TYPE R
Part# KTD-K1S-FC3
Drop Front: 0.9"
Drop Rear: 1"
Spring Rate (Front): 173.6 lb/in
Spring Rate (Rear): 252 lb/in
$270
Best price found here


Whiteline
Listed as compatible with all 10th gen
Part# WSK-HON017
Drop Front: .8"
Drop Rear: .8"
Spring Rate (Progressive)
Front 253 lb/in
Rear 286 lb/in
$233
Best price found here


Tein S Tech
FC1/FC3/FK7
Part# SKHH6-AUB00
Front Drop 1.2"
Rear Drop 1.0"
Spring Rate Front 146 lb/in
Spring Rate Rear 174 lb/in
$172
Best price found here

Tein H Tech
SI 2DR/4DR
Part# SKHH6-BUB00
Front Drop .06"
Rear Drop 2DR .06/ 4DR .04
Spring Rate Front 134 lb/in
Spring Rate Rear 162 lb/in

RS*R
2016+ Honda Civic Coupe / Sedan
Part#: H057D
Drop for Coupe:
Front 1.0in to -1.2in
Rear 1.4in to -1.6in
Drop for Sedan:
Front 1.0in to -1.2in
Rear 1.2in to -1.4in
Spring Rates
Front 148.40 lb/in
Rear 188.71 lb/in
$245
Best price found here


H&R Sport Springs
2016-2020 Honda Civic (Community confirmed fitment with SI)
Part# H&R 51892
Front Drop ~1.25"
Rear Drop ~1"
Spring Rate (Progressive)
$233
Best price found here



Fell free to post pictures of your setups just be sure to list what springs youre running.
If any of this info is incorrect please let me know or if you have something to add and ill continue to update this post.





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Last edited:

SIckone

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I am new to this platform and forum and had run into troubles trying to find lowering spring info and options for the 10th gen SI (FC1/FC3) so i decided to create a master thread dedicated to the SI specifically like the one that exists here for the Type R (FK8).
Another good reference thread is here where members have posted pictures of most setups.
All info is from a representative at the company or the companies website itself.
If you found this thread helpful please shoot me a thanks id really appreciate it.:thumbsup:



SI OEM
Front Spring Rate: 144.186 lbs/in
Rear Spring Rate: 208.776 lbs/in

(FK8) CTR OEM for reference
Spring Rate Front: -263.2 lbs/in
Spring Rate Rear: -235.2 lbs/in


Eibcah PRO-KIT Performance Springs
2017- 2020 Civic Si Sedan/coupe
Part # E10-40-036-02-22
Drop Front: .9"
Drop Rear: 1.1"
Spring Rates (Progressive)
Front: 137-177 lb/in
Rear: 83-256 lb/in
$230
Best price found here


Eibach SPORT LINE
TBD But in final stages to be realeased soon according to Kevin @ Eibach 2/20/20


D2 Racing Lowering Springs
2016-2020 Honda Civic/2017-2020 Civic Si
Part# D2R D-SP-HN-25-3
Front Drop (Coupe/Sedan): 1.7"
Rear Drop (Coupe/Sedan): 1.9"
Progressive Spring Rate
$170
Best price found here


Swift Spec R
17+ Civic Sport/SI
Part# 4H918R
Front Drop: 1.1"
Rear Drop: 1.1"
Spring Rate (Dual)
Front 229.5 lbs/in
Rear 319.2 lbs/in
$298
Best price found here


Skunk 2
'16-'18 Civic
Part# 519-05-1775
Front Drop: 1.375"
Rear Drop: 1.25"
Drop varies by chasis not specifically listed as SI compatible
$173
Best price found here


K Tuned
16+ Civic (Coupe/Sedan/Hatchback) - DOES NOT FIT TYPE R
Part# KTD-K1S-FC3
Drop Front: 0.9"
Drop Rear: 1"
Spring Rate (Front): 173.6 lb/in
Spring Rate (Rear): 252 lb/in
$270
Best price found here


Whiteline
Listed as compatible with all 10th gen
Part# WSK-HON017
Drop Front: .8"
Drop Rear: .8"
Spring Rate (Progressive)
Front 253 lb/in
Rear 286 lb/in
$233
Best price found here


Tein S Tech
FC1/FC3/FK7
Part# SKHH6-AUB00
Front Drop 1.2"
Rear Drop 1.0"
Spring Rate Front 146 lb/in
Spring Rate Rear 174 lb/in
$172
Best price found here


RS*R
2016+ Honda Civic Coupe / Sedan
Part#: H057D
Drop for Coupe:
Front 1.0in to -1.2in
Rear 1.4in to -1.6in
Drop for Sedan:
Front 1.0in to -1.2in
Rear 1.2in to -1.4in
Spring Rates
Front 148.40 lb/in
Rear 188.71 lb/in
$245
Best price found here

Fell free to post pictures of your setups just be sure to list what springs youre running.
If any of this info is incorrect please let me know or if you have something to add and ill continue to update this post.
Thank you for doing this. So appreciated.
 

arpypat

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Does anyone know if Type R springs fit the Si sedan?

I wish someone would make stiffer springs for the Si, but w/o any drop. I think the stock height is perfect. The ktuned ones have a desirable spring rate, but the car is dropped too low for my taste.

I'm thinking about the new Tein coils for the Si, but even on the highest setting, it's 0.8" lower than stock.

Anyone have pics and/or reviews on the Whiteline ones?
 

Rafi27

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Does anyone know if Type R springs fit the Si sedan?

I wish someone would make stiffer springs for the Si, but w/o any drop. I think the stock height is perfect. The ktuned ones have a desirable spring rate, but the car is dropped too low for my taste.

I'm thinking about the new Tein coils for the Si, but even on the highest setting, it's 0.8" lower than stock.

Anyone have pics and/or reviews on the Whiteline ones?
HFP suspension is probably your best bet
 

arpypat

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Maybe it's my imagination, but the back looks higher than the front to me. I'm fine with the front height; wish there was a way to lower just the back.
The lines of the car make it seem like the front is lower.

If you park on a level surface and measure from the center of your wheels to the fenders, you'll find that the front and rear measurements are near identical. Mine was about 14.5" on all 4 corners.
 

joshhjackson2112

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Do I understand correctly that the Eibach Pro-Kit yields a mild or conservative drop?
Yeah it is not a big drop. Good choice for people that want to limit rub from little to none with aggressive wheel/tire specs with the added benefit of lowering. Considered it myself many times but have changed my interests to Tein Coils
 

Vegas Viking

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Yeah it is not a big drop. Good choice for people that want to limit rub from little to none with aggressive wheel/tire specs with the added benefit of lowering. Considered it myself many times but have changed my interests to Tein Coils
IF I were to ever lower, I'd probably go with these Eibachs. Wouldn't want anything too drastic. Coilovers won't work with our dampers, correct?
 

pinhead66

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IF I were to ever lower, I'd probably go with these Eibachs. Wouldn't want anything too drastic. Coilovers won't work with our dampers, correct?
Ground control does make a coilover kit that fits and works on the stock Si electronic dampers. It claims to have a range of stock height down to 1.75" lower. You can even pick your own spring rates. From reading various reviews though it seems to be more for tracking the car as it makes quite a bit of noise and racket.
 

arpypat

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IF I were to ever lower, I'd probably go with these Eibachs. Wouldn't want anything too drastic. Coilovers won't work with our dampers, correct?
Any coilover kit will work. But once you disconnect the factory dampers, you'll get a light on your dash saying there's an issue with the Adaptive Damper System.

Some companies sell modules to plug into the factory damper connector that will simulate the electronic load of the factory damper and make sure you don't get any dash lights. People are calling these modules "ADS cancellers".

AFAIK, Tein is the only company that gives you the ADS canceller modules included with their Flex Z coilover kit.
 

Jaxson

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Any coilover kit will work. But once you disconnect the factory dampers, you'll get a light on your dash saying there's an issue with the Adaptive Damper System.

Some companies sell modules to plug into the factory damper connector that will simulate the electronic load of the factory damper and make sure you don't get any dash lights. People are calling these modules "ADS cancellers".

AFAIK, Tein is the only company that gives you the ADS canceller modules included with their Flex Z coilover kit.
But whyyyy get rid of the ADS? haha <= rhetorical question. I reallly like the stock setup and would not get rid of it but I can see why someone might not care for it and go to a manual adjustable setup.
 

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