Civic Si Lowering Springs Master Guide

justasimpleman

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FYI, anyone looking for pro kit, pretty sure they’re on back order everywhere at the moment.
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Tyler.iguess

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im stuck between swift and eibach springs
i cant say i want the comfort aspect of eibach. just the stiffer rate
 

alxgravel

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Np! Btw, if you have 18x9.5" wheels, it might be tough to fit 265/35 with a drop unless you get +45 offset
Looks like 18x9.5 +45 offset are rare...

+38 are the most and +40

I'm trying to figure it out between 265 or 255

255 should be more conservative. Does 9.5 fit on 255 with +38 offset? Maybe going whiline 0.8 drop or switf ... switf are the best about what I read everywhere. So maybe going for those. So 1.1 drop front end rear.

Have the winter to think about it and do my research.

Honda Civic 10th gen Civic Si Lowering Springs Master Guide Screenshot_20210902-114941_Chrome


Honda Civic 10th gen Civic Si Lowering Springs Master Guide Screenshot_20210902-114910_Chrome


Honda Civic 10th gen Civic Si Lowering Springs Master Guide Screenshot_20210902-115853_Chrome
 


alxgravel

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@alxgravel yup, it's hard to find 18x9.5 +45 in a 5x114.3 configuration.

If you go 18x9.5 in +38 or +40, then 255/35 is your best bet. Should be fine with a mild drop.
Yea will going that route maybe lol +45 are like minimum 500 cad per mag here -_-

Thx bro to helping me on my way to new mag and drop ! ??
 

Sirmais

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I'm running on Eibach Pro-kit springs. But they feel too soft. Do you know if I will upgrade to some Bilstein or Koni, will it change something?
Previously on all cars I was doing H&R + Bilstein B6. And for me it was ultimate setup. But in Europe I couldn't find any H&Rs for 2020 civic 4d.
 

alxgravel

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I'm running on Eibach Pro-kit springs. But they feel too soft. Do you know if I will upgrade to some Bilstein or Koni, will it change something?
Previously on all cars I was doing H&R + Bilstein B6. And for me it was ultimate setup. But in Europe I couldn't find any H&Rs for 2020 civic 4d.
That is why I'm maybe going swift spring, I think they are the best on here.
 

ManitobaSI

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Do the swift’s have to have jackets on them to reduce metal rubbbing noise. Also the rears are touching on the coils. How will their coating hold up in winter?
 

alxgravel

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Here is the link and unity performance have them now :) !
http://swiftsprings.wpengine.com/products/sports-springs-spec-r : Looks for info
https://unity-performance.com/collections/2017-civic-si/products/swift-spec-r-sport-springs-civic-si
From what a read they are really the best spring and are good quality. They are maybe paint coated? I will buy them and wait until next spring to install them. When winter will come I will remove them because I don't want to be a snow plow on the road . Here is heavy snow storm.
 


Sirmais

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H&R replied that for non SI 4dr model correct H&R code is:

part number: 28723-2
  • Honda Civic 4DR + 5DR
  • Type FC/FK
  • from 2017 on
  • without ADS
  • front axle load 896 kg and heavier
  • lowering approx. 35 mm
 

Jublien

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What would the spring rate difference be for the Spoon sports progressive springs compared to stock si springs? Spoon Progressive Spring Rates: Front 2.7 kgf/mm, 3.2 kgf/mm Lowers 30mm Front and Rear. I haven't found much info comparing it to stock si springs.
 

Ronny2019

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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.
I know this has been dead for a min but i have a 2019 si coupe and wanted to know if the h&r sport springs fit? Thanks in advance
 


 


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