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Eibach - 2021 Honda Civic SI

Product Releases - 2021 Honda Civic SI

PRO-KIT

Every Eibach PRO-KIT is designed and tested by our suspension engineers and performance driving professionals to deliver an increase in steering response and improved vehicle dynamics for a sportier, more balanced feel without ever compromising safety or ride quality. By using our proprietary spring design, PRO-KIT provides the ultimate balance to take your passion for driving to a whole new level. Additionally, the reduction in fender gap and ground clearance also contributes to an enhanced aesthetic.

  • Performance handling and improved dynamics
  • Lower center of gravity
  • Stop quicker and corner faster
  • Reduced fender gap for enhanced aesthetics
  • Million-Mile Warranty

Ride Height:
Sedan: Front: -0.9" Rear: -1.1"
Coupe: Front: -0.9" Rear: -0.9"

2021 Civic SI Eibach Pro Kit Lowering Springs

SPORTLINE | PERFORMANCE SPRINGS

The Eibach SPORTLINE Kit features an even lower drop using our precision engineered progressive spring rates.

By lowering your car's center of gravity (CoG), our SPORTLINE springs further reduce squat during acceleration, body roll in corners and nose-dive under braking for a perfect balance between high performance, increased lowering and comfortable ride quality.

  • Motorsport inspired handling and appearance
  • Precision wound hi-tensile steel alloy, cold-formed, tempered and shot-peened for long lasting performance and durability
  • Progressive design for balance of sport performance and excellent ride quality
  • Engineered and tested to work perfectly with stock dampers
  • Million-Mile Warranty

Ride Height:
Sedan: Front: -1.7" Rear: -1.8"
Coupe: Front: -1.5" Rear: -1.7"

2021 Civc SI Eibach Sportline Lowering Springs

ANTI-ROLL-KIT | STABILIZER BARS

Complete your suspension upgrade with an Eibach ANTI-ROLL-KIT. Our sway bars allow critical fine-tuning of your Civic's handling characteristics by reducing body roll through increased design stiffness over stock bars. The result: increased handling and cornering grip in any performance-driving situation.

Manufactured from cold-formed steel alloy for precision performance and finished with a long lasting red powder coat finish, the ANTI-ROLL-KIT comes complete with all mounting hardware.

  • Performance tuned sway bars for improved handling and reduced body-roll
  • Perfectly balanced for optimum neutral-steering handling and precise turning response
  • Precision formed hi-tensile steel alloy, cold-formed, tempered and shot-peened for long-lasting performance and durability
  • Greasable urethane bushings for increased responsiveness
  • Precision forged ends and OEM style pressed bushing locators

Diameter
Front: 29 mm tubular non-adjustable
Rear: 22 mm tubular 2 way-adjustable

2021 Civic SI Front & Rear Sway Bars

REINFORCEMENT BRACE | STABILIZER SUPPORT

  • Billet aluminum construction
  • Precision fit components
  • Reduces flex during high lateral loads
  • Protects from potential damage using extreme rate stabilizer bars
2021 Civic SI Stabilizer Reinforcement Brace

END-LINK KIT | ADJUSTABLE END-LINKS

Enhance your Civic's handling performance with our fully adjustable Eibach END-LINK Kit. These end links help improve handling performance and provide a more stable ride by eliminating deflection of factory end-link bushings. Eibach end-links are sold in pairs and feature easy to adjust bodies and heavy-duty rod ends

  • Adjustable length for optimized stabilizer bar angle
  • Developed and tested for street performance
  • Heavy-Duty applications include Aurora ® rod ends
  • Hex ends and knurled body for easy adjustment
  • Systems sold in pairs
  • Exact fitment by using minimal production tolerances, resulting in exceptional wheel balance

PRO-SPACER | WHEEL SPACERS

  • All applications tested in rigid durability and fatigue test
  • Made from high-tensile-strength aluminum alloy
  • High grade corrosion protection through a special coating process (salt spray test according to DIN 50021)
  • Significant weight advantage compared to wheel-spacers made from steel
  • Sold in pairs

PRO-ALIGNMENT | CONTROL ARMS

  • Upper Control Arms: Machined billet aluminum UCA's w/ in-board bushings and spherical rod ends to correct excessive negative camber and prevent uneven tire wear
  • Lower Control Arms: Machined billet aluminum LCA's featuring heavy-duty spherical bearings for Improved driving feedback over factory stamped steel arms
  • Corrosion-resistant black anodized bodies
  • Fits vehicles with or without ADS
  • Sold in pairs

Before & After

Before
After

Coupe Products

Product Part # Front Rear MSRP Cart
ANTI-ROLL KIT - Front Adjustable End Link System AK41-40-036-04-FA
2017 to 2021
HONDA
Civic
Si Coupe
Replaces Factory End Links.
Note: Replaces Factory End Links.
$140.00
ANTI-ROLL KIT - Rear Adjustable End Link System AK41-40-036-04-RA
2017 to 2021
HONDA
Civic
Si Coupe
Replaces Factory End Links.
Note: Replaces Factory End Links.
$140.00
ANTI-ROLL KIT - Rear Anti-Roll Bar Brace AK41-40-036-05-RA
2017 to 2021
HONDA
Civic
Si Coupe
Rear Brace includes Rear End Link Kit.
Note: Rear Brace includes Rear End Link Kit.
$225.00
ANTI-ROLL-KIT (Front and Rear Sway Bars) E40-40-036-01-11
2017 to 2021
HONDA
Civic
Si Coupe
Front Sway Bar is Tubular and Non-Adjustable/ Rear Sway Bar is Solid and 2 Way-Adjustable.
29mm
22mm
Note: Front Sway Bar is Tubular and Non-Adjustable/ Rear Sway Bar is Solid and 2 Way-Adjustable.
$324.00
FRONT ANTI-ROLL Kit (Front Sway Bar Only) E40-40-036-01-10
2017 to 2021
HONDA
Civic
Si Coupe
Front Sway Bar is Tubular and Non-Adjustable.
29mm
Note: Front Sway Bar is Tubular and Non-Adjustable.
$180.00
PRO-ALIGNMENT 5.67476 Replacement Rod-End 5.6747019
2017 to 2021
HONDA
Civic
Si Coupe
Note:
$171.00
PRO-ALIGNMENT Camber Arm Kit 5.67476K
2017 to 2021
HONDA
Civic
Si Coupe
Camber Arm. Rear - Camber +3.0 to -3.0 degrees of Adjustments.
Note: Camber Arm. Rear - Camber +3.0 to -3.0 degrees of Adjustments.
$360.00
PRO-KIT Performance Springs (Set of 4 Springs) E10-40-036-02-22
2017 to 2021
HONDA
Civic
Si Coupe
Tested with factory dampers.
0.9 in
0.9 in
Note: Tested with factory dampers.
$261.00
PRO-SPACER Kit (10mm Pair) S90-6-10-012
2017 to 2021
HONDA
Civic
Si Coupe
Original studs must be changed. Longer studs are included.
Note: Original studs must be changed. Longer studs are included.
$99.00
PRO-SPACER Kit (15mm Pair) S90-6-15-038
2017 to 2021
HONDA
Civic
Si Coupe
Original studs must be changed. Longer studs are included.
Note: Original studs must be changed. Longer studs are included.
$103.00
PRO-SPACER Kit (20mm Pair) S90-6-20-015
2017 to 2021
HONDA
Civic
Si Coupe
Original studs must be changed. Longer studs are included.
Note: Original studs must be changed. Longer studs are included.
$110.00
PRO-SPACER Kit (30mm Pair) S90-4-30-027
2017 to 2021
HONDA
Civic
Si Coupe
Spacers can only be used with wheels that have cut-outs (facing the hub) to clear the stock studs. Please check as follows: Original stud length (i.e. 35mm) minus spacer-thickness (i.e. 25mm) = 10mm excess stud length. The cut-out should have a depth of 11mm.
Note: Spacers can only be used with wheels that have cut-outs (facing the hub) to clear the stock studs. Please check as follows: Original stud length (i.e. 35mm) minus spacer-thickness (i.e. 25mm) = 10mm excess stud length. The cut-out should have a depth of 11mm.
$133.00
REAR ANTI-ROLL Kit (Rear Sway Bar Only) E40-40-036-01-01
2017 to 2021
HONDA
Civic
Si Coupe
Rear Sway Bar is Tubular and 2 Way-Adjustable.
22mm
Note: Rear Sway Bar is Tubular and 2 Way-Adjustable.
$162.00
SPORTLINE Kit (Set of 4 Springs) E20-40-036-02-22
2017 to 2021
HONDA
Civic
Si Coupe
Rear Camber Kit part# 5.67476K is required for proper alignment. Tested with factory dampers.
1.5 in
1.7 in
Note: Rear Camber Kit part# 5.67476K is required for proper alignment. Tested with factory dampers.
$261.00

Sedan Products

Product Part # Front Rear MSRP Cart
ANTI-ROLL KIT - Front Adjustable End Link System AK41-40-036-04-FA
2017 to 2021
HONDA
Civic
Si Sedan
Replaces Factory End Links.
Note: Replaces Factory End Links.
$140.00
ANTI-ROLL KIT - Rear Adjustable End Link System AK41-40-036-04-RA
2017 to 2021
HONDA
Civic
Si Sedan
Replaces Factory End Links.
Note: Replaces Factory End Links.
$140.00
ANTI-ROLL KIT - Rear Anti-Roll Bar Brace AK41-40-036-05-RA
2017 to 2021
HONDA
Civic
Si Sedan
Rear Brace includes Rear End Link Kit.
Note: Rear Brace includes Rear End Link Kit.
$225.00
ANTI-ROLL-KIT (Front and Rear Sway Bars) E40-40-036-01-11
2017 to 2021
HONDA
Civic
Si Sedan
Front Sway Bar is Tubular and Non-Adjustable/ Rear Sway Bar is Solid and 2 Way-Adjustable.
29mm
22mm
Note: Front Sway Bar is Tubular and Non-Adjustable/ Rear Sway Bar is Solid and 2 Way-Adjustable.
$324.00
FRONT ANTI-ROLL Kit (Front Sway Bar Only) E40-40-036-01-10
2017 to 2021
HONDA
Civic
Si Sedan
Front Sway Bar is Tubular and Non-Adjustable.
29mm
Note: Front Sway Bar is Tubular and Non-Adjustable.
$180.00
PRO-ALIGNMENT 5.67476 Replacement Rod-End 5.6747019
2017 to 2021
HONDA
Civic
Si Sedan
Note:
$171.00
PRO-ALIGNMENT Camber Arm Kit 5.67476K
2017 to 2021
HONDA
Civic
Si Sedan
Camber Arm. Rear - Camber +3.0 to -3.0 degrees of Adjustments.
Note: Camber Arm. Rear - Camber +3.0 to -3.0 degrees of Adjustments.
$360.00
PRO-KIT Performance Springs (Set of 4 Springs) E10-40-036-02-22
2017 to 2021
HONDA
Civic
Si Sedan
Tested with factory dampers.
0.9 in
1.1 in
Note: Tested with factory dampers.
$261.00
PRO-SPACER Kit (10mm Pair) S90-6-10-012
2017 to 2021
HONDA
Civic
Si Sedan
Original studs must be changed. Longer studs are included.
Note: Original studs must be changed. Longer studs are included.
$99.00
PRO-SPACER Kit (15mm Pair) S90-6-15-038
2017 to 2021
HONDA
Civic
Si Sedan
Original studs must be changed. Longer studs are included.
Note: Original studs must be changed. Longer studs are included.
$103.00
PRO-SPACER Kit (20mm Pair) S90-6-20-015
2017 to 2021
HONDA
Civic
Si Sedan
Original studs must be changed. Longer studs are included.
Note: Original studs must be changed. Longer studs are included.
$110.00
PRO-SPACER Kit (30mm Pair) S90-4-30-027
2017 to 2021
HONDA
Civic
Si Sedan
Spacers can only be used with wheels that have cut-outs (facing the hub) to clear the stock studs. Please check as follows: Original stud length (i.e. 35mm) minus spacer-thickness (i.e. 25mm) = 10mm excess stud length. The cut-out should have a depth of 11mm.
Note: Spacers can only be used with wheels that have cut-outs (facing the hub) to clear the stock studs. Please check as follows: Original stud length (i.e. 35mm) minus spacer-thickness (i.e. 25mm) = 10mm excess stud length. The cut-out should have a depth of 11mm.
$133.00
REAR ANTI-ROLL Kit (Rear Sway Bar Only) E40-40-036-01-01
2017 to 2021
HONDA
Civic
Si Sedan
Rear Sway Bar is Tubular and 2 Way-Adjustable.
22mm
Note: Rear Sway Bar is Tubular and 2 Way-Adjustable.
$162.00
SPORTLINE Kit (Set of 4 Springs) E20-40-036-02-22
2017 to 2021
HONDA
Civic
Si Sedan
Rear Camber Kit part# 5.67476K is required for proper alignment. Tested with factory dampers.
1.7 in
1.8 in
Note: Rear Camber Kit part# 5.67476K is required for proper alignment. Tested with factory dampers.
$261.00

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