Sport Springs


SWIFT made Sport Springs
Let superior performance and comfort lower your car.

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. Swift did not develop the Sport Springs line by simply dropping the ride height. Unlike other manufacturers whose sole focus was style, Swift approached the creation of these lowering springs with 3 goals.

1. Maintain or improve a smooth, comfortable ride.
2. Increase handling by reducing body roll and squat in search of overall suspension balance.
3. Lower the vehicle within tolerance of each vehicle's usable stroke.

Every cars have their usable strokes

Most enthusiasts have had experiences with the typical harsh and uncomfortable ride from lowering springs. Performance is often overlooked by manufactures simply because it is easier to lower a vehicle for aesthetics. The end result is usually a bumpy ride that causes a decrease in traction, or excessive worn shocks caused by lowering the vehicle beyond the usable stroke.

Proprietary material and design to satisfy two contrasting factors

As you can imagine, keeping or improving the comfort level while increasing performance is not an easy task, especially since these two aspects contrast with each other.

Where most of the competition simply gave in to the easier method, Swift Springs decided to tackle this issue by creating our own material (H5S.TW), and unique manufacturing method that works very well for this material. Working in unison, the material and manufacturing method provides a superior level for both comfort and handling.

The way we design the lowering springs

We utilize spring design with fewer coils which not only allows us to decrease un-sprung mass but to also completely eliminate the chance of coil bind, while increasing the amount of usable stroke. Our proprietary material (H5S.TW) has a much quicker transient response, reacting to any road conditions which, in turn, cause a much smoother ride where other springs will skip on the harsh road surface, our spring will react to the road surface as needed.

With the Swift Sport Springs, we expect both street and circuit users to experience an increase in all aspects of suspension tuning from performance to comfort.

Bump Rubber

Suspension usable stroke for the cars now a day is very limited compared to before. To let the suspension do its own job efficiently, many car manufactures use bump rubber as a part of a suspension's functional part, not only to limit the shock stroke but to prevent the shocks from bottoming out. This scenario also applies to real world racing, and we use this as a primary focus when designing the sport springs.

Vehicle characteristics

Swift developed each Sport Springs application based on the individual vehicle's unique characteristic. Put simply, a luxury car will maintain its luxury ride, and sports car will maintain its sports car feel.

ACURA Code Year Part # Spring Rate Drop
Front Rear Front Rear
Kg/mm Kg/mm Inch Inch
NSX NA1 91+ 4H015 3.9 4.6 -0.8 -0.6

HONDA Code Year Part # Spring Rate Drop
Front Rear Front Rear
Kg/mm Kg/mm Inch Inch
ACCORD
(4 Cyl)
CG3 98-02 4H907 4.5 3.0 -1.2 -1.2
ACCORD
(6 Cyl)
CG1/2 98-02 4H908 4.8 3.0 -1.2 -1.2
CIVIC SI
(2door)
FG2 06-11 4H913 4.0 4.6 -1.2 -0.8
CIVIC SI
(4door)
FA5 -1.2 -1.0
CIVIC
(2, 4door)
Non SI -1.0 -0.8
S2000 AP1/2 00-06 4H007 4.6 6.0 -0.7 -1.0
FIT GD3 07-08 4H912 3.0 5.6 -1.2 -1.0
FIT GE8 09-14 4H021 2.3 2.1 -1.2 -1.0
FIT GK5 15+ 4H916 2.5 2.8 -1.0 -0.9
CR-Z ZF1 11+ 4H914 2.6 4.2 -1.2 -1.2

INFINITI Code Year Part # Spring Rate Drop
Front Rear Front Rear
Kg/mm Kg/mm Inch Inch
Q45 F50 02-06 4N010 2.3 5.5 -1.0 -0.4
G37 COUPE
(Q60)
CKV36 09-15 4N906 10.3 9.7 -1.3 -1.0
G37 X COUPE
(Q60 AWD)
CKNV36 09-15 4N911 7.5 7.8 -1.3 -1.0
G37 X SEDAN
(Q40 AWD)
NV36 08-15 4N907 8.0 7.4 -1.3 -1.0
G35/37 SEDAN
(Q40)
V36 07-15 4N908 10.0 9.0 -1.2 -0.8
Q50 RWD
(Red Sport Inc)
KV37 14+ 4N909 9.6 4.3 -1.0 -0.6
Q50 AWD
(Red Sport Inc)
NV37 14+ 4N910 8.0 4.2 -1.5 -1.4
Q60 RWD
(TBA)
Q60 AWD
(TBA)

LAMBORGHINI Code Year Part # Spring Rate Drop
Front Rear Front Rear
Kg/mm Kg/mm Inch Inch
GALLARDO LP550, 560, 570 10+ 4X918L 16.7 9.0 -1.7 -1.5

LEXUS Code Year Part # Spring Rate Drop
Front Rear Front Rear
Kg/mm Kg/mm Inch Inch
SC430 UZZ40 02-04 4T024 5.8 5.2 -0.8 -0.6
GS300
GS400
GS430
U(J)ZS160L 98-05 4T904 6.0 4.8 -1.0 -1.0
GS350
GS460
GRS191 07-12 4T051 4.3 4.7 -1.0 -0.8
GS350 GRL10 13+ 4T911 5.0 7.5 -0.8 -0.8
IS250
(RWD)
GSE20L 06-13 4T040 5.4 5.6 -0.8 -0.6
IS350
(RWD)
GSE21L -1.0 -0.8
ISF USE20L 08-11 4T906 9.0 8.0 -1.0 -0.6
ISF USE20L 12+ 4T910 9.7 8.3 -1.0 -0.6
IS GSE31 14+ 4T912 5.2 7.2 -1.1 -1.1

MAZDA Code Year Part # Spring Rate Drop
Front Rear Front Rear
Kg/mm Kg/mm Inch Inch
RX8 SE3P 04-11 4Z008 3.7 2.3 -0.8 -0.8

MITSUBISHI Code Year Part # Spring Rate Drop
Front Rear Front Rear
Kg/mm Kg/mm Inch Inch
LANCER EVO 8 / 9
(GSR)
CT9A 03-07 4M008 4.8 5.7 -1.4 -0.8
LANCER EVO 8 / 9
(MR)
CT9A 05-07 4M017 5.6
LANCER EVO X
(GSR, MR)
CZ4A 08+ 4M020 4.3 4.4 -1.0 -0.6
LANCER RALLY ART 09+ 4M904 4.1 3.6 -1.2 -1.0

NISSAN Code Year Part # Spring Rate Drop
Front Rear Front Rear
Kg/mm Kg/mm Inch Inch
GTR
(*1)
R35 09-10 4N017 15.0 7.0 -1.0 -1.0
GTR
(*1)
R35 15-16 4N912 9.0 4.5 -0.9 -0.8
*1 Use 4N017R for 2011-2014 models

PORSCHE Code Year Part # Spring Rate Drop
Front Rear Front Rear
Kg/mm Kg/mm Inch Inch
911 CARERRA
(Regular & S)
991 12+ 4X917L 3.6 7.7 -1.1 -1.1

SCION Code Year Part # Spring Rate Drop
Front Rear Front Rear
Kg/mm Kg/mm Inch Inch
TC ANT10L 05-10 4T905 3.3 5.2 -1.2 -1.4
XA NCP61L 04-06 4T029 3.0 2.6 -1.2 -0.8
XB NCP31L 04-06 4T008 2.4 2.8 -1.1 -0.8
FRS ZN6 13-16 4T909 3.0 4.5 -1.1 -1.0

SUBARU Code Year Part # Spring Rate Drop
Front Rear Front Rear
Kg/mm Kg/mm Inch Inch
IMPREZA WRX
(WAGON)
GGA 02-03 4F003 3.3 2.9 -1.2 -0.6
IMPREZA WRX
(SEDAN)
GDA GDB 02-03 4F005 3.3 2.7 -1.2 -0.6
IMPREZA WRX
(WAGON)
GGA 04-07 4F903 3.3 2.9 -1.2 -1.2
IMPREZA WRX
(SEDAN)
GDC GDD 04-07 4F901 3.4 2.7 -1.0 -0.8
IMPREZA WRX
(SED / WAG)
GE6 / GH6 08-10 4F909 4.0 3.8 -0.8 -0.7
IMPREZA WRX
(SED / WAG)
GE6 / GH6 11-14 4F907 4.5 4.2 -0.8 -0.8
IMPREZA WRX STI
(PCD 100)
GDF 04-07 4F902 4.5 4.0 -0.6 -0.4
IMPREZA WRX STI
(PCD 114.3)
GDFD 05-07 4F902 4.5 4.0 -0.8 -0.8
IMPREZA WRX STI
(SED / WAG)
GRB 08-10 4F907 4.5 4.2 -0.8 -0.8
LEGACY GT
(SEDAN)
BL6 05-09 4F008 4.3 6.6 -1.2 -1.0
LEGACY GT
(WAGON)
BP6 05-09 4F007 4.3 6.6 -1.2 -1.0
LEGACY 2.5GT BM9 10+ 4F910 3.4 4.0 -1.3 -1.1
FORESTER SG6 04-08 4F904 3.2 3.3 -1.6 -1.2
FORESTER SH6 09-13 4F908 3.8 3.6 -1.6 -1.6
FORESTER SJG 14+ 4F913 4.1 4.4 -1.5 -1.5
BRZ ZC6 13+ 4F912 3.8 4.5 -1.1 -1.0

TOYOTA Code Year Part # Spring Rate Drop
Front Rear Front Rear
Kg/mm Kg/mm Inch Inch
86 ZN6 17+ 4T909 3.0 4.5 -1.1 -1.0