Yes I know there is a "Stagea Suspension" thread, but it is pretty cluttered and we haven't really explored a lot of M35 suspension kit options out there, so I thought I would put together a bit of a list with some basic info and links to websites for those of us without suspension upgrades.
This is not a complete list by any means, but should serve to give M35 owners a few options.
Silk Road “RA-1”
Adjustable: F -20 to -90mm, R -15 to -65mm
Spring rates: F 16kg/mm, R 10kg/mm
Non AR-x
RRP: 165,900yen
Website: Silk Road
Freeway-Dolphin (Ohlins)
Adjustable: unknown
Spring Rates: F 9km/mm, R 8kg/mm
AR-X not specified – also available in 2WD
RRP: 344,400yen
Website: Dolphin
Bilstein “BTS”
Adjustable: No. Front /Rear -40mm
Spring rates:
AR-X #BTSA162
RS/RX/Axis #BTSA163
RRP: 168,000yen
Website: Bilstein
NM35 Bilstein Dampers (RS/RX/Axis)
Front part # - Left BE5-A100, Right BE5-A101
Rear part # BE5-A152
Cusco “Zero 1 and Zero 2”
Adjustable: F -10 to -65mm, R -10 to -65mm
Spring rates: Made to order
AR-X not specified
RRP: Zero 1- 153,300yen
Zero 2- 186,900yen
Website: Cusco
HKS “Hipermax LS+”
Adjustable: F 0 to -58mm, R 0 to -42mm
Spring rates: F 10kg/mm, R 6.8kg/mm
AR_X not specified
RRP: 192,150yen
Website: HKS Hipermax
Insurance Group “G-Line”
Adjustable: F -20 to -95mm, R -15 to -65mm
Spring rates: F 16kg/mm, R 10kg/mm
AR-X adaptable
RRP: 208,950yen
Website: G-Line
RS-R “Best*i” and “Basic*i”
Adjustable: F 0 to -55mm, R 0 to -55mm
Spring rates:
AR-X available
RRP: 115,000yen
Website: RS-R
Nismo “S-Tune”
Non adjustable
Spring rate: F 8.3kg/mm, R 9.2kg/mm
Non AR-X – Also available in 2WD
RRP: 96,780yen
Website: Nismo S-tune
Tein “GT Wagon”
Adjustable: F 0 to -55mm, R 0 to -55mm
Spring rate: F 10kg/mm, R 11kg/mm
Non AR-X
RRP: 104,457yen
Website: Tein
Tein “Super Wagon”
Adjustable:F 0 to -55mm, R 0 to -55mm
Spring rate: F 6kg/mm, R 7.2kg/mm
AR-X not specified
RRP: 132,300yen
Part# DSP00-91AS3
Website: Tein
Aragosta “ERS”
Adjustable: F 0 to -65mm, R 0 to -58mm
Spring rate: F 11.6kg/mm, R 9kg/mm
AR-X not specified
RRP: 346,500yen
Website: Aragosta
Takero’s
Adjustable: F -20 to -48mm, R -20 to -48mm
Spring rate:
Non AR-X
RRP: 346,500
Website: Takero's
Kenstyle
Adjustable: F +20 to -22mm, R +14 to -15mm
Spring rate: F&R 5.4kg/mm
Non AR-X
RRP: 139,650yen
Website: Kenstyle
Absolute “DS”
Adjustable: Made to order
Spring rate: Made to order + camber adjustment
AR-X not specified
RRP: ~235,000yen
Website: ???
JIC Magic “Profit FLT-TAR”
Adjustable: F +10 to -30mm, R +10 to -30mm
Spring rate: F 8kg/mm, R 8.2kg/mm
Non AR-X
RRP: 152,250yen
Website: JIC
MASA “M-Tune”
Adjustable:
Spring rates: F 10kg/mm, R 10kg/mm
Non AR-X
RRP: 281,400yen
Website: MASA
KYB “Lowfer Sports”
Non-adjustable: F -21mm, R -25mm
Spring rate: multiple selectable springs
Non AR-X
RRP: 52,920yen
Website: KYB
AiStar “A-Spec”
Adjustable: F -5 to -55mm, R -5 to -55mm
Spring rate: F 8kg/mm, R 7kg/mm
Non AR-X
RRP: 106,870yen
Website: ???