| 350Z kit | Manufacturer-listed year range | Rear layout | Published adjustment and spring details |
|---|---|---|---|
| KSport Kontrol Pro · CNS260-KP | 2003–2008 | True rear coilover | 36 damping levels, one knob per damper; 12 kg/mm front and 6.3 kg/mm rear; adjustable lower mount. |
| BC Racing BR · D-17-BR-RS | 2002–2009 (RWD) | BC identifies a true rear coilover for the 2003–2008 350Z application in its BR replacement-part fitment listing; verify the exact selected kit. | 30 simultaneous compression/rebound clicks; standard listed spring rates 9 kg/mm front and 8 kg/mm rear. |
| Megan Racing EZ II · MR-CDK-N3Z-EZII | 2003–2009 | Not stated on the cited product page. | Monotube; 10 kg/mm front and 8 kg/mm rear. The page does not state damping adjustment. |
| Godspeed MonoSS · MSS0270-A | 2003–2009 | Listed as true coilover rear. | MonoSS listings show 16-level damping adjustment; the cited 350Z fitment entry does not give a spring rate. |
The shared model name does not guarantee the same fitment. The KSport page lists 2003–2008; BC, Megan and Godspeed publish wider ranges. Confirm year, body style, trim and any listed exclusions on the exact product page. Click counts, spring rates and rear layouts describe different parts of a setup; they do not create a direct performance ranking.
What the rear layout changes
A true rear coilover is a combined spring-and-damper assembly at the rear rather than separate rear components. The KSport CNS260-KP and Godspeed MSS0270-A listings mark their 350Z applications as true rear coilover. BC’s manufacturer parts listing describes its 2003–2008 BR rear application that way. Megan’s linked EZ II product listing does not state the rear layout, so verify it before comparing installation or adjustment steps.
Do not assume a true-rear layout from a brand or series name alone. Check the product number, vehicle-specific instructions and included hardware.
Compare the full setup, not one number
A damping adjuster count is not a standardized performance score. Likewise, front and rear spring rates are application-specific values, not a comfort rating. Before choosing, compare the exact kit instructions, included mounts, available replacement parts, alignment requirements and current checkout total for your vehicle.
This page does not rank the brands by price or comfort: prices and selected options change, and the manufacturers do not provide a controlled, same-car comparison. Start with the fitment range and features that are documented for the exact 350Z application.
Manufacturer references
Specifications above are transcribed from the linked manufacturer product or series pages. Where an exact application detail is absent from the cited page, it is called out rather than assumed. Check the current listing and installation instructions before purchase.
Frequently asked questions
What model years are listed for all four examples?
The published ranges overlap for 2003–2008: KSport lists 2003–2008, BC Racing lists 2002–2009, and Megan Racing and Godspeed list 2003–2009. This overlap is not a substitute for checking the exact trim, body style and product number.
Which of these 350Z kits are listed as true rear coilovers?
KSport lists the CNS260-KP as a true rear coilover, and Godspeed lists the MSS0270-A as true coilover rear. BC Racing’s BR parts fitment listing identifies the 2003–2008 350Z rear application as a true coilover. The cited Megan EZ II product page does not state its rear layout; confirm it with Megan or the retailer.
Can I compare the damping click counts directly?
The counts describe each manufacturer’s adjustment system, not a common performance scale. KSport lists 36 levels, BC Racing lists 30 simultaneous compression/rebound clicks for BR, and Godspeed’s MonoSS series lists 16 levels. The cited Megan EZ II product page does not publish a damping-adjuster count.
Does a higher spring rate or more damping clicks mean a better kit?
No. Spring rates and adjuster designs are application-specific specifications, and the cited manufacturer pages do not provide a controlled comparison that ranks these kits. Match the exact vehicle, intended setup and instructions, then ask about any detail the product page does not state.
Which one is the cheapest?
This page does not publish a price ranking. Check current checkout pricing for the exact kit and options, and compare the same vehicle configuration and included components.