SF Racing Coilovers Compared
SF Racing is the biggest brand on Lower HQ, with about 3,800 kits across Sport, Track, N2 and Air Struts. We went through every listing to compare what actually changes between the four lines. Here is what the data shows.
| Sport | Track | N2 | Air Struts | |
|---|---|---|---|---|
| Built for | Street and daily driving | Track days, still usable on the street | Serious track use and fine tuning | Low when parked, lifts for driveways |
| Damping adjustment | 1-way, 32 clicks (rebound and compression together) | 1-way, 32 clicks, firmer track valving | 2-way: rebound and compression adjusted separately | 1-way |
| Damper | Monotube | Monotube | External reservoir design | Air strut with damper |
| Common damper sizes (front / rear) | 52 / 46 mm, 52 / 50 mm or 50 / 50 mm | Same as Sport | Same sizes as Sport | Same sizes as Sport |
| Spring rates | Varies by car; middle of the range about 9.7 kg/mm front | Same as Sport on 1,315 of 1,317 cars we checked | Varies by car, about 5 to 20 kg/mm front | Air springs, height set by pressure |
| Top mounts | Aluminum with rubber bushings; camber plates optional on many cars | Hardened rubber; pillowball optional on some cars | Aluminum with rubber bushings; camber plates optional on many cars | Aluminum with rubber bushings |
| Extra parts needed | None for the kit itself | None for the kit itself | None for the kit itself | Air management: compressor, tank, valves and controller, unless included |
| Typical price here | $995 (from $695) | $1,095 to $1,195 | $1,795 to $1,895 | $1,795 to $1,895 |
Data from the spec tables on the SF Racing listings on Lower HQ, checked October 2026. Specs vary by car, so always check the table on the product page for yours.
Sport vs Track: what is really different?
On paper, very little. For 1,315 of the 1,317 cars where we list both, the Sport and Track kits have the same spring rates, and they share the same damper sizes and 32-click adjustment. The difference SF Racing describes is the valving inside the dampers: Track kits are valved firmer for track use, and use hardened rubber top mounts, with pillowball mounts as an option on some cars. If you mostly drive on the street, the Sport kit is the better fit. If you do regular track days, the Track kit costs about $100 more.
When N2 is worth it
N2 kits let you adjust rebound and compression separately, and use external reservoirs that hold more oil and stay consistent when the dampers get hot. That matters on track, where you want to tune how the car settles after a bump separately from how it reacts to one. For a street car, the extra cost is hard to justify.
When Air Struts make sense
Choose air if you want the car on the ground at a show and at a normal height for driveways and speed bumps. Remember to budget for air management, since most listings do not include it.
Frequently asked questions
Can I use SF Racing Track coilovers on the street?
Yes. They are firmer than Sport kits but are designed to stay usable on the street.
Can I change the spring rates?
Many SF Racing listings offer a choice of spring rates on the product page. Our spring rate calculator can help you pick.
Which kit fits my car?
Every SF Racing title lists the model, years and chassis code. Use which suspension do I need? to narrow it down, or contact us and we will check fitment with the supplier.