Changed up my entire suspension, so everything is for sale! All parts were purchased new (except the Swift springs) and used on my 07 350z for < 1k miles (except the BC spring).

I had initially coverted the fronts to utilize a "regular" length coilovers spring (the Swifts) w/ the Diftech front upper mounts. This necessitated using the urethane spacers in the front, as the car sat too low to be functional. If you are interested in this, I will make a package deal for the ASTs w/ the Swift springs and Diftech mounts (front only or all 4).

All prices listed are OBO, cash if picked up. Will ship at buyer's expense (shipping & PayPal fees are additional), and only to a confirmed address. Will also discount for multiple items.

Selling the following:
1. AST 4100s - $650
2. Diftech Front/Rear Upper Mounts (will separate Front & Rear) - $400 all 4, $265 Fronts Only, $165 Rears Only
3. Swift Spring Pair - $80
4. Urethane Front Upper Spacer - $40
5. BC Racing Coilover Spring - $25


AST 4100 Coilovers. These are designed to work with factory upper mounts, but you will need to drill out the center of the fronts. Included spring rates are 12k/10k front/rear. They are single-adustable, rebound only. The front adjusters are on the top of the shaft and are secured via an allen set screw. Rear adjusters are at the bottom of the shock just above the fork Everything pictured is included:

• AST Coilovers
• OEM Upper Mounts, Front & Rear (both Shock & Spring Mounts)
• Front AST Springs, 12k
• Front AST Upper Spring Mounts (black plastic "cone" pieces)
• Rear AST Spring Height Adjuster
• Rear Rana Springs, 10k

Diftech (www.diftech.com) Front/Rear Upper Pillowball Mounts. Purchased new from Diftech. The mounts are designed to be useable w/ different coilover brands, you just need to purchase an "install kit" to get the right size inserts for the pillowball. You can reach out to Diftech for specifics. The included install kit works for the AST 4100s only, AFAIK. And I am, of course, missing one of the upper parts of the adapter kit. Fronts have longer studs installed to use the 40mm urethane spacers, and can either be replaced with the Diftech studs (in the plastic bag) or simply cut the longer studs.






Swift Linear Coilover Springs: Purchased used, this is a pair of Swift springs. They are 7" long, 2.25"/6mm ID, and are 650 lb-in.








Ebay 40mm Front Upper Strut Spacers. Purchased new off Ebay, barely used. Perfect if you need to get your front end higher.





BC Racing Coilover Spring. Brand new, never used. Was included with a set of coilovers by mistake (I purchased Swift springs all around).