Spring and Strut Replacement – Koni/AGX/Hypercoils – 1993 NX2000

A Treatise on Building and Installing Custom Suspension:

It’s not easy.


Install fully new suspension encompassing new springs and struts which lower the car approximately one-inch from its stock ride height. Do this without compromising safety and performance while maintaining daily driveability.


  • 2x Koni Yellow B15 Sentra front adjustable strut inserts
  • 2x KYB AGX rear adjustable gas struts
  • 4x Hyperco Hypercoil Generation 2 lowering springs
  • Reuse stock front strut housings
  • Reuse all top hats and mounting bushings etc.
  • 2x bicycle headset spacers


  1. Remove front struts and springs and disassemble
  2. Cut housings, drill out bottoms, and remove “blood n’ guts” to insert the Koni struts
  3. Modify Koni strut bottoms to clear CV boots, insert and reassemble with new springs
  4. Rear is the same as the front, only the rear struts are a direct replacement
Look at those tight coils (old vs. new)

Front bumpstop (cut 50%), boot and top hat.

Stock front SensaTracs

This is easy compared to getting the compressor tool in between the rings on the Hypercoils. BTW the pressure the springs are under in this maneuver is astronomical.

Exceptionally manly moment about to ensue.

So pretty. Not their prescribed purpose – these are for a 2000 Sentra really.

The contents of two Monroe SensaTrac struts. Don’t breathe this.

Slicin’ / Dicin’

This is the rear assembled (these were WAY easier than hollowing out the fronts)

The two rears assembled
My axle fell apart during this and had to be replaced. That is not typical. The upside of this is a shimmy on the highway appears to have departed with the bad axle. The strut spindle (center) in the front did not bolt to the stock top hats as expected, there was approximately 1.5-2.5cm of space that needed to be filled. I used approximately 9qty. 1/2″ interior diameter washers to fill this gap. Getting the Konis into the housings was quite a battle – my fronts were not original though and were Monroe Sensatracs. I cut the stock bumpstops by about 50% and reused those and the boots on both ends of the car.
Hard to see from this angle, but the drop is very minimal which is good. Can’t be scraping around LA.
Performance is excellent. I’ve ridden on Ground Control coilovers with AGXes in the past on a Nissan NX2000 and this is WORLDS better than that. I’ve also had Tein SS coilovers on a P11 Infiniti G20 which was bone jarring compared to this. So far, this setup is excellent.