
We get plenty of questions regarding our D1 Spec Coilovers simply because people are not aware of the small details that make our suspension unique. The primary goal was to design a coilover system to meet the demanding needs of professional drivers, but yet still suitable for street drifters in Japan. With this in mind, many different drivers provided input on what they desired…
Features at a glance:
32 way adjustable dampers
Inverted monotube for front, standard monotube for rear
Camber adjustable pillowball top mount in the front
Camber adjustment on front lower bracket
Easy-to-read, built-in height gauge for the rear.
Let’s look at individual details in depth….


Above, you will see a close up of the front lower bracket. The top picture shows the bracket without any of the supplied hardware. Notice how the upper spindle bolt opening is notched out. This is to allow for camber adjustment from the lower bracket. Camber is adjusted by positioning the silver square adjustment washer on the second picture (in the large red circle). If you look closely, the opening for the bolt is slightly off center. So to adjust camber, you just have to either place the washer in the neutral position, or the “in” position to get more negative camber and to also get a little bit extra clearance for high offset and/or wide wheels.
We also provide spindle bolt washers (in the smaller red circle on the second picture). For 4-lug 240sx’s, the OEM spindle bolt is 12mm, where as the OEM spindle bolt for 5-lug 240sx’s are 14mm. When 240sx owners perform a 5-lug swap, they will encounter this small but critical problem of not being able to re-use their spindle bolts. We have solved this problem by providing 12mm-14mm adapters, so that you can get your car back on the road without sourcing extra parts or modifying your lower coilover bracket.

A camber adjustable pillowball upper mount is almost a standard for a coilover designed for drifting. As most of you know, this upper mount reduces the slop found in the OEM rubber upper mount, and also provides the extra benefit of being able to adjust camber easily. Combined with the extra camber adjustment of our lower bracket, you could possibly join the “oni-kyan” club (demon camber)

Here, we can see the entire front assembly. From rigorous testing from D1 drivers, we have opted to use the more versatile monotube damper. Monotube dampers offer superior handling characteristics for a wider range of stroke versus the more common twin-tube structures. The difference of dampening is night and day, and can only really be experienced in person. Coupled with 32-way adjustments, the dampening can be set softer to almost stock levels, or all the way to hardcore track level stiffness.

On the lower bracket for the rear coilover, we have a special cut-out so that you can visually see your height adjustments, making track-side adjustments soooo much easier and quicker.
Furthermore, the rear assembly is made of aluminum to reduce overall weight.


We also provide a spindle spacer adapter for the rear coilover also. Due to varying clearance issues on the backside of the rear spindle, we included a spacer to provide extra clearance. On the second picture, notice that this unknown coilover’s lower bracket is almost resting on the spindle. This issue is resolved by installing our provided spacer between the coilover and the spindle.

Finally, we finish up with a feature article from DoriTen. Our driver Nakamura Naoki uses the D Max coilover without any modifications. No swapping of spring rates or anything. You will also notice the shock dynos and what settings Nakamura-san uses during the D1 competition at Sekia Hills.