Sorry, 1973 240z. 

https://www.thezstore.com/page/TZS/PROD/23-6000

 

That's a brand new thing.  Looks like somebody at MSA came up with it.  You raise a good point about the rubber.   It looks like the part you have will dramatically increase travel before bottoming out.  Not sure it's meant for just a one or two inch lowering.  Too bad they didn't add adjustability.

You're kind of on your own.  No offense but I'm not seeing a big benefit to that part.  I've not seen many people at all complaining about bottoming out after using lowering springs.  To be blunt, I'd return them if you can.  I think that they're meant for the "slammed" cars, not Eibach lowering springs.  I'm surprised that MSA advertises them the way they do.  Kind of worrisome.  People don't really have that problem.  

Edited May 22, 20195 yr by Zed Head

3 hours ago, Blitzed said:

Concern, the original rubber insulator, not used on this set-up, the new spring seat mount and strut mount are metal on metal. Noise, vibration, banging or other? Would a thin piece of rubber between the two help?

This part of their ad copy suggests that you'll get more road noise.  They must have tried it on one of their own cars.

Disappointing.  It's a solution to a problem that people just don't have.  Pretty expensive too.

"Note:
This kit will increase feedback felt through the suspension, and may increase road noise and vibration a bit (almost all suspension upgrades do to a degree). Based on overall design and quality of the pieces, we do not think it will be all that significant for most Z-Car owners. "

^ Agree, the rubber of the original insulator is not very compress-able, it's really there for vibration control.  Can't see how the new unit is going to improve handling or anything for that matter.  A thin disc of polyurethane will hold up better than thin rubber but won't help the vibration much.

I’ve considered new strut rubber mounts solely for the reason of NVH. After years of abuse I would think the rubber gets work hardened and brittle and does not absorb the road noise as well. How much can we ask from 45 year old rubber parts ? 

One reason I have NOT gone the coil over design is because of the pillow mount which eliminates the rubber cushion . These cars ride harsh enough with stiffer springs and shocks , then connect everything without rubber - eek.

I guess it depends on your usage . I’m looking for more refinement in my ride and still have it sporty . I’ve considered new strut mounts to help with this. As far as OEM vs aftermarket , a 100$ difference for 4 items I can do . Ideally I’d like adjustable Koni and all new rubber with my ST Springs . 

Camber can be achieved by slotting the mounting holes for the insulators , but some might not feel comfortable with that. 

 

2 hours ago, madkaw said:

Ideally I’d like adjustable Koni and all new rubber with my ST Springs . 

 

17 hours ago, Terrapin Z said:

My site says $64.21 each for the shorter 240, early 260, and 280 Front.

I'm thinking of all new suspension rubber, strut bearings and the Koni's with stock springs. Found the OEM insulators for the $64.21 on Amazon with free shipping which makes the price difference from after market only about $40!

https://www.amazon.com/1970-1978-Nissan-Front-Insulator-54320-E4100/dp/B00TNL7LTK