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Insulated Spring Seat & Strut Mount Set, 70-78 240Z-260Z-280Z

Insulated Spring Seat & Strut Mount Set, 70-78 240Z-260Z-280Z
You can choose a Z-Car from your garage, or from the selections above, to filter the store or check part fitment.
Part #:23-4187
Price: $377.00
Planning a high performance street, track, or race build? See 23-6000 in Related Items for the Pillow Ball version of this upgrade!

A long sought-after solution to the most common issue that comes with lowering your Z-Car using lowering springs is now available! This kit includes components to cover one pair of struts: two insulated strut mounts; two upper spring seats; and all the required installation hardware. Read on below for more details!

If you have lowered your car with lowering springs (like our Eibach Performance Springs), and are using an aftermarket bump stop (such as our urethane bump stops, 23-4196), you may have noticed that your car bottoms out easier while driving aggressively under some road conditions. This kit properly solves the problem of the lost suspension travel without sacrificing the lowered ride height by raising the bump stop position inside the spring seat. By doing this, the struts will be able to utilize most of their intended travel, which can prolong the life of the cartridges.

Not only does the kit replace the stock spring seats; it also changes to a unique type of fixed camber plate type strut mount that features a bushing in the center. This type of upper strut mount has been used for years to greatly reduce deflection inherent to standard rubber insulators without the harshness of completely solid versions. Other benefits of this design range from improved tire grip and general handling to more accurate wheel alignment, which further improves handling and prolongs the life of your tires as well! The kit also replaces the bulky, expensive factory strut bearings for the front suspension and entirely removes the rear strut spacers (removing these components is what allows the increased suspension travel).

This kit will slightly 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 think it will be mostly insignificant for the majority of Z-Car owners.

9/74-78 Z-Cars:
This kit will lower the rear of late 260Z's and 280Z's by about 3/4".

Model Guide:
Datsun 240Z, 260Z, 280Z

Code Guide:
Datsun S30

Year Guide:
1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978

Some parts may not fit every version of every year listed. See product Title & Description for any application breakdowns or customization options, and contact us with any questions.

  • 1970 Datsun 240Z
  • 1971 Datsun 240Z
  • 1972 Datsun 240Z
  • 1973 Datsun 240Z
  • 1974 Datsun 260Z
  • 1975 Datsun 280Z
  • 1976 Datsun 280Z
  • 1977 Datsun 280Z
  • 1978 Datsun 280Z
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