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Diftech Upper Shock Mounts FRONT - Coilover Top Hats for Nissan 350Z Z33

SKU. 1G001    Part No. 10618-10  

Main photo of Pillowball Mounts by Diftech 10618-10 Upper Shock Mounts FRONT - Coilover Top Hats for Nissan 350Z Z33

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List Price: $355.00

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Usually ships in 1-2 days

All parts sold on this site are Competition Parts intended for Racing and Off-Road use only.
⚠ WARNING: This product can expose you to chemicals including arsenic, which is known to the State of California to cause cancer. For more information, go to
  • Overview

    Quick Info

    • 6061-T6 Aluminum Alloy

    • Anodized Black Finish

    • Made in The USA

    Product Details

    Upper Shock Mounts FRONT - Coilover Top Hats for Nissan 350Z Z33 for Penske 8300

    • Fits Nissan 350Z Z33 chassis
    • Fits Penske 8300 coilovers 
    • Uses Penske spring retainer
    • Coaxial design for increased traction and reduced shock blind
    • Hat movement is independent of spring compression axis
    • Increase compression stroke by 1in (26mm) compared to stock
    • 6061-T6 aerospace aluminum alloy for extra rigidity and reduced weight
    • FK large 3/4" high-quality spherical bearings
    • Install kit required (available for each shock brand)
    • Custom install kit available (email us for your custom application)
    • Anodized black finish for durability
    • Engineered, tested, and manufactured in the United States

    These extended front top hats are designed to convert to a true coaxial setup and will add additional compression stroke to the shock. The top hat design allows the shock shaft to be tucked higher into the body of the car allowing the shock body to also tuck an additional 1.0in or 26mm more than normal. This results in more shock travel before bottoming out and will increase suspension compliance and traction. The spherical bearing upper mount also eliminates bushing compliance of stock mounts and gives greater control to dampers under high racing loads.

    Non-coaxial upper mounts, while very economical for production and fine for street use, leave a lot of available suspension performance on the table. This can be vastly improved by going to a true coaxial setup that separates the upper mount and spring perch. Non-coaxial upper spring location induces bind in the shock shaft increasing friction on the shock piston and also forces the spring to have nonlinear compression rate. Increased friction leads to higher shock oil temperature, additional wear in pistons and seals, and greatly reduces traction at the wheel. This kit will convert the non-coaxial top hats that come with most coilover suspension kits to a true coaxial set-up.

    Not designed for use with stock or stock-type springs. Diftech install kit included to mount up your high-performance Penske 8300 kit. Springs not included. 

    Made in the USA from 6061 billet aluminum. All Diftech upper mounts use high strength FK wide-series bearings with Teflon liners for maintenance free, quiet operation.

  • Specifications +
    Brand Diftech
    Part Number 10618-10
    GTIN 617395688715
    Category Vehicle Parts ▸
    Suspension & Steering ▸
    Shock Mounts ▸
    Pillowball Mounts
    Item Code 1G001
    Length 0.0 in.
    Width 0.0 in.
    Height 0.0 in.
    Weight 0.00 lb.
    Created Friday, November 9, 2018
    Last Updated Friday, December 21, 2018
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