Spring Plates-911/930 ASP Adjustable Spring Plate Kit (1 Set) 1969-89 911/912 1975-1988 930

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More Grip, Better Tire Contact Patch

Updates the rear suspension camber curve to meet the needs of modern, wide, low-profile radial tires. The result is superior grip in turns, superior grip in straight-line braking, reduced tire wear. Excellent for both street and track.

  • • Improved contact patch in turns
  • • Improved contact patch for straight-line braking
  • • Go street-to-track with one camber setting
  • • Reduced tire wear
  • • Reduced camber thrust/rolling resistance

ASP Makes The Tire Gain Camber Faster. 

As the suspension compresses in turns, countering the effects of body roll and matching the needs of modern radial tires. The tire remains square with the road surface and the contact patch is improved. Grip increases.

With the ASP '69-'89 911s can now achieve modern suspension performance.


ASP with QuickChange Splined Hub and PolyBronze

ASP Adjuster

ASP double-adjuster detail

ASP Animation

ASP Kinematics

Easy To Setup Toe And Camber Independantly.

Replaces the troublesome stock eccentric adjusters with simple double-adjusters.

ASP allows adjustment with vehicle weight resting on the tires making it easy to read a camber / toe gauge while turning the adjusters. Quick changes can be made trackside even if a camber gauge is not available.

  • • Upper and lower double-adjusters
  • • Rotate same direction to set toe
  • • Rotate opposite direction to set static camber

Replaces stock '69-'89 on 911 and 1975-87 on 930 spring plate blade and spring plate cover. Bolt on - no welding required, works with torsion bars or coilovers. Use with any standard size bushing - not included - PolyBronze recommended. Requires the splined hub portion from a set of factory adjustable spring plates or the QuickChange Spring Plate splined hub. Download instructions for more information.Note - Some images show the ASP Pictured with optionally available QuickChange Splined Hub and PolyBronze Bearings. Trailing arm is not included and is shown for reference only