Proma Star Single Adjustable Coil-Over Shocks

Custom Mount Coil-Over Shock Absorbers

With QA1’s Proma Star single adjustable coil-over shock, you can easily adjust your compression and rebound valving and get the hard-core performance you need. One knob allows you to choose from 18 valving options that adjust both compression and rebound valving simultaneously, allowing total suspension control in one easy-to-reach location.

  • Simultaneous Compression and Rebound Adjustment
  • Coil-Over
  • Lightweight Aluminum
  • Ride Height Adjustable
  • Spring Mounting Hardware Included
  • 100% Dyno Tested and Serialized
  • Revalveable and Rebuildable by the QA1 Factory or QA1 Authorized Service Centers
  • American Made
  • Precision Machined Aluminum Piston with PTFE Piston Band
  • 5/8” Centerless Ground, Hard Chrome Plated, Solid Piston Rod
  • Three Step Sealing System

Installation guide for Proma Star Shocks

SPRING RATE CHARTS
The charts below are a general guideline for selecting spring rates. Spring rates may vary depending on applications, usage and personal preference.

AXLE WEIGHT IN LBS.
Axle Type Spring Length 900-1099
1100-1249
1250-1449
1450-1599
1600-1899
1900+
Solid Rear Axle
8"
200
225
300 350 400 450
  9" or 10" 175 200 225 250 275 350
  12" 105 130 170 225 250 300
  14" 95 125 150 175 225 275
Independent Suspension 7" 350 450 550 600 650 Call
  8" (Chrome) 300 400 450 500 600 Call
  9" 220 300 350 450 550 650
  10" 200 250 300 400 450 550
  12" 150 200 250 300 400 450
 Jaguar (IRS)
10" 115 140 200 250 250 275
Corvette (IRS)
Ahead of Axle
10" 200 225 275 350 400 500
Corvette (IRS)
Behind Axle
12"
95 125 150 225 275 300

AVERAGE VEHICLE WEIGHT
Not sure what your vehicle weighs? See our detailed Spring Rate Chart for general guidelines on determining the approximate weight of popular vehicles.

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Part Number Name Mounting Recommended Ride Height Spring Length Compressed Height Extended Height Price Qty
DS404 Proma Star Single Adjustable Poly 10 11.125 15
$206.85
DS401 Proma Star Single Adjustable Bearing 9 10.125 14
$206.85
DS302 Proma Star Single Adjustable Poly 7 8.75 11.125
$206.85
DS901 Proma Star Single Adjustable Bearing 14 15 23.625
$206.85
DS602 Proma Star Single Adjustable Poly 14 12.625 18.75
$206.85
DS501 Proma Star Single Adjustable Bearing 12 11.625 16.875
$206.85
DS402 Proma Star Single Adjustable Poly 9 10.125 14
$206.85
DS303 Proma Star Single Adjustable Bearing 7 / 9 9.5 12.625
$206.85
DS902 Proma Star Single Adjustable Poly 14 15 23.625
$206.85
DS701 Proma Star Single Adjustable Bearing 14 13 19.5
$206.85
DS502 Proma Star Single Adjustable Poly 12 11.625 16.875
$206.85
DS403 Proma Star Single Adjustable Bearing 10 11.125 15
$206.85
DS304 Proma Star Single Adjustable Poly 7 / 8 / 9 9.5 12.75
$206.85
DS301 Proma Star Single Adjustable Bearing 7 8.75 11.125
$206.85
DS702 Proma Star Single Adjustable Poly 14 13 19.5
$206.85
DS601 Proma Star Single Adjustable Bearing 14 12.625 18.75
$206.85
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