Proma Star Double Adjustable Coil-Over Shocks

Custom Mount Coil-Over Shock Absorbers

QA1’s double adjustable shocks have 324 valving options, with 18 positions of compression adjustment and 18 positions of rebound adjustment. There are no jumps when adjusting between any two clicks. Each adjustment has been carefully defined to provide the ideal force curve to maximize performance.

  • Independent 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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Proma Star Shock - Bearing - QA1 SuspensionProma Star Shock - Bearing - QA1 Suspension
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  • Proma Star Shock - Bearing - QA1 Suspension
  • Proma Star Shock - Bushing - QA1 Suspension
Part Number Name Mounting Recommended Ride Height Spring Length Compressed Height Extended Height Price Qty
DD702 Proma Star Double Adjustable Poly 14 13 19.5
$305.23
DD601 Proma Star Double Adjustable Bearing 14 12.625 18.75
$305.23
DD404 Proma Star Double Adjustable Poly 10 11.125 15
$305.23
DD401 Proma Star Double Adjustable Bearing 9 10.125 14
$305.23
DD302 Proma Star Double Adjustable Poly 7 8.75 11.125
$305.23
DD901 Proma Star Double Adjustable Bearing 14 15 23.625
$305.23
DD602 Proma Star Double Adjustable Poly 14 12.625 18.75
$305.23
DD501 Proma Star Double Adjustable Bearing 12 11.625 16.875
$305.23
DD402 Proma Star Double Adjustable Poly 9 10.125 14
$305.23
DD303 Proma Star Double Adjustable Bearing 7 / 8 / 9 9.5 12.75
$305.23
DD902 Proma Star Double Adjustable Poly 14 15 23.625
$305.23
DD701 Proma Star Double Adjustable Bearing 14 13 19.5
$305.23
DD502 Proma Star Double Adjustable Poly 12 11.625 16.875
$305.23
DD403 Proma Star Double Adjustable Bearing 10 11.125 15
$305.23
DD304 Proma Star Double Adjustable Poly 7 / 8 / 9 9.5 12.75
$305.23
DD301 Proma Star Double Adjustable Bearing 7 8.75 11.125
$305.23
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