8610/8611 Series

 
The 8611 series double adjustable strut insert is a twin-tube hydraulic that is externally adjustable in both rebound and compression damping. This is an affordable double adjustable option for club racers and autocrossers in North America for vehicles utilizing strut suspensions.

The rebound adjustable is adjustable at the top of the strut rod with a knob that is included while the compression adjuster is located at the bottom of the insert. This requires a 1/2" diameter hole to be made in the bottom of the strut housing for access to the adjuster.

The 8611 series is not supplied with a threaded locknut to retain the insert into the strut housing. If new locknuts are required for your application, please refer to the chart below to determine which part number you need when placing your order.

The 8611-1262 RACE insert is designed to work with higher spring rate applications and heavier vehicles.
 

How To Adjust
8610 Series
The 8610 series strut cartridge insert fits a variety of road racing and autocross cars. This insert offers externally adjustable rebound damping with unique valving characteristics that have been developed in conjunction with many top racing teams and chassis builders as a single adjustable alternative to the 8611 series. The dampers are supplied with an adapter to fit through a 5/8" bearing/camber plate assembly.

 

How To Adjust
Technical Information
To determine the correct 8611 or 8610 insert for your application, follow these steps.

Measure the inside depth and inside diameter of your strut housing.

For the KONI insert to be properly installed, the measure depth of your strut housing must be 1-4mm (.04"-.16") shorter than the dimension "A" in the chart below. Also, the inner diameter of the housing must be larger than the dimension "D."

In the event that the KONI "A" length is shorter than the required, the user must then fabricate a spacer and place it under the KONI insert so as to achieve the proper depth relationship.

After the KONI insert with the correct "A" length has been determined, verify that the stroke length will be appropriate for your application.

 
Imperial Series
Part 
Number
Stroke Max 
L
Min 
L
A D
8611-1256 Race 5.47" 20.47" 15.00" 12.24" 1.79"
8611-1257 Race 5.63" 19.69" 14.06" 11.42" 1.71"
8611-1258 Race 6.22" 24.21" 17.99" 15.39" 1.71"
8611-1259 Race 6.02" 21.26" 15.24" 13.07" 1.71"
8611-1262 Race 6.02" 21.26" 15.24" 13.07" 1.71"
 
Part Number Stroke Max L Min L A D
8610-1436 Race 5.63" 19.69" 14.06" 11.42" 1.71"
8610-1437 Race 6.02" 21.26" 15.24" 13.07" 1.71"
  Metric Series
Part 
Number
Stroke Max 
L
Min 
L
A
mm
D
mm
8611-1256 Race 139 520 381 311 45.5
8611-1257 Race 143 500 357 290 43.5
8611-1258 Race 158 615 457 391 43.5
8611-1259 Race 153 540 387 332 43.5
8611-1262 Race 153 540 387 332 43.5
 
Part Number Stroke Max 
L
Min 
L
A
mm
D
mm
8610-1436 Race 143 500 357 290 43.5
8610-1437 Race 153 540 387 332 43.5
 
Thread & Pitch Part Number
M48 x 1.50 73.25.01.003.1
M48 x 1.00 73.25.01.002.1
M51 x 1.25 73.25.01.006.1
M51 x 1.50 73.25.01.007.1
M52 x 1.50 73.25.00.025.1
52.8WW 73.25.01.011.1