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Tarett Engineering Rear Sway Bar Installation Instructions
Last Updated: 01/08/2014


1) Tarett Engineering rear sway bars are designed to mount directly to the factory mounting brackets

on 1965-89 911’s, 912’s & 930’s. Any cars without factory mounting brackets will require them to be

added. Factory brackets should be reinforced for competition use. Consult your local distributor or

Tarett Engineering for further information.

2) Remove the existing rear sway bar assembly and all associated bearing blocks, drop links, and


3) Apply a film of wheel bearing grease to the inside of the two bushings that have been preassembled

in the bearing blocks (items #3 & 4). Position one of the bearing blocks as shown and tighten the

mounting screws only finger tight at this time. Note that the bushing flange should be facing towards

the center of the car.

4) Slide the shaft collars (item #5) onto each end of the sway bar and place one end of the bar into the

bushing from the other side of the car. Install the other bearing block as shown and torque the

mounting hardware to 19 ft-lbs. Center the sway bar to the car and position the collars against the

bushing flanges. Torque the pinch screws on the shaft collars to 8 ft-lbs to lock them in place.

5) Remove any grease that may have been wiped onto the square end of the sway bar and install the

arms (item #2) with their hardware as shown. Position each arm at the end of the bar and tighten the

pinch screws (item #13) to 19 ft.-lbs.

6) Rotate the sway bar by the arm to check for excessive drag or binding. Light drag, due to slight

bearing misalignment, that can easily be overcome by hand is common and will not affect sway bar

operation. Determine the cause of any binding and take corrective measures before proceeding


7) Assemble the rod ends and locking nuts (items #7, 8, &10) as shown. Do not tighten the locking

nuts at this time. Remove the existing toe in adjusting eccentric (the most forward eccentric) and

replace it with the adapter cam (item #6) connecting it to the upper rod end with the new hardware as

shown. Tighten the mounting bolt (item #9) to 60ft-lbs.

8) With the car on the ground, adjust the drop link length such that the top of the arms will be

approximately horizontal as shown. Connect the lower end of the drop link assembly to the arm (item

#2) with the hardware as shown and position for the desired sway bar stiffness. Tighten the lower

mounting bolts (item #16) to 60ft-lbs. Tighten the drop link locking nut (item #10) to approximately


9) Inspect the sway bar components for any binding or interference throughout the range of

suspension travel and take corrective measures to resolve any problems found. Also insure that the

brake lines maintain a safe distance away from any moving suspension components.

10) The sway bar stiffness rate can be increased by moving the upper drop link rod end closer to the

sway bar and reduced by moving it away from the bar. Both sides should be adjusted equally to

maintain similar handling on both left and right turns. Generally, increasing the front bar stiffness rate

or decreasing the rear bar rate will increase traction in the rear of the car and reduce traction in the

front. Reducing the front rate or increasing the rear will decrease traction in the rear and increase

traction in the front causing oversteer in the extreme condition. Due to variations in car weight

distribution, tire compounds and sizes, track conditions, driving styles etc., there is no one set up for

that works best for all cars. If in doubt on the initial set up, start with the front bar set in the middle

setting and the rear set relatively soft near the end position. This will reduce the chances of having an

oversteer condition which could be difficult to control.


Tarett Engineering sway bars are designed for on-track competition use and should be installed

and adjusted only by mechanics experienced with high performance suspension setups.

Improper installation or adjustment can cause undesirable and dangerous handling

characteristics. Always use extreme caution when testing any suspension changes and slowly

increase speed to safely evaluate the changes in handling. Never continue to drive at speed if

poor or undesirable handling characteristics are detected.

To Purchase the Tarett Engineering 911 Rear Sway Bar Click Here.

Link to Rear Sway Bar Diagram.

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