In April of 2003 it appears that ATS Racing has gone out of business. This product is now being sold by Inland Trucks.
The ATS drives side arm on top of the stock drivers side arm.
The ATS Tacoma arm is 3/16" longer than the stock arm, in reference to the ball joint placement.
ATS passenger side and stock driver side. The ATS poly bushings are sleeved.
Remove the nut on top of the ball joint.
I used a gear removal device from Auto Zone, the hammer on the side of the arm method was not working.
Ball joint popped out of the arm. Remove the battery and the yellow air bag sensors, they unplug. Then remove the nut on the long bolt and slide the long bolt towards the front of the vehicle and out.
ATS arm installed and ball joint inserted into the new arm. Reinstall the long bolt in the reverse order of above.
ATS upper a-arm and Sway-A-Way RaceRunner coil over.
Tighten down the ball joint nut and put a new cotter pin in.
Installed upper a-arm.
The complete Sway-A-Way and ATS a-arm setup.
The ATS Tacoma a-arms actually gave the 4Runner an additional 1/2" of lift so I cranked the coil overs down. The axle boots are unbelievable for 2" of lift. None of the fins touch and there is around 1/4" between fins. The ATS upper a-arms truly are magic arms. I really can not say that I fully understand how the arms accomplish this but they certainly do that's for sure. After a front end alignment the boots were not as good but still much better than before.
Updated 9-30-2002
After my original alignment we discovered that the 4Runner has less adjustability than the Tacoma in the lower a-arms. Chris at ATS Racing verified this on a 3rd Gen 4Runner in California and went to work on a shorter arm for the 4Runner. The original Tacoma arm was 3/16" longer and the newly created 4Runner arm is 1/16" longer. With all of the adjustment cams all the way out, the mew arms are in perfect alignment. These new arms create the widest stance possible while still retaining the stock lower a-arms on a 3rd Gen 4Runner, improve ball joint angles and allow for additional droop. Combine these arms with the Sway-A-Way Race Runners for an awesome IFS front end. The new finish is a textured powder coat the same color Pro Comp uses on there components. These shorter arms DO NOT give any additional lift.
Updated 4-1-2003
In this shot you can see that the lower a-arms are moved out to max adjustment. With the stock a-arms the lower a-arm was 1/8" to 1/16" from the Rockstomper Type II skid plate. Now you can see it is 1 1/8" to 1 1/16" outward. The added width gives you the added travel. If you get your 4Runner back after the front end alignment and the tops of the tire lean outward, the shop did not correctly align your vehicle. They may have adjusted the toe-in but did not adjust the camber by pushing the lower arms out to the widest stance position.
Here you can see how much the arms moved outward. Notice the cam above is set to the max outward position. The difference between the Tacoma and the 4Runner arms comes down to this adjustment on the frame. The Tacoma has more adjustment and can push the arms out further than the 4Runner. Keep in mind that the Tacoma is made in California at the joint GM/Toyota plant, United Motors and the 4Runner is made in Japan. Although these vehicles have very similar components they are not the same.
If your cams do not look like these, all at the max position, your alignment was not done correctly.
Updated October 2004
I removed the ATS/Inland Trucks arms and went back to "heavily shaved" stock upper arms. I can get a tighter alignment with the stock arms and these aftermarket arms are optimized for a coil-over such as the Sway-A-Way RaceRunner which I no longer run. I currently run Stock Toyota Tundra front coils.
In April of 2003 it appears that ATS Racing has gone out of business. This product is now being sold by Inland Trucks.