Firestone 4179 Coil-Rite Air Helper Spring Kit

With the Pilots independent rear coil spring suspension, these vehicles will squat with a load causing extreme negative camber and inside tire wear. New HD coil springs helped but it was still a problem. Now with these air helper springs, heavy loads are easily managed by adjusting air pressure to keep it level and tire camber in spec. I mounted the inflation valves under the fuel door to keep clean and out of sight. The ride is still as smooth as before and cornering is improved with less body roll. Installation was straightforward if you have mechanical ability and good tools. I drilled the hole in the lower control arm larger than instructed, (1 inch) to allow extra room for the airbag valve. Be sure to drill in the center. And to prevent damage, added a few inches of 1/4" rubber tubing where it extends through the control arm.

The kit works great. It raises the suspension back to where it should be, which corrects the alignment problems. Drilling the holes in the control arms is a bit difficult, but other than that it is a very easy install. A good set of drill bits and a lift would have made it easier.

Excellent produit et relativement très fiable.

Overall good quality components and materials. My only concern is that the rubber like support that takes the place of the jounce bumper does not have any metal or other rigid component that limits how much you can tighten the bolt securing it to the upper spring mount. I used loctite and tightened the bolt to no more than 5 ft. lbs. to prevent the rubber from being overly squeezed out by the bolt.

The installation went well but it advertised that no drilling was needed, but I did have to drill a hole in my lower control arm for the air line to go through.