I've been thinking about adding these for a while. Needed to lift the rear a little and decided it was the best time to do it. Found a good price a couple months ago when they were on sale for $220 shipped. Couldn't find the same price now. Bought them from and eBay seller for a good price with full warranty. Seller's name is radauto and she provided really good communication unlike some of the others.
The install instructions provided are alright, but not great. It's a pretty straight forward install. There are some places online that have Tundra instructions:
Truck Test Digest How To: Ride Rite Air Helper Springs
If you have a lift already, then you will need a different bottom plate for the bags. Don't know where you get that but in the above link, they have a taller one that will reach the axle.
Install took around 2.5-3 hours. Not very hard to do.
Here's one of them prepared to go in.
Their instructions tell you to cut off the top of the bump stops. I decided to just loosen the rear u-bolts and remove the bump stop. Sorry, no picture of that part. You need a 19 mm socket for the u-bolts.
It's a little confusing which way the top plates go in. Driver's side is numbers down, passenger side is numbers up. Both plates are identical and have numbers on them.
Jack the truck up by the frame about an inch. Put the plate in place, squeeze the bag into place, then use the washer and bolt in the top to hold it in place.
Then attach the bottom brackets to the leaf springs.
You might need to loosen the bracket for the brake line to get the air bag lower bracket in place.
Then put in the air line attachment.
On the diver's side, you need to remove two bolt that hold the fuel controller in place on the frame. Here's the bolts you need to remove. This is in the wheel well.
After that is loose, just move it out of the way and then install the air line attachment. You can then reinstall the fuel controller in place.
I didn't like the air valves being installed in the bumper. Didn't seem like a good place to put them. McColl had the good idea to install them into existing holes in the bed. Seemed like a pretty good idea, but I was worried about damage to the stems.
http://www.toyotatundraforum.com/gen...installed.html
I had read somewhere where someone suggested to install them behind the gas cover. Made them hidden, easy to get to and protected. If you use an air pump that plugs into a cigarette lighter, it's within reach. So that is where I decided to put mine.
When picking where to put them behind the cover, be sure to put them where an angled air gauge or angled air hose nozzle can get to them. I pulled the cover out to work on it. Went ahead and opened up the wheel well cover to get a little more access to the area. Also covered all the lines with split loom all the way to the bags to protect them a little more.
Drilled two 5/16" holes after a couple of measurements and was good to go. Took some extra pictures so you could see exactly where they are.
Ran the lines up to the fuel cover.
Attached the lines and reassembled everything.
And here's a picture of the bag with the minimum 5 pounds in them.
I think I might get a couple of small levels and install them out of view on each side of the truck. Should make it easy to level the truck quickly with a load in the bed.