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How to Determine Air Bag Spacer Needed to Install Firestone Ride-RiteAIr Bags for 3 Lift  

Question:

I have a 2008 Silvarado with a 3inch Rough Country Lift. Blocks on the rear. What Bags could I use or what extra items would need to be purchased?

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Expert Reply:

Air bag installation in a lifted truck can require lift spacers to bring the air bag's upper and lower brackets to the appropriate spacing for proper operation. Sometimes this means that a "3-inch lift" will need a spacer kit but this may not actually be a 3-inch spacer; the key is to measure the placement of the brackets in your application.

For the Firestone rear-axle air bag kit # F2430 (that fits your 1500, both 2WD and 4WD) you'll want to check the installed locations of the upper and lower brackets. Check out the linked instructions for details. Choose the spacer as noted below based on your measurements.

Bracket Spacing (in.)
6.5 to 7.5-inches use spacer # F2536
7.5 to 8.5-inches use spacer # F2366
8.5 to 9.5-inches use spacer # F2367
9.5 to 10.5-inches use spacer # F2370

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Adam R
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Instructions for F2430

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