Dynaflex Stacks Kits

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Click your year below.

Peterbilt 359 1967-1987 Stacks

Peterbilt 379 1987-2003 Stacks

Peterbilt 379 2003-2007 Stacks

Peterbilt 389 2018 Stacks

Peterbilt 389 Glider 2008-Current Stacks

Peterbilt 389 2011-2017 Stacks

Kenworth W900L 1986-2007 Stacks

Kenworth W900L 1982-Current Stacks

Freightliner Classic FLD 20 1974-Current Stacks


How high should my top stack be? Various heights are available. Please use the chart below as a rough guide.

Top Stack Height Chart


Trucks with low air suspensions &/or low profile tires will sit lower than the table shown. To determine which top length fits your duty cycle best, run a tape measure from the center point of the top bracket, add the length of the top you're considering, & then divide by 12.