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2017-22 Ford SD 4.5" Alpha

Part Number: PMF-FRD-1514-
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2017-22 Ford SD 4.5
2017-22 Ford SD 4.5' Alpha
Your Price: $3,399.00

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The Alpha 4.5" kits are intended for the customer looking for a comfortable street ride, excellent towing authority, and a stable rearend for higher hp platforms.

We have designed these kits around 2 basic principles.  We upgrade the front to a quality dual rate coil spring which will provide a nice smooth ride on the street and improved offroad ability offering an additional 3+" of travel over a stock.  The rear is designed around the stock rear spring.  The '17+ trucks come stock with a leaf pack that offers a great compromise between ride quality and towing capacity.  With the Alpha series, the rear spring will be supplemented with a traction bar kit to give it a stable base when towing or any other performance scenario.  We do offer long travel replacement Deaver leafs that can be added to this system if desired!

This kit includes:

  • 4.5" Icon Progressive Rate Coils
  • 3 or 4-link Front Link System
  • 2.5" Swaybar Drop Brackets
  • HD Replacement Swaybar Links
  • Full Replacement SS Brake Lines F/R (setup for dual rear brake lines)
  • HD Drop Trackbar Bracket w/ Drop Pitman Arm
  • Stage 2 Gusseted Traction Bar Kit
  • Fabricated Blocks (choice of block height) 
  • Ubolts w/ Top Plates (your choice of diameter)
  • Choice of Shocks
  • Optional HD Adjustable Trackbar

Front Axle:
For the front end you have two options.  First we have our Long Arm 4-Link.  This is designed to give you the most control over axle and wheel hop.  It will keep your frontend planted for even the most brutal 4 hi launches or sled pulls.    The other options is to use of our Adjustable 3-Link Arms.  With these, you will notice tighter steering response, better street characteristics, and a more comfortable ride.  The increased strength of the link arms will have better control over the axle and allow for more articulation and shock absorption offroad.  This will make for smoother operation when hitting anything from potholes to whoops!  Regardless of which option you choose you will have the ability to adjust castor to your desired specs.  Front end steering and trackbar geometry is perfected using our heavy duty drop trackbar bracket and drop pitman arm.

Rear Block:
The rear end is designed to retain your OEM leaf pack in order to maintain factory payload capacities.  To gain the additional height, we use a traction block kit with a user selected height to allow you to get the exact stance you desire.  The rear system comes standard with our Stage 2 Gusseted traction bar kit to prevent any concerns of axle wrap or wheel hop that both high hp trucks and tow rigs will appreciate!

  This kit comes standard with 5/8" ubolts.  For high hp and performance applications we recommend upgrading to the 3/4" ubolts.  This is a HUGE upgrade over the strength of the OEM 5/8".  When selecting the ubolts choose either a single rear wheel (SRW) or dual rear wheel (DRW).

Leaf Pack Type:
Determine what type of leaf pack you have.  A standard leaf pack will consist of a leaf configuration where the top most leaf runs full length from eyelet to eyelet.  A standard leaf pack will have a thickness of 2-3".  If your pack is thicker than this choose the "top mounted overload option".  A truck with a "top mounted overload" will have a small spacer between the main pack and the top overload which is not connect to anything at each end.

We have many different shock options available.  All of our shocks are valved specifically for this application.  For the customer looking for some improvement in looks and performance the 5100 shock is a great all around buy.  The 5160 steps up its game and offers a resi.  There is a definite improvement in on and offroad performance.  The seal orientation on these is better for salty and harsh environments.  For the customer looking for the ultimate performance we offer our custom tuned King 2.5 shock package.  These are setup to give you the absolute best on and offroad performance!


If you want to have blue hoses, please let us know and we can check our stock on shocks with blue hoses. Otherwise, blue hoses may be purchased separately for a fee.


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