We are running 2-4 weeks on parts we manufacture, depending on what it is. Radflo is running 16 weeks for shocks and coil overs. There are no upcoming Radflo discount sales scheduled for 2022 at this point.

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Trail/TRD Off Road KDSS Full Articulation Kit - Adjusters


Add to Cart:
Radflo 2.5 Front Reservoir/Compression Adjuster Coil Overs and 2.5 Rear Reservoir/Compression Adjuster KDSS Specific Shocks

(2) Radflow 2.5 Front Coil Overs: Remote Reservoir/Compression Adjuster and spanner wrench
(2) Radflow 2.5 Rear Custom Shocks: Remote Resivoir/Compression Adjuster KDSS Specific Shocks
(2)-Radflow Custom Wound 2" Lift Rear Coils
(1)-Sonoran Steel Built Adjustable KDSS Trac/PanHard/Lateral Bar

* Front Coil Overs can be ordered with the following coils: 600, 650 or 700.  These numbers are how much weight it takes to compress the coil 1 inch.  600 is typically for a stock truck and 650 a truck with a winch and bumper. 

* Front Coil Overs Available in Standard or Extended.  Extended requires an aftermarket UCA.  We recommend the Camburg Ball Joint Arms, JBA or Light Racing Arms - the new cast version. We will e-mail you after you place the order for this information.  

In 2012 we bought a brand New Trail 4Runner with KDSS. While the bulk of or work at that time was with 3rd gen 4Runners (1996-2002), I knew this was one heck of a truck and spent years dreaming up parts to make it better. After installing our current offering and other manufactures suspension offering for these trucks, there was one thing that I felt everyone dropped the ball on.

The Trac/PanHard bar for the KDSS trucks. We all know that the Jeep Wrangler and the American full size pickups with straight front axles had Trac/PanHard bends in them to dodge around things for many years. These bars are all sand cast and difficult to manufacture on small scale, which the KDSS market it.

After working on this for literally years we found a solution. The original prototype was fabricated out of cut tube and zigzagged all over the place. It was incredibly time consuming to make and frankly looked ugly. But at that point we had a pattern that cleared everything. Full stuff with coils and shocks removed and full drop with shock removed. We now knew exactly how far the KDSS bar would let the suspension move, uninhibited bay the trac bar.

So finally how do we actually make this thing? Waterjet is how. Starting with a 3 foot by 3.5" of Cold Rolled Solid Steel Bar, the Waterjet carves this bar out of solid 1" thick cold rolled steel! The entire bar is a consistent 1" x 1" solid cold rolled steel. It is heavy. On the 4th gen 4Runner, Toyota used 1" round solid hot rolled round stock. So this is not a new idea with the size and material used in this application. The ends are custom polyurethane bushings made for us by Daystar in Phoenix. They have grease grooves and we have made several improvements to the mold over the last 8 years (2010-2018) as we have always made a straight tube Trac/PanHard bar for the 4th/5th Gen 4Runners and the FJC. The adjustable end is a huge 7/8"-16 grade 8 threaded rod into a tube adapter made by Ballistic Fab in Tucson, hollow end of the bar is 1.5" x 1.5" x .120 wall Cold Rolled Square Tube, finally the same bushing setup as the other end. Finally the part is painted with STEEL-IT® super corrosion resistant paint.

The rear shocks are custom made by Radlo just for us and are designed to retain the stock compressed length/upward travel. So no up travel is lost. What they have done is add additional droop to allow the hydraulic plunger to drop an additional 1" downward. This leaves an additional 3/8" plunger travel still, so no damage will occur to the unit. These shocks WILL NOT pull your plunger out too far. They utilize the maximum up travel provided by Toyota and the extra down travel provided by our custom Trac/PanHard bar for the ultimate KDSS articulation. You MUST use stock Toyota upper and lower rear links or aftermarket upper and lower rear links that are set to the same length as the stock Toyota rear links for this product to work correctly. It does not matter if they are stock or aftermarket, it only matters that the length of the links is the same as stock.

KDSS Specific Full Articulation Trac/PanHard Bar.

FULL DROOP, No Shocks Installed.

FULL STUFF, No Coils Or Shocks Installed.

Custom Radflo KDSS extended travel reservoir shocks.

Custom Radflo KDSS extended travel reservoir shocks.

California Residents:  Radflo products ship directly from Radflo which is based in California.  According to California Law: Sales and Use Tax Regulations, ARTICLE 18. ADMINISTRATION—MISCELLANEOUS, REGULATION 1706, DROP SHIPMENTS.  If you have the Radflo products shipped to an address in California, you will be contacted AFTER the sale with the amount of sales tax you owe the State of California.  This sales tax will ONLY be collected on Radflo products and not on Sonoran Steel Products which originate from the State of Arizona.


Today's marketplace offers more choices than ever before. New brands are constantly emerging, while established names attempt to recapture your attention. With so many choices available, you may be wondering what advantages Radflo has to offer. Actually, we're glad you asked!

From the materials used to produce each individual component, to the final assembly procedure, Radflo employs the highest quality standards at all times. For larger manufacturers and high volume products, the temptation to save money on materials and production is often impossible to resist. When you choose Radflo products, you can rest easy because we always place quality before profitability. No exceptions!
Simply put, Radflo customers get more for their money. Just because we don't charge as much as our competition, don't believe for a moment that we deliver less. In fact, we believe you will find our products to be comparable – if not superior – to those available from the most respected names in the industry.
As a supplier to the OEM, aftermarket suspension manufacturers, and some of the most successful racing teams in the world, we have the knowledge, experience and resources to make your suspension perform better than you ever thought possible. Radflo customers around the world have used our shocks to achieve success in virtually every type of application you can imagine. Motorcycles, drag racers, street rods, trophy trucks, even open wheel race cars... if it has a suspension, we have the solution.
Call us old fashioned, but we believe superior customer service is still the cornerstone of any great company. While other manufacturers rely on virtual customer service representatives and automated call handling systems, Radflo does not. When you call us, you'll always be greeted by one of our friendly, knowledgeable representatives who are eager to assist.
Our highly qualified technical support staff is ready to help you with any service related issues that you may require. They take great pride in responding to your needs with efficiency and diligence. Even when your warranty has expired, you can still count on our support team to provide a fair resolution to any technical matters that may arise.

Front Radflo 2.5 with External Reservoir and Optional Valving Adjuster Shown.  Camburg Ball Joint UCA's Shown (Available from other vendors) 2015 TRD Pro 4Runner.

Rear Radflo 2.5  with External Reservoir and Optional Valving Adjuster Shown.  2015 TRD Pro 4Runner.

Rear Radflo 2.5  with External Reservoir and Optional Valving Adjuster Shown.  2015 TRD Pro 4Runner.

Canadian Customers.  We do ship to Canada.  But you can not put the order in through the online store.  Due to the ever-changing taxes/tariffs/broker fees.  We are sending small parts through the postal service and lift kits through UPS.  If it ships through UPS you will be charged a broker fee and taxes on your side of the boarder.  With the postal service typically, you will not.  But things change constantly.  Most of our Canadian lift kit customers ship to a mail drop on the US side of the boarder and bring the kit over.  We realize that some people live way too far away from the boarder to do this.  In that case UPS and the baloney that comes along with it, is the only way to go.

We can ship to Canada, e-mail us for us custom shipping quote and we will find the best way to get the product to you.  We can then send you a custom PayPal Invoice to settle up.

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