05-07 FORD F250/F350 2.5" COILOVER 2.5 SYSTEM, BASE, DIESEL

The Coilover system rides nearly identical to the Pintop. Take the description for the Backcountry and throw an exponent on it. Benefits of the Coilover System over the Pintop system are aesthetics (what looks cooler than a coilover?), height adjustability for large bumpers/winch combinations, and future upgradability. Once the coilover plates are installed, you’re a Coilover tune and Front/Rear Bypass purchase away from owning the Coilover-Bypass System.

The Coilover system boasts Carli specific, blueprinted, 8” Travel King 2.5” Coilovers front and 13” travel rear piggy-back reservoir shocks. We designed a custom piston to determine proper base flow rates to ensure the shock works well in the heavy-duty truck platform; then tuned the shocks around the custom pistons based on seat-of-the-pants feel. All King shocks feature shafts machined and polished from a solid piece of 17-4 Stainless. Unlike King’s standard shafts, there is no coating to wear off, weather can’t hurt them, and if there is a small chip, you can round the edges with emery cloth to ensure the seal housing isn’t damaged. The shocks are finished with King oil good to -55° F and are built with a plated steel body. For extended inclement weather, we recommend wrapping your shocks in 3M for a replaceable moisture barrier.

The Coilover is a Jack-of-all-trades system from which every Super Duty owner would benefit. Raising the Super Duty Platform then adding Carli Tuned, 2.5” diameter shocks (55% more piston surface area than a 2.0” shock) proves these trucks should come equipped with 2.5” shocks from the factory.

The truck will sit 2.5” higher in the front and have more wheel travel thanks to the coilover mounted in the Carli Coilover Conversion Bracket. The included Adjustable Track Bar centers the front axle and Stainless Brake Lines firm up braking and ensure there is enough line for the newfound travel. Caster Shims are included to tighten the steering.

The rear can be outfitted with a replacement Full Progressive Spring Pack (reduces capacity to a “light” ¾-ton) or factory leaf-pack modifying Progressive Add-a-Pack (maintains factory payload capacity and pairs with the factory 2” block). Since 2008, the F250 has a lighter rate spring pack than the F350. The F250 Add-a-Pack equipped systems are a nice improvement over stock; the F350 with the Add-a-Pack is still very stiff in the rear. We recommend the Full Replacement Leaf Spring packs for both trucks, especially the F350 given the super-stiff factory springs. If capacity is a concern, an aftermarket airbag system should be installed with the Full Progressive Leaf Springs to restore F350 payload. Use a system that allows airbags to disconnect from the lower mount during suspension cycling to maximize rear travel. The Full Progressive Leaf Spring Pack shifts the axle slightly forward in the wheel well to ensure maximum tire clearance for a 37” M/T at full compression.

If ordering this kit with an Add-a-Pack, Super Duties equipped with a 3-5/8″ tall block from the factory will require the factory 2″ tall Block to achieve a leveled stance. Part Number: 7C3Z-5598-L and 7C3Z-5598-K

Wheel and Tire: Factory wheels should not be run with oversized tires as they can rub the radius arm, sway bar, and brake lines. Factory tires and wheels work without issue. For our 2.5” Ford Systems, we recommend 17”-18” wheels, no more than 9” wide with 5.5” backspacing with Carli Fabricated Radius Arms or 5” backspace with factory arms (5” may require trimming). Tires: 37×12.5” will fit with trimming; 35” will likely fit without trimming. More rubber provides better small bump compliance at proper inflation pressures. Ride will firm up as wheel diameter increases. See our article on wheel and tire selection and tire pressures for details.