What is the Super Duty? Many people confused about the super duty or heavy duty, please follow the easy tips: the "dynofit" 2.5 lift kit only fit for 2005-2020 F-250/F-350 Super Duty (4WD)all the 1999+ F250/F350 called "Super Duty“ version, they called "heavy duty(HD)" before 1999some customers are still used to call their 1999+ F-250/F-350 as HD or Heavy Duty (reading History-Present-Future if you like)-----other useful info next History The F-250 has been available for years as part of the Ford lineup. It provided more hauling and towing capacity than the F-150 half ton series, although it was available in the same configurations. It was offered in two versions, the light duty and the heavy duty. The light duty is built on the same frame as the F-150 with heavier duty springs and axles. The heavy duty model shared frame and hardware characteristics with the F-350 one ton model. In 1999 the light and heavy duty were separated as the regular F-250 and the F-250 Super Duty. Present As early as 1998, the F-250 and F-350 were assigned their own heavy duty category by Ford. The non super duty stayed in the light duty category with the F-150. The Super Duty resided in the category with the F-350. In 2000 all F-250 trucks recieved the Super Duty badge and they have ever since. Today the F-250 and F-350 reside in the Super Duty category of Ford vehicles. Future The F-250 is assured a future in Ford history by its innovation and clear contribution to sales in the Ford lineup. It appears that it will continue in the Super Duty category for the forseeable future, available in four different trim packages and several different configurations How much lift to choose? step 1: Measure the front from ground to the fender well bottom(such as 36.5") step 2: Measure the rear like step 1(such as 38.9") step 3: 38.9-36.5=2.4",(so we can choose our 2.5" lift) Note: It can raise 2.5" around, but not exactly depends on different vehicles Dynofit 2.5" Leveling Lift Kit Content: 2 x solid Aircraft Billet front structs spacer 2x 2gen Hight Strength Steel Shock Extenders 4x 10.9 Grade Lug Bolts washers and lug nuts Dynofit suspension lift kits is drill process by cnc machine which can maximum strength and increased safety Brand Category List: 1> lug nuts 2> leveling lift kits 3> wheel spacers 4> torsion keys 5> control arms/camber arms 6> repair tools Upgrad Hole Exquisite Surface Treatment Precision Thread Why Choose from "dynofit" ? (FOUR CONCERNS) Oval Hole VS Round we change the extender hole to make a easy and right installation, this can help a good line up!!! If you buy round one,you may have to file them down to get the frame bolt through or drill out the holes bigger or cut That piece out in the side of the extender, or... White lock nut VS Blue when you turn on/off a blue lock nut, It easily split/break, the blue one cheap and not durable enough!! It's time to choose "dynofit" white locking nut, It works well even re-used sevral times! Real 10.9 grade black bolts we choose true 10.9 bolts high strength and anti-cracking really durable under test! Our pro Tec dep and QC/QA check the production process strictly! Choose "dynofit" Choose "safety driving" CNC machined exact specs for right installation strong welding beautiful CD line clear and smooth thread pitch This set helps you run bigger tires! you will like the look! F-250 spike lug nuts (chrome) F-250 spike lug nuts (black) F250 F350 Block&U-Bolts Add to Cart Add to Cart Add to Cart Customer Reviews 4.6 out of 5 stars 1,904 4.6 out of 5 stars 1,904 4.3 out of 5 stars 162 Price $59.99$59.99 $57.99$57.99 $79.99$79.99 Fits Aftermarket Wheels Only Aftermarket Wheels Only / Brand Dynofit Dynofit Dynofit Vehicle Model F250/F350 F250/F350 F250/F350 COLOR Chrome Black Black SEAT TYPE 60 Degree 60 Degree /