Fabtech K9003 1.5-Inch Coil Assist Kit, B4 Struts & Auxiliary/Rear Performance Shocks — 2015–2021 Sprinter 2500 4WD

Fabtech K9003 combines the B4 front coil-assist package with two front auxiliary Performance shocks, two rear Performance shocks, the Sprinter 2500 rear kit and front wheel spacers.

Application

• 2015–2021 Mercedes-Benz Sprinter 2500 4WD with factory suspension configuration. Verify the year, model and drivetrain before ordering.
• This 2500 package uses the FTS28009 rear kit. Sprinter 3500, 2WD and later AWD applications are outside this listing.
• Nominal 1.5-inch system; the manufacturer describes approximately 1–1.5 inches of front lift. Actual stance depends on the vehicle and load.

Package contents

• One FTS28003 front coil-assist kit: two Bilstein B4 BIL22-314161 struts, two coil springs, upper/lower spring perches, support washers and specified subassembly.
• One FTS28009 rear box: two replacement rear blocks, four U-bolts, two bumpstops, spacers, brake-line/linkage brackets and specified installation hardware. The physical 4-inch blocks replace factory blocks; they do not add 4 inches of net lift.
• One FTS28011 front wheel-spacer kit: two wheel spacers, twelve extended studs, twelve lug nuts, socket and specified thread-locking compound. Rear wheel spacers are not included; order one additional FTS28011 kit separately for the rear.
• Two FTS7163 front auxiliary Performance shocks and two FTS7231 rear Performance shocks: four separate shocks in addition to the two B4 struts.
• One FTS28001 front auxiliary mount kit: driver and passenger upper and lower mounts with specified installation fasteners.

Installation and requirements

• Professional installation required on a stock vehicle. Read all supplied instructions, inspect the suspension and check alignment before installation.
• Retain the factory upper strut mounts. Install the spring perches, support washers and coils in the order shown in FT28003.
• Follow FT28009 for rear blocks, U-bolts, brake-line/linkage brackets and bumpstops. Fit one supplied FT120 spacer behind each upper rear shock mount as specified.
• Follow FT28011 for front wheel spacers and extended studs. Check tire, brake-hose and ABS-wire clearance through steering travel, align to factory specifications and adjust headlights.
• Recheck fasteners and wheel hardware after 50 miles and periodically as directed by the manufacturer.
• FT28001 requires two 17/32-inch drilled holes at each upper mount, four holes total. Remove the inner fender liners; trimming may be required. Follow the specified subframe/lower-control-arm mounting procedure.

Tire and wheel guidance

• Manufacturer reference: 275/75R16 tires with 16×8 wheels and 6-inch backspacing, with minor trimming. Verify wheel and tire clearance on the actual vehicle; wheels and tires are sold separately.

Manufacturer part number: K9003. Manufacturer product details.

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