Disclaimer:

KBD polyurethane diffusers are aftermarket aerodynamic accessories designed specifically for off-road and show use. KBD disclaims any responsibility for damage or injury resulting from their use on public roads, as these diffusers are not intended for that purpose. Due to the nature of polyurethane and the manufacturing processes involved, KBD diffusers are not ‘direct bolt-on’ parts and often require extensive preparation, including sanding, fitting, or custom bodywork. Common issues with polyurethane diffusers include potential warping, cracking, or fitment challenges, especially if they are not handled or installed properly.

These diffusers typically fit below the rear bumper, and in many cases, the bumper may need to be modified to accommodate the diffuser. It’s important to note that many diffusers are designed to fit specific bumpers, certain trims, or aftermarket styles, so careful attention should be paid to design and compatibility when selecting and installing a diffuser.

In terms of installation, KBD diffusers generally require separate mounting hardware, which is not included in the package. This hardware often includes L-brackets, bolts, screws, washers, and other fasteners. L-brackets are commonly used to securely attach the diffuser to the vehicle's chassis or bumper, while bolts and screws ensure a tight fit. In some cases, additional supports or reinforcements might be necessary, depending on the design and specific fitment of the diffuser. Since this hardware is not included, installers will need to source the appropriate materials separately, ensuring compatibility with both the diffuser and the vehicle.

For optimal results, KBD recommends professional installation by a custom shop experienced with polyurethane components and aftermarket accessories. Traditional auto repair shops may lack the expertise to properly handle the nuances of polyurethane fitment and hardware requirements. KBD products are strictly intended for off-road and show use. Due to Department of Transportation (DOT) regulations, most KBD diffusers are not street legal, and KBD does not endorse or recommend using these diffusers on public roads or highways.