1997 Ford F350 Owner Guide 1st Printing - Page 304

Do not tamper with the noise control system Federal law prohibits the following acts: 1. The removal or dismantlement, (by any person unless for maintenance, repair or replacement purposes) of any device or design element incorporated into any new vehicle to control noise output, prior to its sale or delivery to the consumer, or while it is being used, or Using your vehicle after a device or design element has been removed or dismantled, by any person. 2. The following are some of the acts that are considered tampering: u Removing the hood blanket, fender apron absorbers, fender apron barriers, underbody noise shields or material constructed to absorb noise output. governor, so that the engine's speed exceeds the manufacturer's specifications. silencer, air cleaner and/or air cleaner element. u Removing or dismantling the engine speed u Removing the air duct, air intake choke or u Removing or dismantling any of the exhaust system components including the catalyst inlet pipe, muffler, outlet pipe, resonator or diffuser. u Removing the fan shroud. Removing or dismantling the fan clutch so that it no longer functions properly. 305