Switched Engine Vehicles
Engine-switched vehicles have had the manufacturer's original certified engine configuration removed and replaced with another engine configuration.
It is a violation of both federal and state law to install an engine configuration into a vehicle chassis that is not certified by the EPA. Certified engine configurations must match either the same or newer model year as the vehicle chassis. Installing an engine that is older than the model year of the chassis is not legal. (See 11 CSR 50-2.280 (1)(A).)
All engine-switched vehicles are tested according to the model year of the chassis, which is determined from the Vehicle Identification Number (VIN). If the vehicle passes its emission inspection, it can be registered. However, if the vehicle does not pass its emission test, a visual inspection will be conducted to identify any possible tampering or engine switching. If this visual inspection shows that a vehicle has an uncertified engine configuration, the vehicle cannot be registered. (See 11 CSR 50-2.280 (1)(E).)
Example: A 1997 Ford with a 2002 Ford engine will be tested using 1997 model year cutpoints. If the vehicle fails, a visual inspection will be conducted. The vehicle will need to be repaired to meet 1997 emission cutpoints. The repairs will include installing a certified engine configuration.
For more information, visit the following website: U.S. Environmental Protection Agency