With regards to emissions compliance requirements, about the only thing constant is change. New methods for controlling and processing exhaust emissions continue to emerge from the car companies. Such technologies are unavoidably confronted by SEMA members seeking to design parts and systems that are functionally compatible, particularly with respect to how vehicle emissions may (or may not) be affected. In fact, the challenges to create emissions-compatible specialty parts often increase for each new vehicle model year.
SEMA's Black Book: Helping You Create Emissions-Compatible Specialty Parts
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