Contrasting fortunes in the replacement parts and accessory sectors were highlighted by the 2002 Automotive Aftermarket Industry Week. Last year, Chuck Blum, the then president of the Speciality Equipment Market Association (SEMA) described the difference between the two parts of this annual Las Vegas-based event as being what people "want" and what people "need" for their cars. This year SEMA buzzed, in contrast with the more staid AAPEX writes Ian Wagstaff.