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My (standard) exhaust system certainly pings and cracks - especially during warm up as the stainless steel expands. I put it down to the relativly short length of the headers and cats to the exhaust tip - most cars have 2-3 meters of exhaust pipe length to absorb the expansion, but the boxer engine has probably less then a meter. It gets hotter faster and cooler quicker....
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2001 Boxster S (triple black). Sleeping easier with LN Engineering/Flat 6 IMS upgrade, low temp thermostat & underspeed pulley.
2001 MV Agusta F4.
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