Ferrari Exhausts

We had a 599 Ferrari in or removeable custom track day cans.  Bit tricky this one because it had 4 tips and a tuning butterfly in 2 of them.  The system pressures were fluctuating from about 2000 RPM and it looked like we might need 4 cans.  In the end we isolated the tuned system, noise metered it and built cans to deal with the fixed system at minimum exhaust pressure with maximum back pressure from the cans. When the valves were opened the pressure balanced through the open pipes and the noise reading was spot on. Dropped it from 112 db to 94 db, still sounded lovely too.

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