exhaust sound levels

[Don]

Hi:
I am finishing rebuilding a vintage vee that has 4 seperate exhaust pipes rather than a collector. There is a noise restriction where I race. A vee with the usual 4 into 1 collector and megaphone is under the limit and is ok. Does anyone know if 4 seperate pipes would be signifcantly louder (or quieter)? Would hate to get therte and not pass tech.

thanks don

[shark32]

My son first ran his Beach 5B with the original 4 pipe exhaust. It had a lower sound than the current 4 into one system that he has now. The four pipes give more of a bass rumble.

Barry