As a rule of thumb a larger head pipe diameter would deepen the exhaust note on most motorcycles. A more simple solution that would also help maintain peak performance would be to repack your muffler regularly with a good quality packing material.
Exhaust temperatures on a motorcycle can reach as high as 800f.
Exhaust of an engine is a gas.
exhaust leak
Change your exhaust pipes.
Research has shown that a Hayabusa is a motorcycle that is produced by Suzuki. One can purchase these exhaust systems from Amazon, eBay and Motorcycle Superstore.
rumbling, go to youtube and search for motorcycle exhaust to get a better idea
when a cop can hear it from the inside of his car
Leak in the exhaust system?
An Exhaust
jardine pipes
The Cobra's exhaust is made in the USA and is backed by a lifetime warranty. Their exhaust pipes are made to withstand any type of force you can bring to it.
The average temp. of a motor cycle exhaust pipe is 600*F or 315*C !!