I have had the girls at the wife's office saving their empty mousse cans and have a bag full...each is the 8.0oz size..

Someone told me one time that the muffler or combination of mufflers needs to have ten times the volume of the motor cubic inch or cc

True or not...

What would be a good size of inlet and outlet tubes be...or does someone have a formula for this also..

Any help would be appreciated
BB1