Cheap vs Expensive "Performance" Mufflers

We Featured Three Previous Articles About "Performance Shoot-Out's" for Classic Car Owners

In today's post, Engine Masters measures the power difference between those super expensive stainless steel bolt-on's that are marketed to be "oozing tons of extra HP" and their bargain basement brethren. 

We've all seen the advertisements exclaiming "If you want the best performance and a sound 'that means business', ya gotta buy ____________ mufflers" and alternatively "Classic Sound Since 1966". The question is which one should you buy?