I bought my car with a pro-flo muffler and a really poorly done custom exhaust but everything is holding up and mandrel bent. How does the pro flo rate as far as power and performance go? I know everybody hates blowmaster so that's out of the question but i would kinda like to get a decent exhaust and get rid of the giant 4" chrome tips that poke out unevenly. Also while I'm asking is there any performance downside to just running the turn downs like the cars had stock? bigger tubes of course

 

really that bad eh?