Does the mac catback hooked up to your y pipe help ur performance like hp?

 

it may slightly make a little diffrence but your better off going with true duals

 

no, ur still pushin the exhaust through 1 pipe in the midpipe

 

+1

 

I think it is the best sounding exhaust on a 6. No rice sound at any rpm. Many ppl mistake my car for a V8 sound with the cat back 2.5inch with 3" tips Mac system. The one with the y-pipe attachment. I HIGHLY recommend it