Nhred
The difference is Aero is claiming FUEL MILEAGE GAINS! and posting on its website testimonials of FUEL MILEAGE GAINS which IMO are FALSE and MISLEADING, do you see any such claims on Magnaflows website? do you see "customer testimonials" plastered on Magnaflows website that state outlandish fuel mileage gains? Nope........why? because Magnaflow has a reputation to uphold and a long history of providing a quality product, Aero probably knows they wont be around long so they will probably say and do anything, pretty easy to offer lifetime warranties when you may not be around to have to honor those warranties.
I posted a challenge to Aero to send me a muffler and I stated if it beats the Magnaflow in HP, torque and fuel mileage then I will pay full price for it. as Long as it did not have an obnoxious noise to it, have not heard a peep about that since, a free test to prove the product does what they claim and the company wont take the challenge?
I am sure they read this board so it is not like they dont know the free test is available to them, it can only mean one thing Nhred, they know the product will not beat a magnaflow and is not as the testimonials claim.
The ball is in their court, do they wanna play? or are they still in "stealth mode" or as I put it.."run and hide mode"?