Is there a significant difference in terms of air-flow between a Magnaflow cat and stock cat for a '99 1500 5.9L? Will it improve the sound of my 50-series cat back?

 

I dont know if that a magna flow cat will be that much beter than a new cat from dodge however i am sure that it is alot better than ur 1999 cat that is prob getting a little cloged by now. and who knows it might be way better and i know that they are not to expensive (around $50 on ebay) so u might as well give it a try and make sure and post ur results.

 

i just bought one off of ebay it was like $85 shipped....
i haven't installed it yet, but this weekend i am going to,
ill post some results, so lookout! plus i gotta 40 series flowmaster 3 inch single.