the new magnaflow system is the best system out now for the money being that its stainless.they got rid of that crossflow design.

 

The Loudmouth is stainless steal as well. It's $300 for a LM plus the adapeter kit which is 29-69 dollars for an LT1 car. I just bought my LM used for a 125 dollars. haven't installed it yet but my friend has it on his car and it sounds badass. I heard the Loudmouth flows twice as good as the Magnaflow. I can see that happening since it's nothing more than 3 inch pipes and hollow resonator.... no muffler.

 

I bought my Magnaflow off Ebay last week, and sent a money order for it on Tuesday. It showed up today and I only had time to inspect the system, but I'm very impressed so far. I got it for $250+$30 shipping....that's $280 flat for a brand new stainless catback. I'll let ya know once I get it put on and hear it for myself