currently i have a flowmaster 40 series with delta flow on my 4.2 v6. it sounds pretty good but it isn't quite as aggressive and deep as i want. i was wondering if anyone knew if the 30 series high performance muffler would sound deeper and more powerful than the 40 series with delta flow?

 

If anyone thinks I am wrong tell me. But I i had the same problem choosing which one to get and i found out that the 40 and 30 series is almost the same thing. The 30 series makes it deeper just by a little not that much then the 40 series. I did this on my truck and I have a 40 series. Plus the 40 series is cheaper.