Really, the Super-40's came out probaly around 2 years ago, maybe a little longer.
I put one on my 4.0 Jeep not long after they came out.
They are more tame on the inside than the origional 40's and slightly more agressive on the outside.
They have a nice tone to them. I loved the sound when it was dumped, but it is quiet through the tail pipe.
You need to understand that the US Goverment Discovered Flowmaster 40's in a secret under water cave where they also found the Mclaren F1 and the Hold Grail
Ohhhh..... He said Super 40's! I missed that part!
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