1994 GMC k1500 flowmaster 50 or 70?

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i was looking at getting a new muffler for my 94 gmc k1500 i want flowmaster but i dont know which one really sounds better the 50 or 70 series?

or what do you guys think would be good for my truck only flowmaster im keeping it single NOT doing dual and just doing a turndown pipe
my truck is a 5.7
 
Get a 3 inch all the way out and it will sound good.


If you want to step up from stock get the 50 if you want a real nice deep loud sound get the 70 with 3 inch
 
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