alright, thanks...and for smoke...i strongly agree!!! aint nothing likea good sounding exhaust!

 

HELL YES

 

I know I am a newbie here but here is my 2 cents. I have an 06 Crew Cab Z71 and just put the 50 series Big Blocks on it. I have had it for 2 days now and couldn't be happier. Deep rumble on the outside, quiet on the inside. Go to Flowmasters website and listen to the sound clips and compare the sound charts.

 

Dont Know much about the differences in the muffles But I have a 10 Series flowmaster. It's a racing muffler. However if you look into the muffler select a small inlet and outlet diamiter for the pipe because you will loose a lil back pressure. As for your sound problem invest in some dynamat http://www.dynamat.com/
Used normaly to keep sound in but should do the trick to keep the sound out. Can get pricy though.

 

Actually, if im not mistaken... Dynamat is used as a vibration dampener, and some types for heat applications. I dont think it really has anything to do with keeping sound in though. The way it works is by putting it behind your speakers and it rattles less and you get a better sound quality though out your ride.

 

naw, it is made to keep outside noise out and inside noise in...also to reduce rattling and stretching ofthe metal on your car...

 

All of you are actually right, Alot of guys with big base and loud stereos use it to keep out road noise, control where base goes and eliminate annoying rattles. I am sure there are other uses and all of you have seen some.

 

i was also looking into getting the Delta 40's from Flowmaster. I cant figure it out on the flowmaster site, and i cant find the info. but what size muffler would i need to get ? i have a 2006 2500HD w/ V8- 6.L. Thanks for your help!!

 

I think you need 3" if im not mistaken.

 

Also a good site to get them from is Jegs... I got both of my super 40's, which are similar to delta flows, were only about $130 on sale.