OK fella's, I have searched this forum high and low and I just can't find what I'm looking for. I found the thread on mufflers and headers but not what I'm looking for. I am getting a local muffler shop to install a cat-back system on my 2006 quad cab hemi with a single in duel out magnaflow muffler. My question is do I have them install 2.5 inch or 3inch pipe. Any input would be great.. I have heard about back pressure and just wondering if its a myth or fact. Thanks

 

2.5" pipe

 

ok thanks... That's what i was going to go with then I saw the magnaflow kits online and they were 3 inch. Thanks for the input i'll go with the 2.5

 

If the shop installing is good you can just buy the muffler and have them fab up the piping. It will probably be cheaper. That is if you want to save some money.

 

yea thats what Im doing. The shop actually has the muffler. He said he has three to choose from, I think it was 14, 18 or 22 inch. I'm thinking of doing the 18, unless somebody can tell me different. Getting it done tomorrow morning.

 

Any will fit, I have two 14" on mine. The shorter the louder

 

Think I'm gonna go with the 18 inch muffler

 

Ok guys , got it all done today. Went with 2 1/2 inch pipe and the 18 inch muffler. Left the resonator on. Sounds really good when I jump on.it but still quiet enough inside not to drive the wife nuts. Muffler guy said I can come back and take the resonator off to make it louder if u want. Very happy with the results, will post a sound clip later. Thanks again

 

Sweet.

 

The 18 was a solid choice for the wife and kids from what I heard, its a good inbetween. Taking the back resonator (I forget if its only the 08s or 06-08s that have a front and back res) will give it a deeper rumble for sure