ok..i have never bought a muffler online before, i've always took it to the shop and let them do their thing..so i'm thinking of getting a thrush welded for my 93 dak sport...3.9..2wd..if i measured correctly the y pipe is 3 inches, then it goes down to 2.5 from the cat-back..so first i guess i'll need a 2.5" inlet and outlet.is this correct??..next i see on the jc whitney site that there are three different options..the first doesn't seem to specify..the second says Inlet: side in...the next says..Inlet:center out..what does this mean??..i plan to remove my cat..(i know, i know).run straight pipe to the thrush, then into factory shape tailpipe.so i guess i just need the right muffler to replace a pretty much factory design exhaust(minus cat).any suggestions as to which i need??

 

Posts links of exactly the muffler your looking at.

 

http://www.jcwhitney.com/thrush-weld...DetailTabPanel

click select options

Product Number: 29761G

 

can anyone help me with this?

 

You can get good diagrams and specs for the factory layout going through the 'info' tabs in the online catalog at RockAuto
Looks to me like you need a 2 3/4"center inlet and a 2 1/2" offset outlet, I'll try linking an example...
http://info.rockauto.com/Walker/Deta...2511-12495.jpg

 

If you measured 3in before the muffler why do you want a 2.5 inlet?
As for those few terms, I'm not to sure, call up JCW and ask.

 

thanks gezn2 and crazy