Dynomax Super Turbo Muffler confusion...

[mcvey]

I'm looking to get a pair of the Turbo Mufflers that a tonne of people seem to reccomend when the topic comes up but I'm a little confused on which ones to actually purchase.

I'm going with 3" catted DP -> 2.5" pipe to a 2.5" Thrush Glasspack -> 2.5" Y-pipe -> 2.5" i/o muffler but there seems to be two kinds of them on JEGS. One for $80~ and then one for $50~.

Would I get the

In/Out: 2-1/2''
Body Length: 14''
Muffler Size: 4-1/4'' x 9-3/4''

which is the $50~ muffler.
I'm thinking those are the ones to get but I found Dynomax 17666# those which the only real difference is that the inlset size differs from the outlet size. Is that why that series is so much more expensive?

[mcvey]

No one? It's a pretty simple question I thought.

[Bio248]

you probably want the same size inlet/outlet.

[mcvey]

Yeah I know that, I was just wondering if those are basically the same "model" even though the one with different i/o size is twice as much.