What Brand / Supplier would you suggest for a " Complete System " , I need everything except the Tips . Thanks, Kevin

No doubt the best mufflers and head pipes out there are the ones ECS recently introduced to the market.
https://ecs-automotive-concepts.mys...ar-t-a-muffler-chrysler-licensed-product
They sell headpipes too.
Pricy, but they offer discounts once in a while and if you can wait until the shows this summer you can likely save on shipping too.
A few years back when I was restoring my T/A I used restored tips and NOS mufflers, and bought my headpipes from Dales Cuda Shop.
I had bought a pair of their mufflers too, which as previously mentioned I didn’t end up using, they are nice looking with Chrysler part number, pentstar and date code. Still here gathering dust if someone ever wants to buy them.

Only one choice IMHO...ECS

Does anyone have a photo or know what a Trans Am muffler looks like cut open? How are they baffled? Perforated?

Side question: are the tips available without restrictors?

i've never seen one (muffler ) cut open . yes you can get the Tips with NO baffles , also fake removable baffles for car shows from ACCURATE EXHAUST.

If these reproductions are built just like the OE mufflers, then they each have a flow rate of 175 sCFM. I have a pair of NOS AAR mufflers & in 2001, I brought one of them in to work when I worked for Dynomax/Walker & we flow tested one. Our head engineer brought the muffler to my desk after testing it & said "this is a PIG!" The OE mufflers have a body length of 20" give or take an inch. Dynomax has this style muffler in Super Turbo, but they are 14" long bodies, & they flow around 425 sCFM - HUGE improvement vs the OE Chrysler muffler design. (BTW - Walker may have been OE on these mufflers to begin with anyway, but they were built to control noise - they are quieter than the Dynomax mufflers). Anyway, these Super Turbos are available in both 2.25" & 2.5" versions.