OK, so after cutting the sidepipes apart I found out they were pretty standard glass packs but the big news is they only had a total of an inch and 7/8 worth of hole to get all that big block exhaust out. No wonder the car stopped pulling at 5500 RPM.
I went to the local muffler shop and they cut the glass packs out and put in the Moroso Spiral Flow mufflers. The workmanship seems excellent but I won't know for a couple of weeks at least as the engine is still in the shop. I hope they fit the car and I hope for some bad ass sound.
Scott...
