Generally not . . . there are many websites and walkin stores selling them. Illegality comes from how loud your exhaust noise is. (Your State or local government might ban their use . . .)
Glasspacks are illegal in NY
depending on the year some impalas have 6 inch glasspacks
OOOHHH yeah!
The longer the length the less the sound, and they son't burn out as quickly...
true duals with 24" glasspacks no cams. loud and sounds good
no
Its a small exhaust probably 2 1/4" single with glasspacks. But I think they dub the sound in.
Any type of glasspacks from cherry bomb or thrush ar Flowmaster Super 10 series
a v6 will never ever sound like a 454 . and why would you want it to anyway
If the car is equipped with a catalytic convertor, the cat MUST be in the system, There isn't any regulation about the type of muffler but there could be local laws about noise.
Everyone's version of "nice" is different. Generally, low backpressure glasspacks tend to give a nice, deep rumble. The amount of sound is dependant on the length of the glasspack.
No, it is not illegal. No, it is not illegal. No, it is not illegal. No, it is not illegal. No, it is not illegal.