[adam83]

Hello,

can some one tell me if this is a stock or aftermarket exhaust? This picture is from underneath my 88gt

[ekim7971]

it looks stock to me only because of the h pipe but again you can buy aftermarket h pipes but usually there should be some sort of manufacture stamp on the muffler some where also if it is stock it cant be to old

[milford]

there not stock mufflers for sure.........they look like mac,or dynomax....but theres alot of look alike and sound alikes out there..as for the H pipe cant really tell from here.but if it has 4 cats it is stock

[blackmust5.0]

The mufflers look like Flowmasters.

[idontshift]

you would def know if it was a flowmaster....they say flowmaster on one side in HUGE letters..lol usually if you dont know if its stock or aftermarket...just listen to it..you can usually tell cause a stock exhaust has a quiet yet low rumble to it, if its louder then that its aftermarket. if that made any sense to you..also look at the hangers, wether it looks good or wether it looks like somebody welded it.

[EagleAutosports]

They're not Dynomax or Flowmaster. Those are MAC Flowpath mufflers and pipes. I can see the coating they have.