[AdvanSuper]

Are there any issues with the SW NPP catback? I can't find anything online from what this shop installing mine is telling me. My OEM exhaust was damaged in a fender bender, so the body shop is going through another exhaust shop to have it replaced and since aftermarket was cheaper I went with SW.

They said something along the lines of the valves not fully opening and that SW will be making a brand new set of the muffler/axelback and should be here in the next week or two. I can't find anything online and by the time they told me this SW was closed for the day on Friday.

I have the car back now and they left the npp valves off, so I'm wondering if it also sounds bad due to that and it also drones terribly no matter what gear I am in...

[Donner]

Please let me know how it goes; I am interested in their product.

[AdvanSuper]

Originally Posted by Donner

Please let me know how it goes; I am interested in their product.

I honestly don't think this shop knows what the **** they're doing. Lethal/Sledgehammer documented his whole process and his exhaust doesn't sound like shit the way mine does. I don't think they realize even in track mode with npp it still does close partially until a certain amount of throttle is applied. Not to mention the rattle I have is due to the exhaust hitting the bracket you're supposed to put the spacers on.... Bunch of ****ing idiots. Just very frustrated at this point.