Hey Guys, new to the Forum. This is my first GN and I'm loving the car. It's an '86 bone stock as of now. I just picked up a TA49, some 42lb injectors and an Alky Kit (not sure if I want to use yet). Anyway I've been after a nice 3" downpipe and I picked one up claimed to be a Terry Houston, I trusted the seller and paid up, I'm told by someone else it's a cheap knock off, can anyone let me know what I have? Thanks guys!