I recently purchased an 06 coupe used and I bought some Ngk iridium plugs for it and when I took out the first plug they were already NGK ididiums in great condition! So obviously the previous owner who was some middle aged lady must have had a son or husband that did some thingsto the car. Now on to my point for this post. I always thought my G sounded louder than any other stock G I drove near or heard take off and when I found these plus I started to wonder if maybe they put in some aftermarket cats. I checked under my car and they look stock but I noticed the crawfords look like stock also. Anyone know an easy way to tell between stock and aftermarket? I am curious because if they are not HFCs I am going to get some but if they are I can use that money for something else. Any imput would be appreciated! Thanks!

 

Put some pics of your cats up and then we can give you a straight answer.

 

pics...

 

That would be a good way to determine wouldn't it haha. Alright I will add some tommorow when I have sunlight. Thanks