Keep us updated please, I would love to hear the HKS with test pipes too!

I didn't need to remove the intake from the throttle body. There were just enough room to get access to the header/cat bolts.
I have the hiss with the HKS. If you would like, I can post a sound clip for you to see if the hiss is comparable to yours.

Please do! I would like to hear it.

nevermind. I just found the other thread.

Ummm okay, I just got my FI Test Pipes in the mail. I'm getting them installed by a performance shop in the area, but the instructions talk about removing the steering knuckle. Did all you guys have to do this?????

Will do Im installing the HKS Tomorrow!



^^I hope its not as loud as it was with the ARK I mean it was crazy loud, I had hiss on my 350Z with headers/testpipes/Exhaust and it wasnt bad just a little on decel. But with the ARK It sounds like my car is turbo and not the good turbo sound, more like the one were the impeller is siezing haha.

I will post some thoughts on the New HKS compaired to the ARK hiss or any other hiss/Whistle/Howl for that matter


DAN

Question. The bottom of the stocks cats where they bolt to the y-pipe should have three bolts/nuts per side right? My drivers side has two out of three nuts there. The bottom nut is missing. But there doesn't seem to be a lot of threads showing to even put a nut in there.

I bought my car used from a forum member that out the stock exhaust back on. Just wondering if I should have three nuts per side on the bottom part....that's how it is on the 350z.

Yes, each side has three bolts. I figure that over time since you bought it the bolt came loose and might of just fallen off? I would check to see if it has a small exhaust leak, and if it does? Replace the gasket and replace the missing bolt. You can find them at your local auto parts store or a local muffler shop.

I have an extra 350z nut that fits. But it looks like the cat isn't lined up with the header properly and the bolt is çrooked. If I put a nut on the bolt I think it starts to strip the threads. I think I do have an exhaust leak at high rpms maybe. Not sure if I should mess with or replace the stocks cats completel...lol. ill post a pic.

Drivers side
http://i118.photobucket.com/albums/o...1-30121339.jpg
http://i118.photobucket.com/albums/o...1-30121357.jpg

Passenger side
http://i118.photobucket.com/albums/o...1-30121406.jpg

Wow talk about bringing a thread back from the dead haha





DAN

Are the flanges on the stock headers threaded? Or just an open hole like the rest of exhaust?

im pretty sure that one of those three bolts is just a stud with a nut on it..

Yeah, one of the top ones is a stud (you can see that one on the passender side that has a different head on it).

I'm curious if this is okay the way it is? I'm thinking that the lower bolt without a nut is actually theaded into the flange....maybe.

I know that aftermarket it's definitely 3 bolts per side.....but what about stock. I think that bolt might be all that is supposed to be there....without a nut.

Guys one other thing. Does it look like there is even an exhaust gasket in there to you???