I recently bought some Motordyne ART pipes used so I don't have hardware. Getting ready to install but am missing some hardware. I've already purchased the 3 bolt Z1 gaskets (cat to header) and replacement OEM 2 bolt gaskets (cat to y-pipe). The only thing I don't have is the bolts and nuts for the cat to header side. Does anyone have the specs of the nut and bolt sizes for the 3 bolt side of the ART to header side that need to be used? Thanks in advance.

 

 

First off the ART pipes use the oem ring gasket and you should NOT be using the z1 gasket for the header.
second take a pipe with you to hardware store find stainless bolts that fit in the hole and correlating nuts. Make sure they'e stainless. For one bolt on each side you reuse oem nut as the stud is on the header not removable for install so you just need 4 bolts and corresponding nuts. Get bolts and nuts with 14mm or so head.

 

I notice you just listed yours (ART pipes) for sale in classifieds. Mind me asking why you're getting rid of them so quickly? Also curious for the reasoning for not using the Z1 gaskets and what is the intended purpose of the Z1 gaskets?

 

ART pipes use the oem ring gasket pictured. No other gasket goes on.

 

I'm planning on going back to single tomei and too loud with test pipes or hfc for my liking.

 

Ahhh, I see. Thank you! I'll have to take a look at them when I get home now. Don't be surprised if you see an ad for (2) Z1 header to cat metal gaskets in the classifieds soon. (they weren't cheap either).DOH!

 

no problem. They actually don't seal very well either. Too thin. Glws. Good luck with hardware shouldn't be too difficult as your basically choosing bolt and nut that fit through the pre drilled holes in ART pipes.

 

Any suggestions on getting them to seal up better? How'd you get yours to not leak?

 

I had ARTpipes so I didn't need them. They came with z1 hfc I bought and I bought different gaskets for them.

 

The FSM shows a gasket between the cat and header. I'm confused.

 

What car do you have?

 

I'm beating a dead horse. That fsm shows 350z DE or g35 with the DE. The 07-08 g and Z with the HR have ring as well as all g37 and 370z. So with that said.

 

It's a '12 sedan. Sorry if i'm killing you here.

 

Gotcha so the FSM is incorrect is what you're saying. Thanks.