OK I have all the major parts for my custom exhaust now I need to know what else I need. I have the muffler, res., cat., and all of the piping. What do I need for flanges and gaskets (all the parts listed are 2 1/4" and are S.S) and where would be a good place to buy them?

Next question, what parts are needed to make custom headers and what size piping should I use?

 

good muffler shop should have everything you'll need.

 

What we did was remove the stock exhaust and cut all the pipes down to length using the stock one as a guide. We marked the pieces with a marker and had the angles clocked and ready to go. We basically layed it out on the ground and said weld it like that. Most placed we asked wanted up to $400 to do it. We found a person that is a welder and does side work at home. He did it for $100. We took the flange for the rear near the muffler to him. One it was complete we went to a muffler shop and had them put on hangers, connect the flex pipe, and flange it to the downpipe.

Try to do as much of the labor as possible. The guy that welded it was cool, he was patient and excited about it too. It would help if you found someone also motivated because labor is what kills.

 

I don't have to worry about the welding my father is a welder and he is teaching me the trade also. What size piping is best?

 

BUMP

 

ttt

 

Someone has to know the piping size on headers?

 

your actually planning on making your own header????????? i doubt you could get the same flow quality as a OE or aftermarket one in which case you would be better using your stock header or investing in a good aftermarket one

 

I'm just doing it for fun. You never know though it might work out well (probalby not though)

 

You can actually produce BETTER flow characteristics by making your own header. Especially if you're meticulous about where the pipes merge. You can also make a few different collectors of different lengths to see what works best with your motor. I say go for it man - and be sure to post your results when you're done!

The optimal diameter of the piping depends on what you're planning to do with the car. For reference though, I can say that the primaries on a JDM ITR header are 1 & 9/16in, ID, if I remember correctly. If not exactly that size, I'm not off by more than 1/16.

All that you need is the piping, the flanges you'll weld the pipes to that will bolt to the exhaust pipe & head, and a few pieces of metal to weld on the outside of the pipes to stabilize them.


[Modified by 94gsr, 3:51 PM 8/18/2002]

 

All my cars are all motor, no boost no turbo. My test header will be on my current motor D16Y8 and after this winter I will try to make some for my ITR that's going in.