I was looking at the set of Nismo headers I just got and I noticed that on each bank where the three pipe's collect. That each one of them (each of the 3 pipes) had a nasty weld bead in the flow path. And several of the ports at the flange were not as smooth as they could be.

I snaked a dremel on a flexible shaft into the collector and cleaned all the pipe welds up and I smoothed out any port that needed it.

Did anyone notice if their Nismo headers had what I'm talking about?

 

you got the ones from NISMO USA or NISMO Japan?

 

mine where not a problem..it was just that i need to bang one of the weld spots to get my steering shaft clear of it....

plus...one of my techs said these looked like it was made out of alumium and not SS....??

 

Thats a good question, I bought the headers used. They came off of one of EVO350's race cars. So I don't know the answer.

 

I'd PM Dwnshift and ask him.

 

most likely the U.S. version, made by B&B.

 

Correct those are made by B&B which is doing the headers for Nissan Motorsports/ Nismo USA

 

you should see the JDM ones - works of art

 

Will those fit on the US Spec Z? The NISMO Japan Headers that is.

 

have not fitted them myself yet - my guess would be yes though, given that the Fujitsubo's fit

 

To Greddy 4777,

How much did you have to indent your headers? I am having the same problem. They have been indented; however, when I accelerate on a hard right-hand turn, I still get vibrations.

Can you help me on this one?

Thanks

 

Pics? Last time I checked there were no Nismo Japan ones, only the US made ones.