I have test pipes and a nismo exhaust on my car and over the break i had to fix a cracked weld on my test pipe. I did and mentioned it to a buddy who races them and he suggested i make a brace for them because he had the same problem. I did and a weld on the nismo exhaust broke a few weeks later.
Any ideas?
Thanks

 

Add some flex pipes???

 

No, I think the NISMO exhaust is cat-back. They have been known to have problems with their y-pipe. OP, what part of the NISMO exhaust's weld broke?

 

Things will break at stress points.

If the test pipes or cats crack, there was a stress point at the test pipes or cats. Repeated thermal cycles and stress cycles caused material failure (this is always the case).

By introducing a brace that is not correctly designed, you will create a stress point somewhere else (such as in the cat-back portion of the exhaust). If you create a brace that is properly engineered, it will eliminate all stress points.

 

The brace i made was a copy of the one spl parts has on their 350 racecar but as an update i added flex joints to the test pipes in front of the brace and it has solved the problem so far.... i have had no problems out of it since

 

This thread needs some photos.

 

Hmm. I had never heard of a Nismo having any issues like that. Mine had zero probs.

 

get APS, strup, or turboXS test pipes. theywont crack.

 

There are other threads here about Nismos Ys cracking with Crawford HF cats and some test pipes. It was a hot topic about a year and a half ago. Later Nismo systems have a small gusset at the Y weld, I imagine this was to try and combat this issue.

Chris

 

^^Interesting. I had mine with the Kinetix cats and had zero issues. Maybe I just got lucky.