remedy for hissing sound?

TPrelude-370z

There are tons of threads that explain it, but it just boils down to the simple fact this particular motor just makes the hissing noise. The more you open up the exhaust the hiss is more noticeable. I didn't get the noise until changing out the y pipe.

With erz resonated test pipes there was no problem. I could always put the stock y pipe on to muffle it, but after feeling the difference in pickup and power, there is no way I would put that back on.

The harmonics of the engine hiss, not much you can do about it if you plan on modding the exhaust. You can get a few combinations that will not hiss. Certain high flow cat and cat back exhaust systems combine well without a hiss. I wanted to go the piece by piece route to see the power changes and sound changes from each piece myself.

I spent overall 500$ for a custom header back exhaust minus the muffler piece which I can purchase and have put on for 200$. Full cat back exhaust at the lowest end cost the same amount without test pipes and up to the mid 1500$'s for the same sound and power.

This has been a cool experience. All in all mine will be different than anyone else's and I still can play with it to eliminate the hiss. This is really what makes modding fun. If everything worked perfect the first time it wouldn't be a journey. I would be done by now unless I went forced induction.

Hoped that explained the hiss.