I want to replace the stock cats but i do not want it to smell, i assume that test pipes smell and high flow cats dont right? are there any test pipes that you guys have that do not emit the smell of fuel?

 

I am also wondering about this...

 

its not the test pipe that emits the smell... its NOx and sulfurs that you smell, that a cat would otherwise break down. Without a cat, it will smell, and even with a HFC, there will be some smell. Test pipes are illegal....you'll have to swap back stock if you want to get an emission test done. thats about it. test pipes make more power usually, are louder and raspy.

 

TP's if your going for performance, HFCs if you just want a boost in power and want to pass emissions without re-switching to stock.

 

when would i ever want to pass emissions? like when would i have to take the test?

 

I would recommend Testpipe over HFC. You'll get the same performance gain (HP) but it is cheaper to use testpipe and you will have a deeper sound.

DOn't worry about emission for now since you have 5 years before you have to smogcheck your car again.

For testpipe, i would recommend:

1. Strup
2. Topspeed.

 

do those two not rasp so much?

 

In my case, i don't have that problem. You will see a MIX review of "rasping" issue. Even with HFC, you still have rasp. Price range for HFC in the $300-$400 while testpipe in the $100-$200. Half price. Same gain. Deeper sound.

 

but how about the smell?

 

it will goes away after 500-1000 miles.

 

its not just the smell of uncleaned gas fumes or wahtever?

 

the gas fume smell will goes away. Even with HFC, you still smell it unless you buy an "USED" unit then you don't have to deal with it.

 

test pipes will cause you to run a lot leaner than hfcs will...........if you're doing other stuff like headres and such and no tune, i wouldn't run test pipes

 

Is there a way around getting the SES light when you run test pipes? I'm interested in running test pipes, but I don't want to stare at a SES light all the time.

 

spark plug non-fouler trick

or buy an 03 model, they don't have that problem most of the time ^_^

 

after few thousand miles, SES is gone. My SES is not on for awhile now. My car is 05 btw.

 

I just hollowed out a psare set of OE cats and bought the non-foulers for $15 at Kragens autoparts...I should install them within the next few weeks (as soon as work lets up). From what I hear, the non-fouler trick works well.

http://www.*********.com/zwiki/Tutor...ith_Test_Pipes

-Peter

 

http://www.*********.com/zwiki/Tutor...ith_Test_Pipes

 

sorry, the link isn't working...I attached the pdf of the website.

 

Replace the ****** with 350z - tech.com No spaces in the address.