FI HFC's - First Impressions
#17
It's most noticeable for me on deceleration esp when I decide to pop it into neutral and coast to a stop.
The hiss will be slightly diff with diff exhaust setups too.
Your best bet is to ride in a G that has HFCs.
If I had to do it again I'd still get HFCs.
#18
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^ thanks guys appreciate the input, im a bit wary about the sound which is why i havent yet gotten the HFC but now that im looking into getting a tune the shop told me that HFC would yield much better results. i am trying to find someone who has HFC on the G sedan in the area. thanks for the input though!
#19
^ thanks guys appreciate the input, im a bit wary about the sound which is why i havent yet gotten the HFC but now that im looking into getting a tune the shop told me that HFC would yield much better results. i am trying to find someone who has HFC on the G sedan in the area. thanks for the input though!
#20
good to know.. I have a stock car now, and was going to get a tune, but I figured I'd gain more with some kind of mod - it seems like HFCs are the best thing to do first, then cat back exhaust?
#21
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I got FI HFCs and the only time I hear the hiss noise is from 5K to 5500. Not terribly annoying but it is there. I was expecting the car to be louder after install but they did get a little louder after a few weeks. I am very happy with mine and would do it again. I would recommend getting all new oem gaskets especially between the header and cat so it will save you headaches down the road.
#22
HFCs are def a great place to start.
#23
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I got FI HFCs and the only time I hear the hiss noise is from 5K to 5500. Not terribly annoying but it is there. I was expecting the car to be louder after install but they did get a little louder after a few weeks. I am very happy with mine and would do it again. I would recommend getting all new oem gaskets especially between the header and cat so it will save you headaches down the road.
#25
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It only comes with the ypipe to cat gasket. You must reuse the header to cat gasket or buy a new one. All the after market dealers do this its not just FI. I got them from Infiniti dealer $55 for all 4 gaskets that price is BS but I havent had any problems so far.
#27
I just drove around today after the FI HFC install. What a difference! I also installed two new O2 sensors for safe measures. Performance was smoother with a noticeable deeper sound. At WOT, I felt a difference from the Mid to the Upper Range band of the RPM's. It was fun especially at the 70 to 90 MPH range. No complaints here.
#28
On my order, FI gave me gaskets for the front and rear, along with the bolts and a free Got Exhaust License Plate.
#30
Yes I did get them from FI. They were 500. They appeared to be white, so I would think that they were metallic with a ceramic coating.
Last edited by johnblaz2000; 05-07-2011 at 08:44 PM.