Yup! Package is out for delivery now... all I have to do is wait. ;)

So from reading this and a couple of other threads, this looks like a fairly straightforward DIY...would you guys concur? Did you guys just put the car on jackstands and just crept around during the install? I'm considering getting a HFC along with a Invidia Gemini exhaust. Trying to determine if installing a HFC and CBE is something I can do with just jackstands. Car is 3 weeks old, so the bolts should come off easily, just not sure if there's enough room to maneuver all the piping while taking down the stock and installing the new with only about 12-16" of ground clearance to work with.

There are one bolt on each side of cat that are EXTREMELY difficult to remove. Due the the accessibility and how Nissan decided to torture 370z owners who wish to pollute the environment a bit more than it is necessary.

(I haven't done my install yet but that's the info i got from reading HFC DIY)

Seems like hit or miss with the top bolts on each side. I've done 2 HFC installs so far. Each time the bolts did break loose with considerable force. I recommend a breaker bar with a pipe/jack handle slid over it. On the second install, the bolt broke loose but as we tried to back it out the head snapped off. This isn't an issue though since the stock cat will come right off at that point.

Some guys aren't so lucky though and have to torch/cut the bolts off. Just soak those puppies in PB Blaster the night before and hope for the best.

You'll have plenty of room with jack stands. We actually did the second install with just the front on ramps.

Do you think it'll be hard to break the top bolt loose even on a brand new vehicle? Thanks for the advise. I was more worried about having enough room to maneuver pieces of a CBE because they are longer. OK, I may have to go buy some tools...cool!

Both cars were low mileage and it still took some serious torque to break them loose. Mine had around 1500 miles on it. With the proper tools it's not hard though.

Yes... as my guy says, "They come pre-stripped from the factory!"... lol Even on my 2010 G37xS sedan that I picked up 2 weeks ago. heh

They had to use the torch on my driver's side bolt.

Other than that, install went fine. Took more than an hour though because of that one damn bolt.

I did get an SES light today though (had them installed yesterday)... P2A03... I cleared it with my OBDII scanner, and I'll see if it pops up again. Hopefully it was just a fluke, but we will see.

I guess that code has to do with one of the primary a/f sensors. AFAIK, the battery was never disconnected. If it pops up again, I'll try that.

This. I'm wondering if putting HFC's on my Nismo will even be worth it. It is a lot less expensive and intrusive than intakes or replacing the full exhaust though.

You already have an upgraded Nismo exhaust and a tuned ECU. You could do an intake, headers and/or HFC, but if you follow the theory that the first intake/exhaust mod you do will net the most results, then successive ones by small increments only...not sure how much you would gain +/- re-tuning your ECU. It will improve the breathing and clear up your exhaust path though. Interested to be the first to try it out on a Nismo Z?

[QUOTE=efuseakay;496568]Yes... as my guy says, "They come pre-stripped from the factory!"... lol Even on my 2010 G37xS sedan that I picked up 2 weeks ago. heh

First G37 installed so far let your buddies at myg37.com know about this .

Yup they know! I did have a P2A03 code pop up today. I did clear it so we will see if it comes back. If it does there may be a leak at one of the header flanges from the install. I'll update after I put some more miles on the car and break them in so the rasp quiets down a bit.

Other than the code, so far so good!

First to try HFC's on a Nismo, or the ERZ HFC's specifically? Someone else with a Nismo has got to have HFC's already... I'm tempted to buy HFC's just for the sound, but I'm waiting on my coilovers and don't want to have too many mods in progress at the same time. Also, I couldn't really do a good dyno comparison since my car isn't past the engine break-in period.

if it pop up again let me know I have even longer 02 cel fix that might work

our CNT true dual catback is coming anyone from the bay area , CA will let us test on their car (free exhaust)

I see your post on G37 thanks for letting g37 member know about this.

Welcome, ERZ! If I get the CEL again I'll let you know! Have you had any other reports of the P2A03?

Update: loose driver's side o2 sensor was the cause. I've put enough miles on the car now to say that the issue has been taken care of. Thanks for such a great affordable product, ERZ!

I'll get a video up within the next few weeks after they have broken in.

Anyone take this offer?

Lou at AMP is going to test it for us, thanks for all the interest.

Guys,

I'm planning on getting ERZ HFC for my 2010 G37 and was wondering if you had a picture of 02 bung that you had to modify? Has ERZ fixed the problem with the 02 bungs? The word is spreading on myg37forum...

Thanks,
Wiggy

I had this same issue with the HFC's I received a couple weeks ago. Pretty silly to put O2 extenders that don't fit our O2 sensors.

yep same issue here but I just took them off and put some steel wool in there and no cels to date.

So the 02 sensors are not attached and the holes are just plugged?

Thanks,
Wiggy

I just put some steel wool in the regular O2 sensor bung and didnt use the extenders as they are the wrong size and screwed in the sensors. The wool acts as a filter basically.

My extenders fit just fine have them send you new ones. :)

no need, no cels and I have about 1K+ miles on the HFCs.

True! If you aren't throwing any CELs without the extenders, you're good to go... :)

Nissangeneration, PM sent

I only have one more in stock our next version will have the 02 sensor extender already weld on as one piece instead of two piece.

I just had mine installed this morning. The exhaust note sounds good. A little louder than before. There's a rattle though. Sounds like it's coming from the front near the exhaust manifold. You can hear it when you're outside the car or with the window open. It's not as noticeable when the windows are closed. Did you guys notice this? The OP mentioned hissing and rasp...I don't hear that, but I definitely hear rattling. I talked to the mechanic and he said all the bolts were tight including the ones that go on the support pieces. No rattling before the install. Anyone experience this? Bluestyle also has a thread about ERZ HFCs, so I'm going to ask there as well.

Definitely no rattles for me. When the car is idling, there is just the low growl of the exhaust. On a cold throttle blip, there is noticeable rasp but this dies out significantly once the exhaust comes up to temp. If it's rattling even at idle, it should be easy to localize. Just start the car when you have it up on jack stands. Then crawl under and have a listen.

Just to update...problem solved. Both caps to the secondary O2 bungs (I think they're called) were loose. Tightened them up and the rattling went away. The exhaust note sounds so sweet! Thanks for your help Spearfish!

Cool, glad you figured it out. If it happens again, put some Loctite on the the threads before tightening them back up.

You some sort of Nissan rep or something? :shakes head: I'm still having nightmares from all the loctite I've fought on this car.

Thanks. Will Loctite work in high temp areas like this? I was thinking about that.

Yes, Nissan overdid the Loctite such as on the shifter knobs. However, he'd be very sorry if that 1" diameter port screw comes off completely before the cat. He'll have flames coming out into the engine bay.

Loctite and tightening the $hit out of it worked for mine. I don't plan on doing wideband tuning anytime soon. If I do, I'll have spent serious money on the car and will just get new cats if I can't get the screw out.

Standard wont but if you are concerned about it they make high temp loctite.

Good to know. Thanks guys!

Received my ERZ HFCs on Thursday along with my Fast Intentions CBE. I am really excited to get these two pieces installed as my first performance modification.

I want to note that thought I felt like a boy on Christmas, I was not completely impressed with the cats from a visual inspection. The inner tubing does not meet flush with the flange area like many have noted. From the outside it looks fine, but a little disappointing to see that even after the issue had been raised with ERZ in the past. Maybe its an unfair comparison because I had my shiny out-the-box FI exhaust from Tony sitting right there next to it with its perfectly smooth welding. I also have to note the FI was packaged with much more care.

Anyway! I am going to do a baseline dyno tomorrow morning, try to do the install during the day, then go back for a second dyno run. These will be installed together so it wont show results for purely the HFCs. Thank you to ERZ for the order and quick shipping, I am not an upset customer at all, at the end of the day its about performance for me.

Will the inner tubing not being flush with the flange area cause any problems?