ERZ Performance High Flow Cats, Install and Review Thread

[chops]

Originally Posted by djpathfinder

Did you install HFC's too (O2 bungs)? If you only have CBE, it is highly unlikely you'll get a CEL.

sorry, i have a stock nismo with newly added erz hfc's now. exhaust sounds awesome! i think i may have forgotten to tighten the O2 sensor's so thats whats causing the rattle. will check it out later

[djpathfinder]

I can tell you that's exactly the cause of my initial rattling too...I have ERZ HFCs as well. The plugs are just hand-tightened when shipped, so you need to get under there and tighten them up. They will loosen quite quickly with a bit of driving otherwise, so don't wait too long to do it.

[PR370z]

My ERZ/CNT HFC's have been on for over 1k and I love them and have no issues (CEL). However did received them with one of the O2 dummy plugs missing. Got a hold of Nissan Generation and John sent me a replacement quickly. In conjunction with my Y pipe my car feels faster (butt dyno) and the sound is just right for me (not too loud but not to low).

[chops]

help! first day driving it for a lengthy period and ive noticed a rattle? i went down and tightened the extra O2 bung caps, and now the idle rattle is gone. while i was down there i knocked on the hfc's and noticed another rattle somewhere in the H-pipe. i removed the heatshield clamps, and out came a few rocks that were rattling in there. no more rattle...or so i thought

started it up and here's another rattle! see the below "video". its more like a sound clip, but theres a weird noise. ive loosened all the bolts and re-situated the gaskets, and retightened them...yet im still getting this disgusting sound! its pretty annoying and ricey sounding. could it be a leak somewhere? should i buy new gaskets?

YouTube - IMG 0347

[spearfish25]

Hard to say with my iPhone speaker but it sounds like the typical decel hiss. Is that with the engine fully warmed up? The HFCs make the decel hiss much more noticeable. Just the nature of the beast.

[chops]

Originally Posted by spearfish25

Hard to say with my iPhone speaker but it sounds like the typical decel hiss. Is that with the engine fully warmed up? The HFCs make the decel hiss much more noticeable. Just the nature of the beast.

yes, fully warmed up engine. it just sounds nasty when you're at WOT. otherwise it sounds awesome when slowly giving it some gas

[djpathfinder]

Yup, deceleration hiss is normal.

[spearfish25]

My HFCs had some nasty rasp for the first week or two. It settled down tremendously after a few heat cycles. Now I have a hint of rasp when listening outside the car if things are cold. On a hot exhaust, I only get compliments on the sound. Give it a little time to settle in. If it's still bad in two weeks, call ERZ and complain.

[chops]

Originally Posted by spearfish25

My HFCs had some nasty rasp for the first week or two. It settled down tremendously after a few heat cycles. Now I have a hint of rasp when listening outside the car if things are cold. On a hot exhaust, I only get compliments on the sound. Give it a little time to settle in. If it's still bad in two weeks, call ERZ and complain.

alright...ill report back within a few weeks. if the rasp continues i will likely take them off :\

cant stand the ricey-ness when revving high

[GZ3]

any dynos on these yet?

[chops]

Originally Posted by GZ3

any dynos on these yet?

unfortunately i dont think anyone has, yet. depending on the rasp/hissing issues im having (ie. if they go away) my next mod will be an uprev tune since im fully satisfied with the current power/sound of the nismo exhaust/ERZ hfc. will have dynos then!

on that note...i got the CEL today "service engine soon"

wont be home for another hour to pull the code though.

[chops]

anyone have issues with constant CEL's?

i got my first CEL a month ago - catalytic converter efficiency bank 2. ive since cleared it, stuffed in varying amounts of stainless steel wool, and no fix. if im driving in the city, it seems to hold up, but freeway driving causes the CEL to come back almost guarenteed. i keep my ODB2 reader in my glove box just to clear it...but its getting old.

[kielbasa16]

Originally Posted by chops

anyone have issues with constant CEL's?

i got my first CEL a month ago - catalytic converter efficiency bank 2. ive since cleared it, stuffed in varying amounts of stainless steel wool, and no fix. if im driving in the city, it seems to hold up, but freeway driving causes the CEL to come back almost guarenteed. i keep my ODB2 reader in my glove box just to clear it...but its getting old.

I didnt get 1 CEL for the 2k miles or so I put on the HFCs before my UpRev tune. I think, but am not sure, that the tuners do something to eliminate warning lights from the O2 sensors.

[djpathfinder]

Originally Posted by kielbasa16

I didnt get 1 CEL for the 2k miles or so I put on the HFCs before my UpRev tune. I think, but am not sure, that the tuners do something to eliminate warning lights from the O2 sensors.

Yes, that's also another option if you're going to get a dyno tune. They basically program it so that the ECU ignores the O2 sensor input at the HFC so you won't get a CEL because of that anymore.

[djpathfinder]

Some HFC users encounter recurring CEL b/c of the O2 sensors. In that case, you may need to get the O2 bung extenders, and then stuff steel wool in those.