Passenger side first, to the best of my knowledge it runs leaner of the two banks on this car. However, when in doubt run two.

Hey bud, hope that all is well.

Look at that, 8000 miles and no CEL. I do not expect you to get one in 8000 more...

Tony

Extra bungs are placed before the cat core and are used for wide-band tuning. You may never need them.

There are plenty of threads about this. The more of a brand's HFCs that are out there, the more likely you are to hear about CELs. Berk has probably sold the most to our community and theirs have the most CEL reports. ERZ has only sold a couple to a few of us on here, and there haven't been any CELs. FI hasn't outfitted that many of our 370Z community members, so the numbers are still relatively low to get a good feel for CELs. They make nice products with a lot of R&D though, so I imagine they've done their homework in preventing CELs. Good to know that 8k miles are CEL free for you.

Sophia you are going to LOVE the sound!

Actually we have sold somewhere between 50-70 sets of HFC for the 370Z. If you include the G37 as well as HR 350Z we have sold hundreds of sets. Those cars are different than the 370 but the engine is virtually the same. What I am getting at is that we have plenty out there.

speaking of cats, i got a CEL a bit ago thats been off and on intermittent, I'm going to try the steel wool trick and see if that works, how much of it should I use? should I pack in as much as possible, or just a pinch or two?

Bought GTM test pipes off a forum member, had the L stem for the sensor, great sound no cel, but you will get a smell in the cabin. I think the rasp is primarily caused from a 2.5 HFC/TP going into a less than 2.5" y-pipe.

So it won't hurt to get both 02 bungs? I should just get them to be safe I guess

I make the best HFC's without rasp!

Nah won't hurt, I just didn't think they were necessary though if I throw a CEL i'll rescind this statement.

I like to trail run................the trees are what makes this place amazing .....oh that and the mountains:tup: I'd really find it difficult to move and would do everything I could to stay here.


On topic: To the OP, sound quality is so personally based because your decision will be based on how you imagine the system will sound versus what the system will sound like in reality. If you want strong (friggen loud) low frequency go with minimal treatment ...(12" CF and no resonators). If you want some low frequency sound increase without rasp go with treated resonated HFCs and CF resonators...12" or 18" will affect how much low frequency noise is attenuated. The 18" will attenuate the lowest frequency noise over the 12". The quietest solution would be resonated HFC and 18" stainless resonators.

Have fun!

Thanks for that!

Has anyone heard the erz or berks or fast intentions hfc's in person? I'm looking for something deep and very loud and I don't care about the rasp.

Hey rasp is kinda good ! Lol hey sophia we are on the same boat ... I'm also looking for a hfc's but I want mine loud lol