Anyone running Stillen Headers and HFC?
 

Own a G37 and want to put on Stillen Headers along with HFC. Stillen was recommending against it due to heat and running lean. Anyone on the forum running headers and HFC?

I don't see the point into all the time and hassle of installing nice free flowing headers, only to get chocked up by HFC's. Test pipes or nothing. If you're absolutely set on HFCs, I would just stick with the stock headers.

And have you looked at the Z1 headers?

I had the stillen headers with berk cat.
now I have replaced the cats with motordyne art pipes.

z

I have the stillen headers with stillen test pipes and I love them but if I had it to do over I would have gone with resonated pipes. they are definitely raspy. but just so you know the install of the headers cost 400$ more than the headers themselves. it cost me 600$ for the headers and a thousand for the install so 1600$ for about 10hp at the wheel. it was worth it for me but that's a personal decision most people would not have done that.

Have any of you had issues with heat or CELs? Did any of you have a tune afterwards? How about the Fast Intentions Long Tube Headers instead of headers and Motordyne Resonated Test Pipe?

Rumor is there are better headers power-wise than stillen.

That may be true but I decided to stick with the same brand for all mods. I like it that way. So I know who to blame if something goes wrong hehehe.

LTH's won't allow you to run test pipes. They just run straight to exhaust hence the reason they are long and not shorties.

The stock headers aren't bad or even intake manifold.

http://www.the370z.com/nismo-370z/58...-vs-stock.html

It's nismo but it still applies to normal Z. Usually hitting google with X vs Y will get what your looking for e.g. HFC vs TP or LTH vs HFC etc...

Ok so I reached out to Fast Intentions regarding the long tube headers and their FI CBE. They say they have never done a fitment with the LTH and the CBE. SO have aanyone on this forum done the FI for the FTH and CBE?

What!?! You sure that you reached out to the right people? Of course they have done a combo of FI LTH and FI CBE. I couldn't tell you member names, but I know that in the LTH install manual, it specifically says that FI only guarantees fitment with their CBE and no others. It would be silly of them to make that statement if they have never combined the two pieces. They are a good product and should work with any known good exhaust though. I have a few different brands cobbling my exhaust together, including the FI LTH and everything fits perfectly.

What headers are you running? I am thinking DC Sports - Ceramic Coating the 304 Stainless, then motordyne Resonated test pipes and then FI CBE with the resonated test pipes to keep the exhaust somewhat quiet.

Good luck on fitment, and hope and pray they don't crack. I would go with some of the proven brands out there like Fast Intentions or Z1. Stay away from DC Sports, Megan Racing, OBX, and all the other Ebay brands.

Op.."Huck" who is one of the forum members up on here is running F.I. LTH and CBE...His Z sounds beastly with the setup. he could give you first hand information.

I have F.I.'s long tubes and non-res cbe on my Nismo. Never had an issue with heat even during AutoX events. Now that I have an oil cooler I don't even bother opening the hood in between runs.

Is the exhaust too loud? I am thinking LTH and then the 18" resonated. So you dont think I need to worry about the heat and also did you get a tune?

You will need a tune. My ECU started throwing lean codes from the upper sensors when I put them on. The tune corrected the AFRs, no more codes.

For me, no the exhaust isn't too loud. This is such a subjective issue it's hard to judge what is just right for someone else. I do experience drone from ~2000-2500 RPM, fwiw.

I wouldn't worry about the heat. I ran with the headers and cbe for a year before I got my tune. A month of that was with stillen G3's and a M370 intake. No codes were thrown during that time.

The only word of caution I have about the headers is that the primary O2 sensors are relocated underneath the car where they are more exposed to damage potential. A few months back I ran over a cone at AutoX and as it went under the car it hit the primary O2 sensors can caused both to fail. Please keep in mind though that I haven't seen anyone else have this issue.

What part of Ohio are you in? I'm in the Toledo area if you want to hear it in person. Also check out the Ohio G/Z club on facebook. There's a lot of knowledge there also.

Yeah, the loudness of ones exhaust is very subjective. I have the PPE LTH + 12" FI CBE. To me it's just right, not too loud and not too quiet. It wakes up the neighbors at start-up but settles into a nice audible rumble. The level of noise depends on how much you tip into the throttle; anywhere. And the noise will penetrate the cabin. I almost got the non-res but I'm glad I didn't after living with it for a while. Also, I don't have a tune and never got any kind of SES light :knocks on wood: