no, the industry calls them catback exhaust - meaning from the catalytic converters all the way to the exhaust tips.

stock catalytic converters are by far the most restrictive part of the exhaust system. stock cats are for vehicle emissions.

replacing them with high flowing cats or test pipes free up a lot of power that is otherwise sufficated by the cats. your not really adding horsepower, your actually unleashing the power that is already there by a free-er flowing aftermarket setup.

so ultimately by replacing the cats w/ hfcs and a good catback along with a good cold air intake you are making it easier for the engine to breathe...better breathing equals more horsepower to the ground. and as a added bonus a much much better sound out of the exhaust.

Nope, I'm waiting for the Stillen Gen3 intakes, which should be out in a few weeks. They dyno'd them to produce +18whp. The cat-back exhaust also dyno'd +18whp. And the Berk HFCs dyno'd +19whp. Obviously, you can't just add the numbers together to get a grand total; I know it doesn't work that way. But still, putting the three of them together should yield some pretty sweet results!

Agreed, 100%. Spiderman -- a cat-back exhaust is so named because it's from the cat, back. As in, from the back of the catalytic converter(s) onwards. A cat-back exhaust alone will yield significant results. But to go the extra distance, some people also replace the stock catalytic converters with either high flow cats (HFCs), or test pipes. Test pipes are essentially just pipes with nothing in them. In other words, you're taking out the cats entirely and have nothing to filter out the pollutants. Test pipes are not street legal, fyi. Not that I have anything against them per se. I had Kinetix test pipes on my 350. But this time around, I've decided to go with HFCs and stay 'clean'. Think of HFCs as a compromise in between full-blown test pipes and restrictive stock HFCs. Stillen does not currently have HFCs available for the 370. However, Berk and Kinetix do. If you look at the thread on the Berk HFCs, you'll see that they alone yield up to +19whp, and they alone give you a much nicer exhaust note. Here's the link to DD's group buy thread, which includes the dyno results and the sound clip video:

http://www.the370z.com/drivetrain-en...group-buy.html

I've decided to get both the Stillen exhaust as well as the Berk HFCs. That should really open up the sinuses, so to speak. Then once I get the CAI put on, we'll really be in business!

Thanks very much for everyone's feedback, I appreciate the help! It's what I thought but wanted to make sure. I was thinking of the same set-up based off what I have been reading semtex. Quick question .. at cruising speeds, will adding the Berk HFC's be too loud combined with the Stillen Cat Back?

*Shrug*... I doubt it. But really, that's a subjective question that I can't answer for you, at least not definitively. What might be just fine to me might be too loud to someone else, right? It depends on individual perception.

Awesome. I wonder how much weight they drop over the stock setup.

Semtex,

Are you going to dyno your car after the mods are in place? I'd like to do the same setup but am not too committed until I see the results/benefits. Perhaps one of the Venders who sales all the parts can do a dyno session and post the incremental results...........might motivate some additional purchases?

I'd really love to hear some clips of this catback with the berk hfcs. Semtex, gonna break out the video camera for us? :D

Well even on previous cars I have driven such as G35's and 350z's which had the Stillen dual with test pipes, sounded great and were not obnoxiously loud and drony as other exhausts.

In my opinion it will not be drony with the dual and hfc's. It should sound awesome:tup:

With the stock exhaust and the HFC's our 370z sounds great when you get on it and stock when you are cruising. The Stillen won't be too loud

Been thinking about this, actually. Problem is, I don't have a decent video camera. One thing I've never really gotten into is taking video. I have an old Hi-8 camera that I hardly ever touch. I could use it, and it'd take good quality video -- but how do I get it from the tape into the computer? Do modern cameras use SD cards or something that I can just transfer files off of like a digital camera? Oh wait.....my digital camera takes video. Maybe that's all I need to use? Not sure how the sound quality will be though. I guess I could experiment later and find out.

Not sure if I want to go through the hassle and expense. I guess I can look into it. I'm not even sure where to go around here for a dyno.

Is this whole exhaust 304ss, or just the tips?

I'm assuming the whole exhaust is, but I want to know for sure before I go dropping 1500 large on it.

Ditto. Any installed pics from different angles?

Exhaust is 409 stainless, tips are 304..

Price currently is $1,260 with $9.95 shipped anywhere in the 48 states

Yeah i think the stillen tips would be much more attractive if they were shaped to the body.

Awwwww

I honestly don't understand why some of you are making such a fuss about angled exhaust tips. Even the Nismo exhaust doesn't have angled tips. Here's a pic of Minicobra's Z, and he has the Nismo exhaust. Don't get me wrong; angled tips would be a nice touch. It just seems like such a minor, petty little thing to be griping about to me. Want some cheese with your whine, guys? ;)

Having said that though -- Josh and/or Kyle, do you guys have a side/quarter shot like the one below of the new Stillen exhaust? I think it'd help a lot of guys out to see it from that angle.

http://www.the370z.com/members/minic...arter-shot.jpg

Yeah, I prefer these tips to the stock angled ones. :tup:

Now, one thing that I am a little iffy on is how far the tips of the Stillen exhaust jut out. If you look a the video on p.1, it looks like they come out further than the Nismo or stock. It might still look okay, but without a side shot, it's hard to tell. Of course, I've already taken the plunge with ordering one of these, so I guess I'll find out soon enough! Would still be nice to see a side-angle pic though. If all else fails, I'll post one after I get mine installed for everyone else's benefit.

Are they adjustable? My Mustang's were, but then again that car had mid-mounted mufflers.

I doubt they're adjustable. I had a Stillen exhaust on my 350 and don't recall it being adjustable.

Yeah, most likely not. I'm sure they're fixed.

I have to get on the ball here... I've starting to get left behind as far as mods go ;)

Is the 18whp gain claim including tuning or is that just bolted up with 0 tuning?

0 tuning.. and yes this is a bolt-on system, utilizing the factory hangers, everything you'd expect. As with most bolt-ons of this nature, tuning will only stand to have additional increases, depending on the combination of the parts installed, and of course the tuning.

We've had extensive R&D time on the Z's and G's, and put that knowledge to the 370Z. 18hp is a significant gain, and was achieved through exhaustive testing, and the knowledge of these cars/engines.

Josh,

Any chance of an angled tip version coming? This may seem insignificant to most, but if I'm going to spend the money for an exhaust, I'd want it to be exactly to my liking.

Being that these tips are welded on, and require preparation to ensure exacting production standards, having a ton of tip options can create additional inventory that can drive cost up.

That being said, we appreciate the feedback on an angled tip (which we have done with all previous Z exhausts), and Kyle and I have had plans to sit down in our next meeting and discuss an angled version, based upon several of your feedback.

If those of you who have interest in this style of tip could let us know, that will help things along.

I personally like this tip, which is unique to this exhaust, but we are absolutely open to ideas.

Thanks for posing the question. And no, it's definitely not 'insignificant'.. it's actually most of what's visible from the exhaust from anything other than a lift.. :)

The rear factory fascia cutout is an oval with the stock exhaust tip being oval and angled. The design is excellent and flows with the vehicle's line. NISMO's tips are round, and not oval, like Stillen's. I would like to be able to have the factory oval/angle tips on the Stillen; can locals do that?

does anyone have this catback installed and can take some pics for us so we can see multiple views of the tips please.

I already asked Josh to post some pics from different angles. Josh, can you do that for us?

Josh is soooooooo witty hahaha. I think that was an accident but just seemed funny to me...

NISSAN only loaned us the car for a few days so I'm not sure how many different angles our photographer was able to get. Josh and I will go through the image library and see if we have a similar shot to the one posted previously.

Also, I don't know the exact weight savings but I want to say that it's something like 10-12 pounds. I'll have to check with our engineers for that exact info.

Both the mufflers and the tips are polished 304 stainless steel.

I got the Stillen exhaust installed last night, along with the Berk HFCs. I'm working on getting some video clips together and will post those separately later, but for now, here are some pics, because I know many of you are eager to see how the Stillen exhaust looks from different angles:

http://www.the370z.com/members/semte...4-p1000741.jpg

http://www.the370z.com/members/semte...3-p1000740.jpg

http://www.the370z.com/members/semte...2-p1000739.jpg

http://www.the370z.com/members/semte...1-p1000738.jpg

http://www.the370z.com/members/semte...0-p1000737.jpg

http://www.the370z.com/members/semte...9-p1000736.jpg

http://www.the370z.com/members/semte...8-p1000735.jpg

http://www.the370z.com/members/semte...5-img-2264.jpg

Is it me or is the right side a bit lower the the left side???

It's a smidge lower. We tinkered with it for quite some time trying to get it perfect, but in the end this was the best we could do and I declared it good enough. (It was 12:30am by the time we were done.) I just added 1 more pic, btw.

:drool::rock::cool:
DUDE, that is straight up SEXALICIOUS!!!

any initial feel/driving impressions yet?

Great photographs showing how the exhaust tips are situated. They are not shin-busters, and that's a good thing. Nice.

Thanks for the pics; looks amazing. It doesn't look like it sticks out as much as it appeared on the Stillen video, so I like.

+1

This is the exhaust setup I was thinking of doing. How does it feel?