If this exhaust sounds good, makes 14+ whp, and does not have tips that stick far out, THEN I WILL PURCHASE IT ASAP.

Please BERK make this a good one!

It needs to make at least +20whp before I'll even consider it. But I already have a CBE, so my perspective is a little different than it'd be if I still just had the stock exhaust.

semtex, Stillen claims on their website that their CBE yields 18 whp, yet others claimed 37 on the GTMotorsport's exhaust thread. Did you dyno with just the CBE to know the difference between that and stock?

37?? Who claimed 37?? Where is this?

I found this over in the GTM group buy thread. Is this the source of the +37hp?

If so, I need to make a few things as clear as possible. I've already stated these things in my own thread(s) on my results. In fact, I've even embedded these clarifications right in the first dyno video I made. And it also appears that these clarifications were discussed right in the GTM thread. But here they are again:

• I never did a baseline dyno when my car was bone stock, so it's impossible to say definitively that I gained xyz whp over stock with whatever mods.
• The 254whp figure comes from another 6MT 370Z /Sport, dyno'd right before my car, on the same dyno. But it is not the same car, so at best, this figure can only serve as a rough approximation baseline.
• I installed the Stillen CBE and Berk HFCs at the same time, so I do not have separate numbers for these two components.
• If you use the 254whp number as an approximate baseline, then my 291whp figure appears to support the dyno results that Stillen claims for their CBE (+18), as well as the results that DDM got for the Berk HFCs (+19).

When you look at the totality of circumstances, I think the +37whp 'gain' my car supposedly made must be taken with a HUGE grain of salt. We certainly cannot claim that the Stillen CBE alone made +37whp. There's just no way.

I hope this clears up any confusion.

Thanks for the clarifications semtex. And there is also the possibility your car had more than 254whp, and therefore the gains could be even a little bit smaller.

And anyone that believed it needs some serious help

Oh definitely. In fact, my assumption is that my car made more than 254whp when it was bone stock. Because think about it, if I really gained a combined +37 from the CBE and HFCs, then that means that ricer math actually worked (18+19=37). But it's called 'ricer math' for a reason -- gains seldom work that way. As one adds more mods, one should expect diminishing returns.

On the other hand . . . after I added the Stillen G3 intake and went back to that same dyno, I pulled 306.4whp, which is a gain of 15whp. Stillen claims 17.5whp for these intakes. Now, Stillen uses a DynoJet, whereas my gain of 15whp was measured on a DynoDynamics, which usually measures a little lower than DynoJet. Point being, it would appear that ricer math did in fact work when I put the G3 intakes on. So I don't know what the deal is with my car. But I'm not complaining. ;)

Aparently you're a ricer then... :D

^ LOL. Yeah, thanks dude. I've been trying to figure out a rice way of mounting that GTSpec subframe brace that I ordered from you last week. Any suggestions? I was thinking maybe I could steal some wheels off of a shopping cart and mount them to one end, then mount the other end to my rear bumper so that it looks like some sort of wheelie bar. :inoutroflpuke:

:icon18:

I can't even think of a reply to that one.

It's worth a Photoshop job!

wheelie bar FTW. as 370 owners, we all need this. its a PITA just to keep my fronts on the floor

Please DD, PICTURES....MOAR PICTURES!!!

lol, I dont have any more. I am a 4.5 hour drive away from Berk Technology :(.

More pics!

The DoubleDown Motorsports 370Z having relations with the Berk 135i.
http://i183.photobucket.com/albums/x.../atsa00001.jpg

The midpipe.....
http://i183.photobucket.com/albums/x.../atsa00000.jpg

The rear muffler section, the exhaust is a dual exhaust. The 370Z has some unique packing requirements that requires us to package the mufflers this way. There simply isn't enough room to do a / \ config. They need to be stacked in a = configuration.
http://i183.photobucket.com/albums/x.../atsa00002.jpg

Y-pipe prototype #1. True dual setup without the H or siamesed X pipe. Those braces are just support braces to hold the y-pipe's pipe spacing. They will not be on the production exhaust. We figured out why some aftermarket exhausts hit that chassis brace. Took some brain storming but we finally figured out what Nissan had designed into the OEM exhaust to keep the exhaust up high in that area.
http://i183.photobucket.com/albums/x.../atsa00005.jpg

And the best picture of all..... Broke the head off the tig torch which cut work short today. Gotta pick one up tomorrow morning..... :crying:
http://i183.photobucket.com/albums/x.../atsa00009.jpg

Ahhh I'm at work and can't see the pics...DAMN!! I'm pretty stoked to see how this all pans out. If it yields the same or more hp as Stillen and sounds deep without any drone or rasp, I'm going with Berk for the CBE and HFC!

How is the weight of this exhaust adding up? Slightly less, significantly less?

:owned:

Glad mine is in the dominating position :D

Thanks for posting pics!

I thought Berk was using mild steel for the fabrication, and then when the dimensions are correct, they will be producing the final version of the exhaust in 304SS?

Berk, care to hop in here?

^^Thats correct.

Darn was hoping for the \/ type muffler position out the back for that aggressive look.. Other makes are doing it? Maybe I'm confused.

Yeah I think GTM is offering that configuration.

I personally like the parallel setup, so I'm still all thumbs up!:tup:

+1, plus its a bit more aerodynamic than the \/ setup. The \/ setup essentially makes your rear bumper a parachute lol. Not saying that the parallel setup is crazy aerodynamic, but its more so than the \/ setup. Every little bit counts :D.

That's what I thought. Thanks sir.

Hmm this is interesting. I like the fact that they're putting flexible joints in the Y-pipe like stock, that's got to reduce the resonance of the whole thing, which I suspect would make for a cleaner sound. The lack of any sort of crossover between the sides seems odd to me though. I thought there were usually benefits to having some variety of crossover configuration, even on a V6 application (although not nearly as necessary as on a V8).

They are going to test this configuration, X-Pipe, and H-Pipe. They just haven't gotten that far yet.

Yeah sorry I failed at reading through the whole thread first ;)

Maybe I am missing it, but what was it that you found? Was it simply the flexible joints?

They probably don't want to tell ;)

I'm sure Berk doesn't want to tell everyone their secret but I don't care. I just don't want my exhaust bouncing around on every piece under the car.

Hey Mike, I visited your car yesterday, the bimmer needed some lube :icon17: j/k the exhaust is looking good man, cant wait to hear what it sounds like :tup:

^^Oh nice!

Hey I am going down to Forgestar Monday afternoon.

Checking up on 18" wheel fitments?

Yep. Going to see if an 18x10 fits up front and also to double check and make sure they will all clear the sport package calipers.

Awesome. I assume you will post the findings in the 18" Forgestar thread?

Of course

Some more photos from Berk! Mock up version is done! The production version will look largely similar except its my understanding that the hangers will be re-worked a bit to look better and obviously the bracing used to hold the exhaust into position during mock up will be gone. And I believe we will still be testing true dual/X-Pipe/H-Pipe configurations later on.

http://www.doubledownmotorsports.com/berktech19.jpg

http://www.doubledownmotorsports.com/berktech20.jpg

http://www.doubledownmotorsports.com/berktech22.jpg

and I j**z in my pants