Airisom

Hmmm, I wonder if anything else can be done to get some more power? Maybe adding h pipes between the primaries, or an h pipe after the 4-2 merge, or maybe a lextek design with tbr diameters? The latter would be a challenge without having one though.

That's still an amazing price for some dyno runs and a tune. Geez. IIRC, the shop local to me charges $400 to tune including a power commander. When I dynoed my 98' a couple years back, it was making 106.5whp with just a k&n big filter, slip on, and ngk iridium ix plugs. I think it had around 3k miles then, so the dyno test bike is running like new 👍

Or sfdownhill can just hyperlink all updates on the first post.

In for 5th gen full system. What's the muffler gonna be? I like the sound of my Delkevic 8" slip-on, so I'd like something similar with minimal baffling.

Nah, it's all good. My thought process was simple: Does the Lextek also have the indention on the rear downpipe? Nothing more than that. Two generally equal systems should perform generally equally to each other. Bashing headers to fit V8s in some cars doesn't do anything to horsepower, so one small cave-in on one pipe shouldn't do much as well. Looking at the pics, the primary indicator the BW is a BW is the indention, but since the pipes are turned around the other side in the Lextek pictures, I was wondering if there was a chance the Lextek had it as well. Regardless, they're of the same design, so performance is going to be within margin of craftsmanship anyway. The Lextek is cheaper, comes with a mid-pipe, soon to come dyno results, and a seller is willing to hook us up on a group buy, so I'm just waiting to see how this unfolds.

No, I'm just asking a question. Calm down.

Does the Lextek also have the indention on the rear downpipe?

Oh yeah...duh. I forgot it was on the mid-pipe...

So, what do you all think? Lextek or BW? Merge differences aside, both look pretty good to me. Only nitpick is the BW doesn't have a center stand bump stop.

Looks like Lextek doesn't ship to the usa. Too bad. Guess I'll wait for BW's header, but that Lextek one does look nice though.

Well, we have to start somewhere! At the very least, we need at least 10 people who are in or we're getting nothing. If we get 20 or more, then that will open up more possibilities. I want a header, so I'm in!

Well, if Gabe is back on board, then that's likely our best bet. You've already contributed a lot to header development, and picking up from where we left off seems like the best idea. Perhaps we should compile an updated list of everyone who's in? However, I believe one of the obstacles was that we were contributing to buying a header whose performance was unknown. Having just one proof of concept with some comparison dynos would speed up progress a lot. My guess is things would go 100% smoother after we have some photos and data.

Thanks for sharing the good news, keef! I am definitely interested in a full system, but I need to know cost of system and shipping from AU to USA. It ain't gonna be cheap for us over here. I would be more interested in the stainless exhaust than Titanium since Titanium will probably cost at least $2k if not more due to the more complex bends on a V4 vs. inline engines. Do we have any updates on Tyga/G-Force and Black Widow?

So, from what I've read, this is the low-down: 1. Gabe is busy making big money. 2. In the meantime, we need to raise money for a prototype header. If we need $1k, then we're $340 short according to the gofundme. 3. Once we achieve 1k, Gabe eventually fabricates a custom header. 4. RVFR dynos the header and compares to stock to get the power figures. 5. Line up at least 10 buyers to get the ball rolling. 6. Wait until Gabe is free so he can focus on the headers. I guess after that prototype is made, it's smooth sailing from there.

True Dual Headers!!! Can't flow any better than that, and our V4s might actually benefit more from that type of setup due to the V configuration (deeper sound too). Fabricating midpipes and mounting brackets for two mufflers while retaining the center stand and ensuring the dual exits are equal length would be the obstacles to overcome. Just brainstorming here. But anyway, and idea came to mind recently. Those looking for a full system could ship to you their current slip-ons (including mid-pipe) to get a custom mid-pipe fabricated for perfect fitment, at a cost of course. That would simplify the full system route a bunch since you wouldn't have to worry about making mufflers and brackets.