Catback pics added to page 1…
http://audirevolution.net/forum/index.php?topic=3145.msg91290#msg91290
The more I keep looking at the first posts the more I keep being reminded of just how big a project this is.
I’m posting this just because it’s awesome. Great exhaust system
This car is going to fucking sound glorious!! I’ll unfortunately probably never hear it in person.
Hahaha… that’s what I am hoping
Where are you located again? It currently lives in the Detroit area, but will be back in Canada hopefully before the end of the year.
But if I happen to win the lottery, it may just end up with JHM in California, while I beg them to adapt their Vortech kit to the car. Because, who doesnt need a supercharged v10 
Thanks man. The guys at the shop are true artists. So much work has gone into the car, and I couldn’t be happier with the way things are turning out.
As we have mentioned many times, the fundamentals for the performance piece of the project are all copied from the path established by the fast NA v8 S4 builds. At the same, it is so cool to see those principles applied to the v10 S6, in a whole new way. Especially since the car has been pretty much ignored by the aftermarket performance sector, up until now.
Damn! That is so sexy! Seriously amazing project I sure hope I can get that money in time!!!
the headers are truly the worst business idea ever. There’s a reason the only competitors are crap that is made in China (and doesn’t work because they do fuck all in the way of researching them)
JHM sells the S4 headers (V8) for around $2750. They literally hand made them for the last 7 years. It takes a dog’s age to make a set, and on top of this they use retardedly high quality stainless pipe and flanges etc. If they’re not perfect, they pretty much scrap them. When all is said and done after paying the welder to make them, they make a few hundred bucks. They tie up their fabricator for a bunch of hrs to do so, use space in his shop etc. All for a few hundred bucks that is pretty much gonzo if they wreck a set. On top of this, they wrecked about 10 sets when they designed them. There aren’t many around (not many guys have $2750 for an exhaust mod and want to do an engine pull to install them). So they take forever to recoup R&D
The S6? These will be financially worse if you can believe it.
So I get why people are like ‘let’s get some nice cheap ones like the LSX world’. That’s not happening. If you can make equivalent quality and performance headers to what JHM makes for say half the cost, JHM will buy 500 sets from you and sell them as JHM headers. But you won’t. Because you can’t.
What a great post. All true. There’s no money in making these headers. There’s big performance but not big momey
Definitely a great post.
As you probably know, I am giving people a chance to buy them at cost until June 30th. And still, I get the feeling that some people think we are making some profit on them. There isnt any profit with the current offer…not a dime.
Once the car is all bolted back up and on the road, I probably will arrange another group buy. But, the price will be higher, and we will need a minimum of five or six guys to make it happen. The people who REALLY want them, will get them now.
It is funny, we will probably sell a lot more catbacks, or even CAI, than headers. The headers are definitely the first place I would put my money (and the CountVohn tune). They resolve a lot of the critical problems with the car AND add a ton of performance. But, people are used to buying catbacks and CAIs. And they are a bit cheaper, and less labor. So that is what they’ll buy first. Not saying those arent great products, but the headers are the key piece to transforming the v10 S6 into something incredible.
Looking great!! Are they going to sell the rest of the exhaust too?
I will let you know about the header purchase in 2 weeks.
Thanks Nordy!
I think the catback (we keep calling it a catback, even though it actually goes further, and includes optional cats and O2 bungs) will be made available.
Right now, since it was built to match the headers, we could make additional sets that go with the headers.
However, to make a catback with an adapter that necks down to work with the stock exhaust manifolds, we would need someone with stock manifolds still installed, to bring their car in. Or, we buy a DEV car (if that ever happens).
In any case, if there is interest, let me know. Once my car is on the road and we have sound clips and performance data, I’m sure a lot of people are going to want the catback.
I would love to go there. Just checked, and it is about a 90min drive from my Aunts place.
Problem is, I probably wont have a day pass until sometime in 2016. Dont laugh too hard, you’ll be in the same boat one day, B! LOL
What you are doing is exactly what my plans were with my 08 s6 prior to a very unfortunate accident. I did a full custom x pipe exhaust at 2.75 diameter (to perserve tq) from the mid all the way to the stock mufflera. Also did msds or mss filters, new intake and new manifold. The car broke traction on dry pavement.
Anyways will these headers fit an s8, as I would like to pick up that project next as I miss my s6…have a cayenne gts but downer feel quite the same and I miss my v10!
I’m not sure if the S6 headers would fit the S8. You would have to supply the S8, and have the shop build a set for that car.
Why dont you get another v10 S6? While a lot of this stuff could be ported to the S8 if you left your car with the shop for a few months, the S6 stuff is available NOW! And there is more coming in the next few months… stay tuned
I am fine supplying an S8, in the process of finding one what are you asking for this set so I can see attached the realms of cost would be for the s8 header build…
Also curious on the reasoning you went with a 3.0 vs. A 2.75. I thought 2.75 dual was more than efficient for the 5.2 especially ti perserve the tq. Heck I even felt the csr was a little less tqy (not by much but a 100-200 rpm) after my exhaust install. Now if you are planning on force induction of some sort the 3 makes sense otherwise you don’t think it’s overkill. I could be wrong here by I believe folks using too large diameter piping 3ish were losing some power especially down low on my e60 m5.
Interested to hear your thoughts as I’m sure there was some science behind it. I’ll have no problem doing 3.0 if the overall power is there especially the tq. Just did 2.75 piping on my cayenne gts and that is 4.8 liter so while not a v10 it’s somewhat similar in size
Ill PM you the pricing on the v10 S6 headers and exhaust. If you wanted a set for the S8, it would likely be something like the price of the S6 headers plus whatever the labor and incidental costs are for removing/reinstalling the engine from your car.
The S6 guys are getting a break right now on the pricing, since my engine is already out.
As far as the exhaust sizing, the entire system was designed and tuned to achieve maximum power over a certain RPM range. If you have properly designed headers with a well designed collector, then you dont have to worry about a loss of torque by pairing it up with a free flowing exhaust. Exhaust velocity is what is key, and our long tube header design works to maximize that.
There is a great writeup on exhaust myth that ‘engines need backpressure to acheive maximum torque’
http://www.mustangevolution.com/forum/f312/t296628/
A dual 2.75 exhaust would have been good for up to about 560 hp. A dual 3.0 will remain efficient approaching 680hp, as part of a properly designed system
http://img.photobucket.com/albums/v413/nemo1ner/Exhaustguide.jpg
What’s interesting, is that the most popular exhaust for the v10 S6 (Millteck) is only dual 2.36", which is already borderline for stock v10 S6 HP. No wonder we dont see any real gains with that exhaust.
What you said makes sense. And yes the mil sucks! I noticed a sig difference with my true x pipe 2.75; completely different car.
Excited to see your setup…if you don’t mind please pm me shop info etc. As I am serious about sending them a project s8
Also how big of wheels and tires can fit before major modification. I always wanted to fit 305 all around on am s8 but may be too much contact. I had 275 on my s6 and it for well though…
PM sent
Regarding tires, I’m going to be going with 275/30/20s on the S6. I have no idea what will fit on the S8.
10-4 275 is a nice size! A buddy was running lambo garrado wheels on his s6 with custom bracket looked pretty sweet!
Sorry Gallardo*** :o :