[Info@mad-us.com]

Originally Posted by M4Lou

Poiseuille agrees!

Vascular surgeon in the house?

[Skyscraper]

I wonder if Valvetronic went back to the drawing board? Researching single mid pipes I noticed their EL mid pipe is no longer available on their website.

They sure do pay for the marketing. Try searching without them being at the top every time. It doesn’t matter what brand you type in.

[Skyscraper]

Originally Posted by Idemo

Or maybe some legal limbo as AA holds the patent on the EL stuff

There has to be more specifics than EL to that patent. Equal length alone isn’t possible. Too vague. Do you have the patent number? I want to read it.

[Skyscraper]

Originally Posted by Idemo

US Patent 11248511, UK and EU patent 3882441)

Thanks. Interesting the sineous tube is unique enough to get a patent.
I found a few other exhaust patents that were interesting.

But the patent won’t stop China… LOL

[Skyscraper]

Originally Posted by Idemo

China doesn’t care about any patents but the companies that own them are defin filing suits against companies here that are selling , such as vorsteiner suing rw carbon and bimmer plug.

We all know China doesn't GAF about anyone but China.

I learned something today working off of that patent. I found 11 different EL patent designs. Who knew...
I would have tried this one (Patent #US8402756B2) with the single mid pipe design. I may just make my own based off it.
Start with a 4" and taper to a 3.5 after the longer tube to keep the gases moving.
Or an oval 3.5" or 4" so the longer pipe doesn't block the gases of the shorter pipe.
I need a project. This could be fun.

[forcefed]

Originally Posted by Skyscraper

Thanks. Interesting the sineous tube is unique enough to get a patent.
I found a few other exhaust patents that were interesting.

But the patent won’t stop China… LOL

What site is that from?

[Sp2pilot]

Originally Posted by forcefed

What site is that from?

Aliexpress

https://www.aliexpress.us/item/32568...yAdapt=glo2usa

[forcefed]

Originally Posted by Sp2pilot

Aliexpress

https://www.aliexpress.us/item/32568...yAdapt=glo2usa

Damn they have those secondary cat delete pipes for $150 https://www.aliexpress.com/item/1005006151818880.html

Whoaaa center exit exhaust https://www.aliexpress.com/item/1005006235134331.html
Nice find!

[SevenNine]

Originally Posted by Skyscraper

I wonder if Valvetronic went back to the drawing board? Researching single mid pipes I noticed their EL mid pipe is no longer available on their website.

They sure do pay for the marketing. Try searching without them being at the top every time. It doesn’t matter what brand you type in.

The midpipe is still available on their website. You have to select "no exhaust tips (midpipe)" option.

I don't think anyone using the VT EL or AA EL has had issues with flow or performance. Both sound better than anything else on the market imo.

Btw, everyone pays for the marketing. Some just do it better than others.

[mike@x-ph.com]

Originally Posted by SevenNine

The midpipe is still available on their website. You have to select "no exhaust tips (midpipe)" option.

I don't think anyone using the VT EL or AA EL has had issues with flow or performance. Both sound better than anything else on the market imo.

+1 we still offer the valvetronic midpipe on our website as well.

The 2 midpipes have a different design and produce a different tone. its a matter on personal preference on whether you want a pure equal length (active autowerke) or a modified single (Valvetronic)

[forcefed]

Originally Posted by AhsanU

I had AA's old single midpipe and currently have a special sauce VT midpipe.

Do you have any pics of that vt midpipe?

[AhsanU]

Originally Posted by forcefed

Do you have any pics of that vt midpipe?

[Jims M3]

Originally Posted by mike@x-ph.com

I have not seen any data showing the single midpipe making less power than any other midpipe design.

On the F80 there are proven gains on the single pipe AA exhaust, why would it be different in the S58?

I just installed a single pipe AA, on mine it sounds amazing no drone.

[mike@x-ph.com]

Originally Posted by Jims M3

On the F80 there are proven gains on the single pipe AA exhaust, why would it be different in the S58?

I just installed a single pipe AA, on mine it sounds amazing no drone.

I don't think its any different on the S58

[Berzerker]

Originally Posted by Jims M3

On the F80 there are proven gains on the single pipe AA exhaust, why would it be different in the S58?

I just installed a single pipe AA, on mine it sounds amazing no drone.

Well the difference would be the exhaust setup on the F80 vs G80. But there are dyno videos out there showing midpipe swap gets you an additional 10-15hp.

Not that much but I don't think anyone is doing this for hp gains.