This is the gheyest idea ever.... but it may work.
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GRM lieks cars that are different in the challenge , the car that did really well thsi year was a TT L98 vette with a Sinowmobile motor in the passenger seat , connected to a fan for added Downforce.
Anyway here goes. (this is dumb *** at it's best)

electric exhaust cutout off of the manifold.
2 turbo's mounted on the outlet portions (sequential)
NOS brand window switch , for low RPM the little turbo runs , at higher rpm the window switch opens the cutout and diverts the gas to a bigger turbo.
It is a dumbass idea , you would make more overall power with a single turbo , but maybe not useable power...
Plus it just sounds cool
cheap to do.
I doubt I will do it, but it's just been in my head...so I thought I woudl share...
Jm
Builder of Crap
driver of Dreams
turbo corvair , blow through , WRX intercooler , T04E
86 Fiero GT 32V northstar V8 5spd , stand alone
56 Velam isetta
00 TDI
79 caddy
Anyway here goes. (this is dumb *** at it's best)

electric exhaust cutout off of the manifold.
2 turbo's mounted on the outlet portions (sequential)
NOS brand window switch , for low RPM the little turbo runs , at higher rpm the window switch opens the cutout and diverts the gas to a bigger turbo.
It is a dumbass idea , you would make more overall power with a single turbo , but maybe not useable power...
Plus it just sounds cool
cheap to do.
I doubt I will do it, but it's just been in my head...so I thought I woudl share...
Jm
Builder of Crap
driver of Dreams
turbo corvair , blow through , WRX intercooler , T04E
86 Fiero GT 32V northstar V8 5spd , stand alone
56 Velam isetta
00 TDI
79 caddy
I'd imagine the exhaust would get really hot and that flapper would fail, but I've thought about that too. Maybe a better bet would be using a ching chong 50mm wastegate on a thick massive y-pipe and then a twin scroll truck turbo. merge the two streams into one scroll at low rpms and then the 50mm opens and diverts the flow into the other.
I don't think it would create a huge lag when you switched turbos because at the transition the motor is pushing a ton of gases because of the small turbo boosting. This could spool larger turbo almost instantly, especially if the cutout opened gradually.

This has been done, practically since the first turbocharged motor in 1914.
Sequential turbochargers? Come on man,
You don't even have to divide them, the small one will spool (gas will travel path of least resistance) once that one runs out of it's efficiency range the second turbocharger will be spooled and creating boost.
I think you may have wrong idea on how this part is used for. This part is something that I'm seriously considering for my new project. Since cops all over cali are just handing off loud/modified exhuast tickets 24/7. Anyways.. the idea on this is that you place this part just inline with your Downpipe and retaining your stock exhaust. This way your keeping your OE Exhuast system and with a flip of a switch you have an open exhaust. I've seen other product using boost actuator to open it so as soon as you get certain boost level and it opens up. Hope this helps.
Here's the pic for the Boost actuated Exhaust cut-off
Here's the pic for the Boost actuated Exhaust cut-off


