anybody see any downpipes that have a screamer pipe built in that attaches to the stock wastegate?

for stock turbo applications on s4/s5 turbos?

 

yep.I seen one but I can't recall what MFGr.
HKS?
actually the backing plate section went to the downpipe separately than the exhaust pipe.So not really an open air screamer pipe.

 

http://rx7boutique.com/downpipe.html

I've seen the twin tube style like the first few on the link above a lot.
I couldn't find the one I was looking for.
It had one big tube and a screamer.
Looks simple enough. It just had a divider tube inside the flange that seperated the waste gate flow from exhaust.
You could prolly build your own easier than find a odd/ rare JDM piece

 

some nice rare finds. but yeah just thought somebody would have the source for one. i dont have the fabrication skills to build this and know that the time spent fabbing this at a shop would add up anyways. would love to see it. i see it so much on almost every other turbo application but not rx7's...

 

KSP Attain made a divorced wastegate downpipe. With a blockoff plate it could be made to become atmospheric dump.

 

THAT is the one I saw!

 

Nice. Sick. Been wanting a setup like this

 

Bumping this thread....

I remember seeing a while ago some guy had a downpipe that had a wide mouth on it that replaced the entire rear plate of the stock turbo.... I have no idea what brand it was though, something japanese

it looked like this:

 

none of the above will address the stock internal gate with the exception of the KSP attain, which still would require extensive internal modification to the turbo.

i still don't fully understand why everyone is so hell bent on spending so much time with the stock/hybrid turbos, the exhaust snail is a bottleneck.

 

a bell mouth with allow the wastegate to open more which would help.

if it's a divided bellmouth it would be better than the attain...

my S5 wastegate is ported and still creeps up to 12 psi pretty easily at semi-normal speeds