IDI Wastegate Delete Flange with 3" V-Banded Outlet
Through some performance testing with the factory turbo I found that even with the wastegate mechanically locked and preloaded the arm would still slightly bend allowing exhaust to leak past the turbine slowing the response from the turbo and limiting boost through the rev range.
I designed a flange to match the proprietary ford outlet pattern with a step pipe and a 3" v band. This completely blocks off the wastegate passage and streamlines the exhaust flow through the turbine. I saw improved response from the turbo, less drive pressure and a few psi more boost. I built a 3" up pipe for a hood stack which eventually became the up pipe for the compound turbo setup, which also worked flawlessly with no boost leaks and made a ton more room around the turbo, making turbo removal a 20 minute job, and fabricating a downpipe or up pipe very easy.
If you don't have a welder and want to have a bolt on downpipe to connect up with the rest of the exhaust next to the transmission, there is an option to add on a 3" stainless steel downpipe fabricated to fit the CDD outlet flange.