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TurboXS stealthback exhaust.
Here you can see the difference between the stock downpipe and the turboXS unit which removes one cat and starts at 4"
tapering down to 3".
To fight boost creep, the wastegate in the turbo was ported. Here's a picture after removing the hot section of the turbo.
The hole with the flapper valve on the left is the wastegate. It blows off excess boost pressure. I ported the inside of
this to flow better to keep the boost pressures at the factory level (14.5 psi).
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