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Originally Posted by asaadF30
This my first time changing a downpipe, I have a dinan stage 1 tune. What do I need to change to install a catless downpipe with no issues? Im afraid that the turbo will over boost and kill the engine. Do I have to tune the engine for the new downpipe?
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No, you don't need to tune it for the catless downpipe.
But, with proper tune, it would be more beneficial.
The other issue is the CEL. With Dinan tune, it doesn't supress the CEL. Your option now is either get the Macht Schnell EVC or BMS CAN Flap Module.