27:th-Dec-2017, 18:05:09
Swirl flaps work along side the egr valve to help circulate air around the engine, but they can end up seizing and snapping when the intake becomes full of carbon causing the engine to ingest them that's how I done an egr delete and swirl flaps delete as my car was struggling with it and also dpf due to it been choked up causing flap issues and turbo issues (joys of buying an ex mobility car with low mileage lol), so removed the lot but if you still have the dpf then you would need to keep it as the egr etc help with regens, I have my astra 2.0cdti running 216bhp with a full dbilas cold air feed etc. Intercooler will be getting done next.
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