Quote:
Originally Posted by MagnumForceGB
I have the Stage 4 Ported Intake Manifold from MACE, had problems at first since I put mine through extreme pressures and heat, now the filling that kept coming off is holding strong. For gains I know I'm getting more air into the chamber with the ported manifold, my AFR was leaner than with the stock manifold. But I have a supercharger and other heavy mods.
For the RX one... I'm not going to comment on it. If you do get one, make sure you a tune.
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+1, If you have a bunch of other bolt ons you should consider a tune. Our current testing of our new style manifold spacer and ported intake on the LFX showed appx .4-.5 leaner from the additional airflow.