this mod only really works on turbo models, to make an NA faster you need to alter compression ratios and headflow, aswell as airflow thru the inlet manifold
I have a 960 TB on my forged 850 T-5R
youd probably get some gains from running the 2.5 20V inlet manifold, which co-incidentally has a larger TB than the turbo models. Some of the turbo modding folks like these manifold, supposedly smoother flowing but i couldnt confirm either or.
Dunc
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