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Try deleting your carbon intake filter and also installing a K&N filter like the one used in the BMW performance intake. It improved the throttle response on my 128 not by a huge amount but it was noticeable.
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'09 128i 6Sp Man Sport (263 18" wheels), Space Grey / Coral Red leather, BMW Perf Intake, Exhaust & Suspension, 3-Stage Manifold, AA Ver 2 tune, Carbon Filter & CDV Delete, Yoko S-Drives
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