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Message: <blockquote data-quote="khguan" data-source="post: 886864" data-attributes="member: 4518">when we wanto twist de air.. we have to maintain de airflow as well... we would not wanto put in restriction as it will deteriorate de engine performance due to "breathing" difficulties...improvements i felt was.. de engine are more willing to rev at higher rpm... FC wise... not much diff... power so so...waja2003,de hose from extractor to de airfilter is to let de engine to suck in hot air when de engine is cold... it is controlled by a valve... so dat de engine will not suck in hot air all de time...hot air intake is not good when de engine is warmed up as hot air is less dense... less particles to expand during combustion....next time b4 posting any new thread... pls use de search function to search whether wat u wanto post got ppl post b4 or not... so dat we would not need to re-discuss again n again... in fact u can find many info bout this DIY in de old thread...</blockquote>

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