Originally Posted by
martysmartie
That is not quite true, in some cases fitting a filter can make an engine run worse, if affected by heat soak, for example. Imo a decent panel filter is better than a cone and that the latter just create noise. In the case and others the OE filter has a 'snorkel' fitted, so cool air is induced. Martin
Very true. Fitting a heat shield can offer minimal protection. Cold air feeds are petty essential to a cramped engine bay where a filter is susceptible to heat. Other options are arguable like stainless filters will keep cooler than a foam or cotton but this offers less filtration than the other two.
And I have to agree on a decent panel filter in an air box can provide better gains than a heat soaked filter
