Performance air filters - Pictures

K&N 57i Performance KitPrice: From £61 Type: Induction kitContact: 01925 636950, www.knfilters.comComment: designed or fuel-injected cars, the 57i kit is a simpler, freer flowing air intake system. Fitting can be done DIY or

K&N ElementsPrice: From £33 Type: Replacement filterContact: 01925 636950, www.knfilters.comComments: a direct replacement, this slots straight into the standard air box without any modifications. It comes with a million-mile

Green Cotton Performance Direct Induction KitPrice: From £45 Type: Induction kitContact: 01978 664466, www.demon-tweeks.co.ukComment: this kit’s green finish makes dirt build-up stand out. It boosts torque, is easy to fit

BMC CDAPrice: £153.51 Type: Induction kitContact: 01978 664466, www.demon-tweeks.co.ukComment: stylish carbon fibre air box deflects heat away from filter, keeping the air cooler on its way to the engine. It has a reusable cotton

Evolution V-Flow Price: From £245 Type: Induction kit Contact: 023 8055 8636, www.regal-auto.co.uk Comment: pricey offering hides the filter in a heatproof box which seals with the closed bonnet, keeping the air cool. Kit uses a