AIR FILTER SWAP
The air filter is quite easy to access and the air filter box is fitted to the top of the inlet manifold at the back of the engine. Disconnect the plastic intake trunking on the passenger side of the box, then unscrew the line of four Torx T10 screws.
This is the intake trunking. It can be a bit of a pig to remove, but you need to be careful to get it off without breaking anything. Use a small flat-blade screwdriver to lift up the retaining tangs if necessary.
Here is the air filter in the lower airbox – you can see the three retaining tangs at the back for the upper airbox lid. To be fair, our old filter doesn’t look too bad, but we had a ready-to-fit new Puroflux filter supplied by GSF Car Parts.
Here’s the new and the old, as well as the upper airbox with some debris. Clean this out, and you should blow out the lower box, although this should still be clean. Reassemble the filter box, taking care to get a good filter seal.