Has your GTV/Spider got one of these in the air box?
Here's a puzzle. I was looking through the GTV/Spider workshop manual and spotted the attached (hopefully) diagram which indicates there should be an "Air Cleaner Manifold" sitting inside the air filter and connecting to the lid of the air box. Oddly, it's not shown on all the diagrams relating to the air filter/box.
My ph2 2.0TS doesn't have one, and I'm trying to work out if this is normal, or if it has been lost at some stage. I'm assuming it's designed to ensure air is sucked from well within the centre of the filter, but I'm wondering if without it the filter isn't properly sealed and unfiltered air could leak round the top of the filter?