New arches were required to fit the larger-than-standard wheels I'd chosen. I went with a 'Race wide' arch. Depending on where you go and who you ask they're called slightly different names. Generally the 'Race' style arch comes in 2 widths, I chose the wider of the 2.
They're really quite easy to fit. Just make sure they're lined up properly and away you go! Drill through the preformed screw locating places and screw/attach the arches.
Now technically is screwing them on the best way to do it? The originals are fitted with rivet-type fittings. However given that I was going to need to remove and refit them several times (painting etc) riveting them on wouldn't have been the best course of action.
Also another factor to consider is that drilling and screwing into metal will cause there to be untreated bare metal exposed to the elements. Over time that will rust of course, but I'm planning to bathe the entirety of the underside of the car in sealant some time soon so it'll be sorted in due course.
A slightly trickier piece of the puzzle are these little front bumper cut outs required in the arches. If you make your arch follow a really tight curve it might not be necessary to do this part as the front edge of the arch would be slightly further back. However in my view it just didn't look right to do that.
So that's that! They are a little shabby close up as they need finishing properly. They'll be painted black and a small finishing strip will sit between arch and body to ensure a nice, tight fit.
Next up.. sorting the clutch out with a grippy new plate.
