Corsa-B.uk - Vauxhall, Opel and Holden Corsa B Owners Club

Are they straight forward to install or is there drilling or customization involved?

if they're vauxhall ones they're a straight fit, best bet is to use a couple of small self tappers aswell just to hold them on as they're only suposed to 'clip' in place aswell as the odd screw, but self tappers make sure they dont fall off and make sure you get the correct pre or post 97 flaps for your rear bumper

Another thing can cause this is if the rear brakes have not been adjusted properly at the drums/shoes and someone has made all the adjustment on the handbrake cable. It makes it so there is no movement left at the the brake shoes for the cable to go back any more and so it push the lever up a little. Happens on a lot of drum brake systems that have been adjusted incorrectly. You should let all the adjustment off the cable then set up the shoes correctly, don't rely on the self adjuster cuz they are pretty wank and barely work properly, once you have that right then adjust the cable. If you have a lip on the brake drums it will cause problems setting up the shoes though.

I don't know how the above post ended up here when I posted it in reply to a handbrake thread rofl