A Real nice and Easy Upgrade is to Remove and Replace
the Side Repeaters for the Dark Smoked look.



Here is the Standard Side Repeater for the Astra j 5 Door.



To Remove them from the Car all you Need is an old Credit Card,
Start at the Back by pushing the Card in,
and Push the Tab on the back of the Side Repeater
and They will Then just Pop off
the Same will Apply for the GTC.







Now you have the Repeater out
simply twist the Bulb and the Bulb will come out
Then you can Replace the Repeaters
for the new Dark Smoked ones.



This is a low Budget and an easy to do Upgrade
but its all About the Detail and they look so much Better  
they cost Around £20 from eBay
and they are Well Worth Doing.