Leave the holes and stick some exhaust in them. lol

You never cease to amaze! A thought... I love the vents behind the rear tire, and I really like the new angle of the back taillight section just under the spoiler. Regarding the vent... Consider having the 90 degree angles mimic the radius of the side body vents. Way cool for sure!
I really like the vent on the side behind the tire ( it has rounded edges instead of square. I will make the other side openings rounded to match) but it doesn't seem to flow like I would like.
Soooooo...will the stock, hinged engine cover now be converted to a 'lift-off' due to the new rear mods...or will the new tail section itself be removable in order to allow the stock engine cover to tilt open in the standard manner...or...? :shrug:
Hmmmm. Although it may not be, it looks kind of 'heavy' if you catch my drift. Possibly due to the colour mismatch though...:shrug:
If the rear diffuser used an exponential curve rather than a linear slope (as it has now), it would be more effective, allowing you to reduce the length of the diffuser ( by about a third) for the same effect,