Be careful of the plenum gasket as its easily bended. As per the guide Wasso sent you make sure you remove and re-install the bolts in the right order and DONT over torque them. Had mine off a few times and its fairly straight forward. I cut out a piece of cardboard, drew the plenum on it and pushed the bolts into the card in the position they are on the plenum. They are different lengths and its easy to get it wrong or miss one. No need to do it but I did whilst I was learning. I also took my TB off to paint it but didn't dare clean it as I had heard a few horror stories and didn't want to run the risk of having one myself.