CMTOOL Engine Camshaft Alignment Locking Tool Kit Compatible with VW Audi 2.0 2.8 3.0T 3.2 4.2 5.2 Engine A4 A6 A6L A8 Q5 Q7 R8 Engine Camshaft Locking Alignment Timing Tool Set

You hope you never need it, but when the time comes to replace a timing belt, these are invaluable. One mistake or accidental turn of the camshaft, even slightly, when replacing a belt and your timing can be destroyed. And in an interference engine, if you don't catch it and correct it (which can be very involved) you risk having your valves smack the pistons and cause massive internal engine damage. Instead, you can buy this kit and securely and safely lock your camshafts in place so that your timing stays perfect after you change your belt. It is a small price to pay for peace of mind and versus the cost of an engine replacement.