The movie that re defined chemistry. Apparently it is now possible to blow up an inert gas (NOS) by using a cigarette lighter. Nitrous (aka. NOS) is actually Nitrous Oxide or N2O. I do not see any hydrocarbons to burn there.(Quick chemistry lesson: When nitrous oxide is heated up, such as in an engine, it breaks apart to become separate nitrogen and oxygen molecules. This provides more oxygen to the engine which in turn gives you more performance) The movie that also gave a bad name to the R34 Skyline, and the Supra, and BMW, and many other respectable cars. As for exhaust manifold buildup... the only way I can see this happening is if your turbo suddenly decided it liked being a brick wall instead.
Even though Hollywood says it's possible, you still cannot burn an inert gas. Fast and the Furious made my inner car guy cry.