depends on what u mean shorten an engines life, u usualy uprated internal engine parts the more tunning u do, so not really shortening it, just costs more lol

makes sense. :thumbs:

not true, but revving the engine more will. so if you extend the rev limit it will, but directly fitting TB's only won't.

Just been talking to a mate on MSN, and he reckons throttle bodies significantly reduce an engine's life. Is this true?