They can perish with age / heat and also the air filter housing can vibrate a fair bit. Make sure you buy good quality replacements, cheap stuff just wont last as long.
 
They can perish with age / heat and also the air filter housing can vibrate a fair bit. Make sure you buy good quality replacements, cheap stuff just wont last as long.
+1
Also, how much does your engine move? Are your engine and gearbox mounts ok? By the time a little movement works it's way out to the airbox it'll be a big shake.
 
You're not the only one. Keep a steady supply in a drawer in your garage and replace as necessary.
 

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