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What is everyone running for an air filter on your turbo? Mainly for just street use and would take it off at the drag strip.
 

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Probably K&n is most common. All depends what kinda room you have to work with and inlet size on the turbo.

don’t use the “inverted cone “ top ones , they usually get sucked in and destroy compressor wheels.
 

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There was just another post on a site about this, dont use the Spectra filters that have the metal end on the filter, the centers pop off (in) and kill the turbos. Been several cases of that. I use a big K & N that fits a BW S475, 5".
 

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I run an AFE on my BW S475. I was limited to 6" length and they had the dimensions I needed. Street only
 

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