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|  2008 S40 BOULAVARD 70 MPG ONLY $4399.00 
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40-3909
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- Powder-coated billet aluminum backplate eliminates external breathers
- Features built-in dyno-tuned velocity stack
- Retains factory air cleaner cover
- K&N® stamped laser-etched beauty ring
- Includes washable/reuseable K&N® high-flow air filter
Note: Does not fit Twin Cam engines with Magnetti Marelli fuel injected system
NOTE: See chart for applications.
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