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   MFR# HPR8956Spectre - HPR Replacement Air Filter

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   MFR# 69-3511TRK&N - Typhoon Cold Air Induction Kit

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3. 

   MFR# 69-3511TPK&N - Typhoon Cold Air Induction Kit

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   $283.99$604.99

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   MFR# 57-2526-2K&N - Filtercharger Injection Performance Kit

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5. 

   MFR# 57-2547K&N - Filtercharger Injection Performance Kit

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Shop more by K&N

1. 

   MFR# E-3699K&N - Air Filter

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   $117.99
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   MFR# RC-5040DKK&N - Air Filter Wrap

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   MFR# RC-5159K&N - Air Filter

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4. 

   MFR# RC-5127K&N - Air Cleaner Assembly

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Popular mods for 2004 Ford Focus

1. 

   MFR# 19-065878Bilstein - B4 OE Replacement Rear

   Bilstein

   $76.00$143.07

   Save $67.07 (47%) off MSRP
2. 

   MFR# 19-065885Bilstein - B4 OE Replacement Rear

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   $82.00$153.27

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3. 

   MFR# 24-066662Bilstein - B8 Performance Plus Rear

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   $119.00$177.02

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4. 

   MFR# 24-066679Bilstein - B6 Performance Rear

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5. 

   MFR# 48-080453Bilstein - B16 (PSS9) Front and Rear

   Bilstein

   $1,929.08