Skip to main content
Hi !Hi! Sign in or registerDaily DealsBrand OutletGift CardsHelp & Contact
Sell
Watchlist
My eBay
  • Summary
  • Recently Viewed
  • Bids/Offers
  • Watchlist
  • Purchase History
  • Buy Again
  • Selling
  • Saved Feed
  • Saved Searches
  • Saved Sellers
  • My Garage
  • Sizes
  • My Collection
  • Messages
  • PSA Vault
Please sign-in to view notifications.
Loading...
eBay Home
Advanced
Copyright © 1995-2025 eBay Inc. All Rights Reserved. Accessibility, User Agreement, Privacy, Consumer Health Data, Payments Terms of Use, Cookies, CA Privacy Notice, Your Privacy Choices and AdChoice

UNI ATV, Side-by-Side & UTV Intake & Fuel Systems for Polaris Sportsman 400

Shop by popular categories

  • Carburetors
    Carburetors
  • Air Filters
    Air Filters
  • Fuel Tanks
    Fuel Tanks
  • Other Air Intake & Fuel Delivery
    Other Air Intake & Fuel Delivery
  • Fuel Valves & Petcocks
    Fuel Valves & Petcocks
  • Fuel Pumps & Sending Units
    Fuel Pumps & Sending Units
  • Air Filter Housings
    Air Filter Housings
  • Fuel Tank Caps
    Fuel Tank Caps
  • Fuel Injectors
    Fuel Injectors
  • Gaskets, Seals & O-Rings
    Gaskets, Seals & O-Rings

Related Searches

  • Polaris SPORTSMAN 400 Carburetor
  • 400 Polaris SPORTSMAN Parts
  • 2014 Polaris SPORTSMAN 400 Ho
  • Polaris SPORTSMAN 700 Carburetor
  • Polaris SPORTSMAN 500 Carburetor
  • Polaris SPORTSMAN 500 Ho Carburetor
  • 2004 Polaris SPORTSMAN 400 4x4
  • Polaris SPORTSMAN 500 Gas Tank
  • Polaris 700 SPORTSMAN Fuel Pump
  • Polaris SPORTSMAN 90 Carburetor Oem
  • Polaris Ranger 400 Carburetor
  • Polaris SPORTSMAN 500 Parts

Find parts that fit

We need more information about your vehicle to confirm fit.

Polaris
Sportsman 400

breadcrumb

  • eBay
    • eBay Motors
    • Parts & Accessories
    • ATV, Side-by-Side & UTV Parts & Accessories
  • eBay Motors
  • Parts & Accessories
  • ATV, Side-by-Side & UTV Parts & Accessories
  • Air Intake & Fuel Delivery
  • UNI ATV, Side-by-Side & UTV Intake & Fuel Systems for Polaris Sportsman 400

Shop by category

  • ATV, Side-by-Side & UTV Parts & Accessories
    • Air Intake & Fuel Delivery
    • Air Filter Housings
    • Air Filters
    • Air Hoses, Lines & Pipes
    • Air Intake & Fuel Sensors
    • Carburetor Parts
    • Carburetors
    • Fuel Filters
    • Fuel Hoses, Lines & Pipes
    • Fuel Injectors
    • Fuel Pumps & Sending Units
    • Fuel Tank Caps
    • Fuel Tanks
    • Fuel Valves & Petcocks
    • Gaskets, Seals & O-Rings
    • Intake Covers, Ducts & Scoops
    • Manifold Intake Adapter, Inlet & Joint
    • Other Air Intake & Fuel Delivery
    • Throttle Bodies
    • Throttle, Idle, Cruise Control Cables & Linkages
    • Turbochargers, Superchargers & Parts
    • Uni Air Filter #NU8503ST Polaris MADE IN USA 'NEW' SHIPS TODAY FREE - Image 1 of 4
    • Uni Air Filter #NU8503ST Polaris MADE IN USA 'NEW' SHIPS TODAY FREE - Image 2 of 4
    • Uni Air Filter #NU8503ST Polaris MADE IN USA 'NEW' SHIPS TODAY FREE - Image 3 of 4
    • Uni Air Filter #NU8503ST Polaris MADE IN USA 'NEW' SHIPS TODAY FREE - Image 4 of 4

    Uni Air Filter #NU8503ST Polaris MADE IN USA 'NEW' SHIPS TODAY FREE (For: Polaris Sportsman 400)

    AUTHORIZED DEALER ships same day M-F order by 1pm EST
    Brand New · UNI
    (58)
    $44.77
    Free shipping

    Top Rated Plus

    • Sellers with highest buyer ratings
    • Returns, money back
    • Ships in a business day with tracking
    Learn More    Top Rated Plus
    S⁣N⁣U⁣ ⁣p⁣0⁣B⁣o⁣n⁣ ⁣s⁣K⁣o⁣C⁣r⁣е⁣ ⁣d⁣I⁣9⁣⁣ ⁣⁣⁣⁣⁣⁣⁣
  • Polaris Sportsman 400 4x4, 1994-1995, Uni-Filter Air Filter - 400L - NU-8501ST - Image 1 of 1

    Polaris Sportsman 400 4x4, 1994-1995, Uni-Filter Air Filter - 400L - NU-8501ST (For: Polaris Sportsman 400)

    Brand New · UNI
    $27.01
    $6.50 shipping
    Only 1 left!
    S⁣3⁣р⁣o⁣F⁣n⁣ ⁣5⁣8⁣s⁣ ⁣Q⁣o⁣r⁣S⁣ ⁣I⁣e⁣d⁣⁣Y⁣⁣⁣ ⁣D⁣1⁣ ⁣3⁣
  • Polaris Sportsman 400 HO 4x4, 2008 2009 2010, Uni-Filter Air Filter, NU-8503ST - Image 1 of 1

    Polaris Sportsman 400 HO 4x4, 2008 2009 2010, Uni-Filter Air Filter, NU-8503ST (For: Polaris Sportsman 400)

    Brand New · UNI
    $31.11
    $5.99 shipping
    E⁣S⁣K⁣ ⁣P⁣O⁣ ⁣p⁣о⁣n⁣S⁣s⁣o⁣A⁣r⁣e⁣ ⁣d⁣⁣N⁣⁣Z⁣⁣⁣⁣⁣⁣ ⁣
    • Uni Air Filter #NU8503ST Polaris MADE IN USA Fast Free Shipping - Image 1 of 4
    • Uni Air Filter #NU8503ST Polaris MADE IN USA Fast Free Shipping - Image 2 of 4
    • Uni Air Filter #NU8503ST Polaris MADE IN USA Fast Free Shipping - Image 3 of 4
    • Uni Air Filter #NU8503ST Polaris MADE IN USA Fast Free Shipping - Image 4 of 4

    Uni Air Filter #NU8503ST Polaris MADE IN USA Fast Free Shipping (For: Polaris Sportsman 400)

    Brand New · UNI
    (58)
    $46.06
    Free shipping

    Top Rated Plus

    • Sellers with highest buyer ratings
    • Returns, money back
    • Ships in a business day with tracking
    Learn More    Top Rated Plus
    8⁣S⁣P⁣р⁣o⁣ ⁣n⁣P⁣s⁣o⁣C⁣ ⁣r⁣e⁣d⁣⁣⁣U⁣R⁣ ⁣⁣H⁣E⁣ ⁣⁣O⁣⁣C⁣
  • Polaris Sportsman 400 4x4, 2002 2003 2004 2005, Uni-Filter Air Filter, NU-8503ST - Image 1 of 1

    Polaris Sportsman 400 4x4, 2002 2003 2004 2005, Uni-Filter Air Filter, NU-8503ST (For: Polaris Sportsman 400)

    Brand New · UNI
    $31.11
    $5.99 shipping
    5⁣T⁣⁣ ⁣⁣⁣⁣⁣⁣L⁣E⁣⁣ ⁣⁣T⁣1⁣⁣ ⁣⁣6⁣⁣⁣0⁣ ⁣E⁣⁣P⁣ ⁣
  • Uni Multi-Stage Competition Air Filter for 1996 Polaris Sportsman 400 4x4 ATV - Image 1 of 2

    Uni Multi-Stage Competition Air Filter for 1996 Polaris Sportsman 400 4x4 ATV

    ✅ Free Shipping ✅ Experienced Staff ✅ Authorized Dealer
    Brand New · UNI
    $40.83
    Free shipping

    Top Rated Plus

    • Sellers with highest buyer ratings
    • Returns, money back
    • Ships in a business day with tracking
    Learn More    Top Rated Plus
    ⁣⁣I⁣I⁣⁣⁣ ⁣V⁣X⁣⁣ ⁣⁣7⁣3⁣⁣ ⁣⁣⁣⁣⁣J⁣U⁣⁣⁣⁣⁣ ⁣I⁣
  • Uni Air Filter Made in USA 1994-1997 Polaris 400 Sportsman 4x4 NU-8501ST NEW - Image 1 of 1

    Uni Air Filter Made in USA 1994-1997 Polaris 400 Sportsman 4x4 NU-8501ST NEW (For: Polaris Sportsman 400)

    Brand New · UNI
    $41.60
    Free shipping

    Top Rated Plus

    • Sellers with highest buyer ratings
    • Returns, money back
    • Ships in a business day with tracking
    Learn More    Top Rated Plus
    L⁣I⁣⁣ ⁣⁣7⁣⁣T⁣ ⁣⁣⁣⁣⁣⁣0⁣N⁣⁣ ⁣⁣⁣⁣⁣6⁣B⁣⁣⁣ ⁣0⁣
  • Polaris Sportsman 400 4x4, 2001, Uni-Filter Air Filter - NU-8502ST - Image 1 of 1

    Polaris Sportsman 400 4x4, 2001, Uni-Filter Air Filter - NU-8502ST (For: Polaris Sportsman 400)

    Brand New · UNI
    $27.83
    $5.99 shipping
    Only 1 left!
    ⁣8⁣⁣⁣⁣⁣D⁣⁣⁣⁣ ⁣8⁣⁣⁣⁣⁣6⁣ ⁣⁣⁣K⁣⁣K⁣ ⁣E⁣E⁣⁣ ⁣
  • Uni Multi-Stage Competition Air Filter for 1996 Polaris Sportsman 400 4x4 - fd - Image 1 of 4

    Uni Multi-Stage Competition Air Filter for 1996 Polaris Sportsman 400 4x4 - fd (For: Polaris Sportsman 400)

    The #1 Seller of Genuine Uni Parts on eBay
    Brand New · UNI
    $41.93
    Free shipping
    7⁣K⁣ ⁣⁣C⁣⁣J⁣⁣⁣ ⁣Z⁣⁣⁣⁣1⁣⁣⁣⁣⁣⁣⁣ ⁣I⁣⁣N⁣ ⁣F⁣⁣
  • Uni Multi-Stage Competition Air Filter for 2008-2013 Polaris Sportsman 400 fq - Image 1 of 4

    Uni Multi-Stage Competition Air Filter for 2008-2013 Polaris Sportsman 400 fq

    The #1 Seller of Genuine Uni Parts on eBay
    Brand New · UNI
    $41.93
    Free shipping
    ⁣⁣I⁣E⁣ ⁣U⁣⁣⁣9⁣ ⁣⁣X⁣H⁣ ⁣H⁣⁣⁣Q⁣⁣⁣⁣⁣ ⁣5⁣⁣O⁣ ⁣⁣
  • Uni Multi-Stage Competition Air Filter for 2001-2005 Polaris Sportsman 400 - wy - Image 1 of 4

    Uni Multi-Stage Competition Air Filter for 2001-2005 Polaris Sportsman 400 - wy (For: Polaris Sportsman 400)

    The #1 Seller of Genuine Uni Parts on eBay
    Brand New · UNI
    $41.93
    Free shipping
    A⁣⁣⁣A⁣⁣⁣ ⁣A⁣8⁣ ⁣O⁣C⁣ ⁣D⁣2⁣ ⁣⁣⁣⁣⁣⁣⁣⁣5⁣4⁣⁣⁣⁣
  • Uni Multi-Stage Competition Air Filter for 1997 Polaris Sportsman 400L - yn - Image 1 of 4

    Uni Multi-Stage Competition Air Filter for 1997 Polaris Sportsman 400L - yn

    The #1 Seller of Genuine Uni Parts on eBay
    Brand New · UNI
    $41.93
    Free shipping
    0⁣⁣⁣T⁣ ⁣L⁣V⁣ ⁣⁣X⁣⁣A⁣ ⁣X⁣S⁣⁣ ⁣⁣⁣⁣⁣F⁣L⁣ ⁣⁣⁣⁣M⁣
  • UNI 2008-2014 Sportsman 400 HO 2X4 Polaris MULTI-STAGE COMPETITION AIR FILTER NU - Image 1 of 1

    UNI 2008-2014 Sportsman 400 HO 2X4 Polaris MULTI-STAGE COMPETITION AIR FILTER NU (For: Polaris Sportsman 400)

    *Fast shipping *Huge selections*No Restock fees
    Brand New · UNI
    (58)
    $47.67
    Free shipping

    Top Rated Plus

    • Sellers with highest buyer ratings
    • Returns, money back
    • Ships in a business day with tracking
    Learn More    Top Rated Plus
    Y⁣⁣B⁣ ⁣X⁣⁣5⁣⁣ ⁣J⁣⁣⁣J⁣ ⁣2⁣⁣1⁣⁣⁣ ⁣7⁣C⁣⁣⁣ ⁣⁣H⁣⁣
  • Uni Air Filter #NU8503ST Polaris MADE IN USA Fast Free Shipping - Image 1 of 4

    Uni Air Filter #NU8503ST Polaris MADE IN USA Fast Free Shipping (For: Polaris Sportsman 400)

    Brand New · UNI
    (58)
    $46.06
    Free shipping

    Top Rated Plus

    • Sellers with highest buyer ratings
    • Returns, money back
    • Ships in a business day with tracking
    Learn More    Top Rated Plus
    S⁣Ѕ⁣p⁣M⁣o⁣ ⁣R⁣n⁣W⁣ ⁣Q⁣2⁣ ⁣s⁣o⁣S⁣r⁣3⁣e⁣d⁣⁣⁣ ⁣⁣⁣I⁣I⁣ ⁣
  • Reusable Foam Air Filter Uni Filter NU-8503ST Polaris Sportsman & Scrambler - Image 1 of 2

    Reusable Foam Air Filter Uni Filter NU-8503ST Polaris Sportsman & Scrambler (For: Polaris Sportsman 400)

    USA-Based - Fast Shipping on Uni Filter from StarCycle
    Brand New · UNI
    (2)
    $43.95
    Free shipping
    T⁣B⁣ ⁣7⁣S⁣p⁣o⁣n⁣I⁣s⁣о⁣r⁣ ⁣e⁣6⁣J⁣ ⁣d⁣⁣9⁣⁣⁣C⁣⁣ ⁣⁣⁣⁣
  • Uni Multi-Stage Competition Air Filter NU-8503ST - Image 1 of 1

    Uni Multi-Stage Competition Air Filter NU-8503ST (For: Polaris Sportsman 400)

    Fast and Reliable Seller- ebay Business Award Winner
    Brand New · UNI
    (58)
    $35.29
    $9.99 shipping

    Top Rated Plus

    • Sellers with highest buyer ratings
    • Returns, money back
    • Ships in a business day with tracking
    Learn More    Top Rated Plus
    1⁣S⁣S⁣p⁣o⁣n⁣s⁣ ⁣o⁣r⁣е⁣6⁣d⁣⁣⁣B⁣⁣ ⁣Q⁣⁣4⁣⁣ ⁣⁣⁣⁣⁣⁣
  • Uni Multi-Stage Competition Air Filter for 2008-2013 Polaris Sportsman 400 HO - Image 1 of 2

    Uni Multi-Stage Competition Air Filter for 2008-2013 Polaris Sportsman 400 HO

    ✅ Free Shipping ✅ Experienced Staff ✅ Authorized Dealer
    Brand New · UNI
    $40.83
    Free shipping

    Top Rated Plus

    • Sellers with highest buyer ratings
    • Returns, money back
    • Ships in a business day with tracking
    Learn More    Top Rated Plus
    T⁣0⁣⁣ ⁣⁣⁣T⁣6⁣⁣ ⁣W⁣⁣⁣⁣⁣8⁣⁣⁣ ⁣C⁣6⁣⁣ ⁣H⁣V⁣ ⁣⁣⁣
  • Uni Multi-Stage Competition Air Filter for 2001-2005 Polaris Sportsman 400 ATV - Image 1 of 2

    Uni Multi-Stage Competition Air Filter for 2001-2005 Polaris Sportsman 400 ATV

    ✅ Free Shipping ✅ Experienced Staff ✅ Authorized Dealer
    Brand New · UNI
    $40.83
    Free shipping

    Top Rated Plus

    • Sellers with highest buyer ratings
    • Returns, money back
    • Ships in a business day with tracking
    Learn More    Top Rated Plus
    ⁣⁣R⁣K⁣⁣ ⁣7⁣6⁣⁣ ⁣7⁣0⁣⁣⁣ ⁣⁣6⁣⁣F⁣ ⁣⁣⁣6⁣⁣⁣⁣ ⁣⁣
  • Uni Multi-Stage Competition Air Filter for 1997 Polaris Sportsman 400L ATV - Image 1 of 2

    Uni Multi-Stage Competition Air Filter for 1997 Polaris Sportsman 400L ATV

    ✅ Free Shipping ✅ Experienced Staff ✅ Authorized Dealer
    Brand New · UNI
    $40.83
    Free shipping

    Top Rated Plus

    • Sellers with highest buyer ratings
    • Returns, money back
    • Ships in a business day with tracking
    Learn More    Top Rated Plus
    ⁣4⁣N⁣ ⁣O⁣4⁣⁣⁣ ⁣⁣B⁣⁣⁣W⁣⁣ ⁣C⁣⁣T⁣⁣ ⁣S⁣U⁣ ⁣⁣⁣⁣⁣
  • Polaris Sportsman 400 4x4, 1996-1997, Uni-Filter Air Filter - NU-8503ST - Image 1 of 1

    Polaris Sportsman 400 4x4, 1996-1997, Uni-Filter Air Filter - NU-8503ST (For: Polaris Sportsman 400)

    Brand New · UNI
    $31.11
    $5.99 shipping
    ⁣D⁣W⁣⁣⁣ ⁣⁣⁣⁣⁣J⁣⁣⁣⁣A⁣ ⁣⁣⁣E⁣M⁣⁣ ⁣⁣V⁣⁣⁣P⁣ ⁣
  • UNI 1996 Sportsman 400 4X4 Polaris MULTI-STAGE COMPETITION AIR FILTER NU-8503ST - Image 1 of 1

    UNI 1996 Sportsman 400 4X4 Polaris MULTI-STAGE COMPETITION AIR FILTER NU-8503ST (For: Polaris Sportsman 400)

    *Fast shipping *Huge selections*No Restock fees
    Brand New · UNI
    (58)
    $47.67
    Free shipping

    Top Rated Plus

    • Sellers with highest buyer ratings
    • Returns, money back
    • Ships in a business day with tracking
    Learn More    Top Rated Plus
    ⁣P⁣R⁣⁣ ⁣⁣⁣I⁣⁣⁣K⁣ ⁣⁣⁣⁣⁣⁣J⁣2⁣⁣ ⁣⁣M⁣⁣⁣P⁣⁣ ⁣
  • UNI 1997 Sportsman 400L 4x4 Polaris MULTI-STAGE COMPETITION AIR FILTER NU-8503ST - Image 1 of 1

    UNI 1997 Sportsman 400L 4x4 Polaris MULTI-STAGE COMPETITION AIR FILTER NU-8503ST (For: Polaris Sportsman 400)

    *Fast shipping *Huge selections*No Restock fees
    Brand New · UNI
    (58)
    $47.67
    Free shipping

    Top Rated Plus

    • Sellers with highest buyer ratings
    • Returns, money back
    • Ships in a business day with tracking
    Learn More    Top Rated Plus
    ⁣N⁣⁣1⁣⁣⁣ ⁣F⁣L⁣ ⁣O⁣V⁣ ⁣7⁣L⁣⁣⁣ ⁣6⁣T⁣⁣⁣⁣⁣ ⁣⁣⁣⁣
  • All Listings
  • Auction
  • Buy It Now
  • Best Offer
  • Best Match
  • Time: ending soonest
  • Time: newly listed
  • Price + Shipping: lowest first
  • Price + Shipping: highest first
  • Distance: nearest first
  • List View
  • Gallery View

22 results

Sort: Best Match

  • Best Match
  • Time: ending soonest
  • Time: newly listed
  • Price + Shipping: lowest first
  • Price + Shipping: highest first
  • Distance: nearest first
  • Brand: UNI- Selected