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UNI Two Stage Competition Air Filter - NU-8503ST

  • Part #:
    303171
  • Manufacturer Part #:
    NU-8503ST

MSRP Price: $30.95

Our Price: $25.88

You Save:
$5.07 (16%)
10 on Hand

Overview of UNI Two Stage Competition Air Filter - NU-8503ST

  • Uni-Filters two-stage foam design provides superior filtration while allowing maximum airflow
  • Ultra-Seal filters have a unique grease groove that allows effective application of sealing grease to tightly bond the filter to the surface of the air box

Specs for UNI Two Stage Competition Air Filter - NU-8503ST

Type Air Filter Element
Type Air Filter - OEM Type
Units Each
Weight 0.56 lbs

Cross reference number(s):

NU8503ST

Specs for UNI Two Stage Competition Air Filter - NU-8503ST

Type Air Filter Element
Type Air Filter - OEM Type
Units Each
Weight 0.56 lbs

Fitment for UNI Two Stage Competition Air Filter - NU-8503ST

See if this part fits your ride

Part 303171 fits the following machines

Polaris
  • 2002 Polaris Magnum 500 4x4
  • 2001 Polaris Magnum 500 4x4
  • 1999 Polaris Magnum 500 4x4
  • 2002 Polaris Magnum 500 4x4 RMK
  • 2001 Polaris Magnum 500 4x4 RMK
  • 2000 Polaris Magnum 500 4x4 w/EBS
  • 2000 Polaris Magnum 500 4x4 w/o EBS
  • 2002 Polaris Professional Series 500 4x4 ATV
  • 1997 Polaris Scrambler 500
  • 2002 Polaris Scrambler 500 2x4
  • 2001 Polaris Scrambler 500 2x4
  • 2012 Polaris Scrambler 500 4x4
  • 2011 Polaris Scrambler 500 4x4
  • 2010 Polaris Scrambler 500 4x4
  • 2009 Polaris Scrambler 500 4x4
  • 2008 Polaris Scrambler 500 4x4
  • 2007 Polaris Scrambler 500 4x4
  • 2006 Polaris Scrambler 500 4x4
  • 2005 Polaris Scrambler 500 4x4
  • 2004 Polaris Scrambler 500 4x4
  • 2003 Polaris Scrambler 500 4x4
  • 2002 Polaris Scrambler 500 4x4
  • 2001 Polaris Scrambler 500 4x4
  • 2000 Polaris Scrambler 500 4x4
  • 1999 Polaris Scrambler 500 4x4
  • 1998 Polaris Scrambler 500 4x4
  • 2002 Polaris Scrambler 500 4x4 Freedom
  • 2001 Polaris Scrambler 500 X
  • 2005 Polaris Sportsman 400 4x4
  • 2004 Polaris Sportsman 400 4x4
  • 2003 Polaris Sportsman 400 4x4
  • 2002 Polaris Sportsman 400 4x4
  • 2001 Polaris Sportsman 400 4x4
  • 1997 Polaris Sportsman 500
  • 1996 Polaris Sportsman 500
  • 2000 Polaris Sportsman 500 4x4
  • 1999 Polaris Sportsman 500 4x4
  • 1998 Polaris Sportsman 500 4x4
  • 2000 Polaris Sportsman 500 4x4 RSE (Remington Special Edition)
  • 2008 Polaris Sportsman 500 6x6
  • 2007 Polaris Sportsman 500 6x6
  • 2006 Polaris Sportsman 500 6x6
  • 2005 Polaris Sportsman 500 6x6
  • 2004 Polaris Sportsman 500 6x6
  • 2003 Polaris Sportsman 500 6x6
  • 2002 Polaris Sportsman 500 6x6
  • 2001 Polaris Sportsman 500 6x6
  • 2000 Polaris Sportsman 500 6x6
  • 2012 Polaris Sportsman 500 EFI Forest Tractor
  • 2011 Polaris Sportsman 500 EFI Forest Tractor
  • 2012 Polaris Sportsman 500 Forest
  • 2011 Polaris Sportsman 500 Forest
  • 2012 Polaris Sportsman 500 H.O. 4x4
  • 2011 Polaris Sportsman 500 H.O. 4x4
  • 2010 Polaris Sportsman 500 H.O. 4x4
  • 2009 Polaris Sportsman 500 H.O. 4x4
  • 2008 Polaris Sportsman 500 H.O. 4x4
  • 2006 Polaris Sportsman 500 H.O. 4x4
  • 2005 Polaris Sportsman 500 H.O. 4x4
  • 2004 Polaris Sportsman 500 H.O. 4x4
  • 2003 Polaris Sportsman 500 H.O. 4x4
  • 2002 Polaris Sportsman 500 H.O. 4x4
  • 2001 Polaris Sportsman 500 H.O. 4x4
  • 2004 Polaris Sportsman 500 H.O. 4x4 50th Anniversary Edition
  • 2002 Polaris Sportsman 500 H.O. 4x4 DUSE (Ducks Unlimited Special Edition)
  • 2001 Polaris Sportsman 500 H.O. 4x4 DUSE (Ducks Unlimited Special Edition)
  • 2009 Polaris Sportsman 500 H.O. 4x4 EFI
  • 2008 Polaris Sportsman 500 H.O. 4x4 EFI
  • 2007 Polaris Sportsman 500 H.O. 4x4 EFI
  • 2006 Polaris Sportsman 500 H.O. 4x4 EFI
  • 2006 Polaris Sportsman 500 H.O. 4x4 EFI Browning Hunter Edition
  • 2007 Polaris Sportsman 500 H.O. 4x4 EFI Deluxe
  • 2006 Polaris Sportsman 500 H.O. 4x4 EFI Red Flame
  • 2002 Polaris Sportsman 500 H.O. 4x4 Freedom
  • 2005 Polaris Sportsman 500 H.O. 4x4 Hunter Edition
  • 2008 Polaris Sportsman 500 H.O. 4x4 LE EFI
  • 2007 Polaris Sportsman 500 H.O. 4x4 LE EFI Sagebrush Green/Black
  • 2012 Polaris Sportsman 500 H.O. 4x4 LE Orange Madness
  • 2010 Polaris Sportsman 500 H.O. 4x4 LE Orange Madness
  • 2012 Polaris Sportsman 500 H.O. 4x4 LE Polaris Pursuit Camo
  • 2005 Polaris Sportsman 500 H.O. 4x4 Limited Edition
  • 2005 Polaris Sportsman 500 H.O. 4x4 Mossy Oak Camo
  • 2004 Polaris Sportsman 500 H.O. 4x4 Mossy Oak Camo
  • 2003 Polaris Sportsman 500 H.O. 4x4 Mossy Oak Camo
  • 2003 Polaris Sportsman 500 H.O. 4x4 Richard Petty Special Edition
  • 2001 Polaris Sportsman 500 H.O. 4x4 RSE (Remington Special Edition)
  • 2003 Polaris Sportsman 500 H.O. 4x4 Spruce Metallic
  • 2013 Polaris Sportsman 500 H.O. Bright White
  • 2013 Polaris Sportsman 500 H.O. Indy Red
  • 2013 Polaris Sportsman 500 H.O. Pursuit Camo
  • 2013 Polaris Sportsman 500 H.O. Sage Green
  • 2012 Polaris Sportsman 500 H.O. Touring
  • 2011 Polaris Sportsman 500 H.O. Touring
  • 2010 Polaris Sportsman 500 H.O. Touring
  • 2013 Polaris Sportsman 500 H.O. Touring Indy Red
  • 2013 Polaris Sportsman 500 H.O. Touring Sage Green
  • 2002 Polaris Sportsman 500 H.O. X
  • 2009 Polaris Sportsman 500 Touring EFI
  • 2008 Polaris Sportsman 500 Touring EFI
  • 2008 Polaris Sportsman 500 Touring LE EFI
  • 2009 Polaris Sportsman 500 X2
  • 2008 Polaris Sportsman 500 X2
  • 2007 Polaris Sportsman 500 X2
  • 2006 Polaris Sportsman 500 X2
  • 2007 Polaris Sportsman 500 X2 Deluxe
  • 2008 Polaris Sportsman 500 X2 LE
  • 2007 Polaris Sportsman 500 X2 LE Sunset Red/Black
  • 2005 Polaris Sportsman 600 Twin
  • 2004 Polaris Sportsman 600 Twin
  • 2003 Polaris Sportsman 600 Twin
  • 2007 Polaris Sportsman 700 EFI
  • 2006 Polaris Sportsman 700 Twin
  • 2005 Polaris Sportsman 700 Twin
  • 2004 Polaris Sportsman 700 Twin
  • 2003 Polaris Sportsman 700 Twin
  • 2002 Polaris Sportsman 700 Twin
  • 2005 Polaris Sportsman 700 Twin EFI
  • 2004 Polaris Sportsman 700 Twin EFI
  • 2006 Polaris Sportsman 700 Twin EFI Browning Hunter Edition
  • 2005 Polaris Sportsman 700 Twin EFI Dale Earnhardt, Jr. Edition
  • 2005 Polaris Sportsman 700 Twin EFI Hunter Edition
  • 2004 Polaris Sportsman 700 Twin Mossy Oak Camo
  • 2003 Polaris Sportsman 700 Twin Mossy Oak Camo
  • 2008 Polaris Sportsman 700 X2 EFI
  • 2012 Polaris Sportsman 800 Big Boss 6x6 EFI
  • 2011 Polaris Sportsman 800 Big Boss 6x6 EFI
  • 2010 Polaris Sportsman 800 Big Boss 6x6 EFI
  • 2009 Polaris Sportsman 800 Big Boss 6x6 EFI
  • 2012 Polaris Sportsman 800 EFI
  • 2011 Polaris Sportsman 800 EFI
  • 2010 Polaris Sportsman 800 EFI
  • 2009 Polaris Sportsman 800 EFI
  • 2008 Polaris Sportsman 800 EFI
  • 2007 Polaris Sportsman 800 EFI
  • 2013 Polaris Sportsman 800 EFI Big Boss 6x6 Sage Green
  • 2014 Polaris Sportsman 800 EFI Blue Fire
  • 2007 Polaris Sportsman 800 EFI Deluxe
  • 2012 Polaris Sportsman 800 EFI Forest
  • 2013 Polaris Sportsman 800 EFI Indy Red
  • 2013 Polaris Sportsman 800 EFI Med Yellow
  • 2014 Polaris Sportsman 800 EFI Sage Green
  • 2013 Polaris Sportsman 800 EFI Sage Green
  • 2008 Polaris Sportsman 800 LE EFI Browning Hunter Edition
  • 2008 Polaris Sportsman 800 LE EFI Nuclear Sunset
  • 2007 Polaris Sportsman 800 LE EFI Stealth Black
  • 2009 Polaris Sportsman 800 Touring EFI
  • 2008 Polaris Sportsman 800 Touring EFI
  • 2006 Polaris Sportsman 800 Twin EFI
  • 2005 Polaris Sportsman 800 Twin EFI
  • 2006 Polaris Sportsman 800 Twin EFI Browning Hunter Edition
  • 2005 Polaris Sportsman 800 Twin EFI Camo
  • 2005 Polaris Sportsman 800 Twin EFI Hunter Edition
  • 2006 Polaris Sportsman 800 Twin EFI Silver and Black
  • 2009 Polaris Sportsman 800 X2
  • 2007 Polaris Sportsman 800 X2
  • 2007 Polaris Sportsman 800 X2 Deluxe
  • 2008 Polaris Sportsman 800 X2 LE
  • 2013 Polaris Trail Blazer 330
  • 2012 Polaris Trail Blazer 330
  • 2011 Polaris Trail Blazer 330
  • 2010 Polaris Trail Blazer 330
  • 2013 Polaris Trail Boss 330
  • 2012 Polaris Trail Boss 330
  • 2011 Polaris Trail Boss 330
  • 2010 Polaris Trail Boss 330
  • 2002 Polaris Worker 500 4x4
  • 2001 Polaris Worker 500 4x4
  • 2000 Polaris Worker 500 4x4
  • 1999 Polaris Worker 500 4x4
  • 2002 Polaris Xpedition 425 4x4
  • 2001 Polaris Xpedition 425 4x4
  • 2000 Polaris Xpedition 425 4x4
  • 1997 Polaris Xplorer 500 4x4
4.8 / 5.0
28 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
23
4
0
1
0
Finish
5.0 / 5
Fit
4.6 / 5
Quality
4.9 / 5
Style
4.9 / 5
Value
4.6 / 5
Would you recommend this product?
Yes (2)
Would you recommend this product?
Yes
mice getting into the air box
It was a perfect fit and hopefully with the oil on the foam it will deter mice from chewing on it when it is parked for an extended time
September 1, 2017
Purchased
3 months ago
Fit
5 / 5
Quality
5 / 5
Style
5 / 5
Value
5 / 5
Great Filter, Great Price
I was in need of a filter ASAP and was having a hard time finding one. Thankfully Dennis Kirk had what I needed!!

This is a great filter and a great price.

Thanks GUYS!!
September 16, 2010
Fit
5 / 5
Quality
5 / 5
Style
5 / 5
Value
5 / 5
No Review Title Entered By User
Good fit, noticed increase in performance. Would recommmend.
May 28, 2012
Fit
5 / 5
Quality
5 / 5
Style
5 / 5
Value
5 / 5
Works Great!!!
Worked great even came with the metal mesh inside the filter so it's a true plug and play application. Only down fall is it's NOT pre-oiled so u will need to purchase oil for it.
August 30, 2015
The best
Perfect fit. I use United on all my ATVs
May 6, 2016
Fit
5 / 5
Quality
5 / 5
Style
5 / 5
Value
5 / 5
UNI Filter
Great product, makes the machine breath easier. Its easy to clean and re-oil. I work in the bush all day and it keeps out all the dust and dirt. All around good OEM replacment.
April 27, 2011
Fit
4 / 5
Quality
5 / 5
Style
5 / 5
Value
5 / 5
A must for any application
Buy this and throw your old filter in the trash. Well worth the money.
October 9, 2009
Fit
5 / 5
Quality
5 / 5
Style
5 / 5
Value
5 / 5
No Review Title Entered By User
No Review Text Entered By User
October 9, 2009
Fit
4 / 5
Quality
5 / 5
Style
4 / 5
Value
5 / 5
My quad can now breath.
This filter does a much better job then the stock plus its reusable. Fits perfect and my quad breaths easier. I would recommend.
October 25, 2012
Fit
5 / 5
Quality
5 / 5
Value
5 / 5
No Review Title Entered By User
Appears to be of good quality. About half the cost of OEM.
February 9, 2010
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 1 question Browse 1 question and 1 answer
Is this a throw away filter or is it re-usable?
A shopper on Sep 18, 2017
BEST ANSWER: Re usable. Purchase the cleaner and oil kit and you won't have to buy another air filter. Great product

Instructions and Manuals for UNI Two Stage Competition Air Filter - NU-8503ST

Owner's Manual Owner's Manual PDF 290.4 KiB

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