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K&N Filters

K&N XStream® Air Flow Assemblies, Filters, and Filter Tops


XStream Air Flow Tops

Replaces the top of your existing round filter.

K&N gives you the power you've been looking for with the new XStream® Air Flow Top. 

Not only does the XStream® add filter area, it actually redirects airflow inside the filter to pull in more air through the side pleats for even greater performance efficiency. Cleanable and reusable, the XStream® Air Flow Top filter delivers the best protection available for your engine, and comes in a wide range of applications. Sizes include 9-, 11- and 14-inch diameters. The 14-inch tops are available in anodized black, red, blue or polished aluminum trim ring.

XStream Air Flow Tops

XStream Air Flow Tops
Dia. Part # Color
9" 66-0901 Black
11" 66-1101 Black
14" 66-1401 Black
Dia. Part # Color
14" 66-1401XB Blue
14" 66-1401XP Polished Alum.
14" 66-1401XR Red
16" 66-1601 Black

XStream Assemblies
Total Height = minimum clearance required above carburetor flange.
 
11 " ASSEMBLIES
Neck Flange Element Height Part # Element Part # Complete Total Assy. Height Color
5-1/8" 2-3/16" E-1200 66-3110 3-1/2" Black
5-1/8" 3-1/2" E-1250 66-3120 4-3/4" Black
5-1/8" 5" E-3680 66-3130 6-1/4" Black
7-5/16" 3-1/2" E-1250 66-3140 4-1/2" Black
           
9 " ASSEMBLIES
5-1/8" 2-3/4" E-3530 66-3150 4-3/8" Black
5-1/8" 2-3/4" E-3530 66-3160 8-1/4"* Black
           
14" ASSEMBLIES
STANDARD 9/16" RAISED BASE
5-1/8" 2-5/16" E-3740 66-3000 3-7/8" Black
5-1/8" 3" E-1650 66-3010 4-5/8 Black
5-1/8" 4" E-3750 66-3020 5-7/8" Black
5-1/8" 5" E-3760 66-3030 6-7/8" Black
           
1-1/4" DROP BASE
5-1/8" 3" E-1650 66-3040 2-3/4" Black
5-1/8" 4" E-3750 66-3060 3-3/4" Black
5-1/8" 5" E-3760 66-3070 4-3/4" Black
           
7/8" DROP BASE
5-1/8" 3" E-1650 66-3050 3-1/8" Black
           
DOMINATOR
7 5/16"
4" E-3750 66-3080 5-1/2" Black
7-5/16" 5" E-3760 66-3090 6-1/2" Black
7-5/16" 6" E-3770 66-3100 7-1/2" Black

XStream K&N Pre-Wrap

XStream® Top PreCharger Wraps

Extends your Filtercharger's service interval in dusty conditions.


XStream® Universal Air Filters - Designed for Serious Racers

XStream® Universal Air Filters - Designed for Serious Powersports Racers  XStream Universal Clamp-on Filter Diagram   XStream® Universal Air Filters - Designed for Serious Racers

(F)
Mounting Flange
Inside Diameter
Base
Diameter
(D)
Top
Diameter
(L)
Filter
Length
(FL)
Flange
Length
(FA)
Flange
Type/Angle
Custom
End Cap
Part #
Pre-Wrap
Part #
Inch mm Inch mm Inch mm Inch mm Inch mm
2-7/16 62 4 102     4-3/4 121 3/4 19 Centered RX-4040-1  
2-7/16 62 4-1/2 114 4 102 6-1/8 155 7/8 16 Centered1 RX-3820-1 RX-3820PK2
2-7/16 62 4-1/2 114 4 102 6-1/8 155 3 76 Angled 20° RX-3800 RX-3820PK2
2-7/16 62 4-1/2 114 6 152 6-1/8 155 5/8 16 Centered1 RX-3810-13 RX-3810DK2
2-7/16 62 4-1/2 114 6 152 6-1/8 155 5/8 16 Centered1 RX-3810XD3,4 RX-3810DK2
2-7/16 62 4-1/2 114 6 152 6-1/8 155 3 76 Angled 20° RX-37703 RX-3810DK2
2-1/2 63 4-1/2 114 4 102 3-13/16 97 3/4 19 Centered RX-4010  
2-1/2 63 6 152 5 127 5-1/2 140 2 51 Centered1 RX-4950 RX-4990DK2
2-1/2 63 6 152 5 127 6-1/2 165 2 51 Centered1 RX-4860 RX-4730DK2
2-3/4 70 3-3/4x4-3/4 95x121 4 102 5-9/16 141 13/16 21 Centered RX-5090  
2-3/4 70 6 152 5 127 5-1/2 140 2 51 Centered1 RX-4960 RX-4990DK2
2-3/4 70 6 152 5 127 6-1/2 165 2 51 Centered1 RX-4870 RX-4730DK2
2-7/8 73 4 102     4-3/4 121 3/4 19 Centered1 RX-4020-1  
3 76 4-1/2 114 6 152 4-5/8 117 7/8 22 Centered RX-3900-13  
3 76 5 127 5 127 7 178 5/8 16 Centered RX-2820 22-8044PK2
3 76 5-1/2 140 5 127 5-9/16 141 1-7/8 48 Centered1 RX-4990 RX-4990DK2
3 76 5-1/2 140 5 127 6-1/2 165 1-7/8 48 Centered1 RX-4730 RX-4730DK2
3 76 5-1/2 140 5 127 6-1/2 165 1-7/8 48 Centered1 RX-4730XD4 RX-4730DK2
3 76 6 152 4 102 8-11/16 220 15/16 24 Centered1 RX-3990-1  
3 76 6x8 152x203 5 127 6-1/2 165 1-7/8 48 Centered1 RX-4750 RF-1042DK2
3-5/16 84 4-7/8 124 4 102 4-1/4 108 15/16 24 Centered RX-4120-1  
3-1/2 89 4 102     5-3/4 146 3/4 19 Centered RX-4140 RU-1470PK2
3-13/16 97 6-13/16 173 6 152 2-1/8 54 3/4 19 Centered RX-4130-1  

1 Filter has molded-in velocity stack
2 Colors available: Black, Blue, Red, Yellow. Not all colors available for each application
3 Filter is reverse tapered    4 Extreme duty off-road filter


Not legal for use in California, or other states with similar emissions control regulations. See product applications for specifications regarding emissions standards and CARB regulations.


 
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