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K&N Carbon Fiber Composites

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

Leave it to K&N to come up with products that have both cosmetic appeal as well as deliver outstanding performance. K&N's Carbon fiber composites have attractive cosmetic appeal, and the outstanding stiffness to weight ratio that is needed to stay competitive in today's racing industry. Carbon fiber composites have taken the method traditionally associated with fiberglass and perfected it to a precise science with outstanding performance as the result. The process of advanced composites controls resin and fiber content to exacting tolerances. Though traditional methods have proven successful in producing a variety of products; advanced composite products can be engineered considerably stronger and assembled with even greater accuracy. K&N's Advanced Composite Division offers products to really get excited about.

Carbon fiber, as a raw material, has been treated to handle heat from below 0 to 2500 degrees Fahrenheit. In most cases the limiting factor is the matrix or resin system, not the reinforcement material such as carbon fiber, fiberglass or Kevlar. Epoxies are no longer a simple brush on mix of basic compounds. Chemists have spent years maximizing the function of the matrix by blending epoxies with ceramics and a number of other ingredients. It is a precise science where strength, durability, function and temperature all have to be considered. Our products are engineered with specific resin systems for application specific needs. These products must take into consideration such things as: fire retardant resins, ceramic blends to handle high heat and flexible systems for damage tolerance. This same kind of consideration goes into everything K&N makes.


K&N Carbon Fiber Air Cleaner Lid - Top Plate 85-6840

K&N Carbon Fiber Air Cleaner Lid - Top Plate

K&N has taken advantage of the lightness, strength and durability of carbon fiber to bring you our Carbon Fiber Lid. This new lid combines all the necessary features for racing with the good looks only carbon fiber can provide. Easy to install. This top lid fits K&N air filters part numbers E-3740, E-1650, E-3743, E-3745, E-3730, E-3750, E-3732, E-3760, E-3770 or any round air filter with an 14" outside diameter. At 4.6 oz this lid weighs 1/4 as much as our standard chrome top plate.

K&N Carbon Fiber Top Plate 85-6840 - 14" O.D. top plate Carbon fiber (center rises 1")


K&N Billet Aluminum Spoked Air Cleaner Lids

A recent addition to our Custom 66 Series, these 14" assemblies feature a billet aluminum spoked air cleaner lid with a carbon fiber insert. Both fit 5 1/8" carburetor flanges. Full assemblies using these lids are shown on Custom 66 page. For all K&N custom air cleaner lids visit K&N Air Filter Assembly Custom Lids and Tops.

K&N 10 Spoke Billet Aluminum Air Cleaner Lid 85-6850
K&N 10 Spoke Billet Aluminum Air Cleaner Lid 85-6850

K&N 5 Spoke Billet Aluminum Air Cleaner Lid 85-6848
K&N 5 Spoke Billet Aluminum Air Cleaner Lid 85-6848


K&N Universal Air Filters with Carbon Fiber Tops

K&N Universal Air Filters with Carbon Fiber Tops

With advance composite technology, carbon fiber provides the ultimate in strength with minimal weight. Carbon fiber provide 1/3 less weight than conventional filter top construction material. Smooth, glass like finish provides the ultimate in finish, fit, function and performance only available from K&N. For all K&N universal air filters visit the K&N Universal Air Filters page.

Mountaining Flange Inside Diameter Base Diameter Top Diameter Filter Length Flange Length Flange Type Part#
Inch mm Inch mm Inch mm Inch mm Inch mm
1 15/16 49 3 76 3 76 3 76 5/8 16 Centered ** RP-5164
1 15/16 49 3 76 3 76 4 102 5/8 16 Centered ** RP-5119
3* 76 6 152 5 127 6 152 1 25 Centered ** RP-5044
3 76 6 152 5 127 6 152 1 3/4 44 Centered ** RF-1047
3 3/8 86 6 152 4 1/2 114 9 229 1/2 13 Centered ** RP-5118
3 1/2 89 5 1/2 140 4 1/2 114 6 1/2 165 1 1/4 32 Centered ** RP-4630
3.5* 89 12x6 305x152
3 15/16
9 5/16x 252x100 6 152 15/16 24 Centered RF-1038
3 7/8* 98 12x6 305x152
3 15/16
9 5/16x 252x100 7 178 15/16 24 Centered ** RP-5103
3 7/8* 98 12x6 305x152
3 15/16
9 5/16x 252x100 6 152 15/16 24 Centered ** RP-5115
3 7/8* 98 12x6 305x152
3 15/16
9 5/16x 252x100 6 152 15/16 24 Centered RP-5070
4 102 5 3/8 136 4 102 5 1/2 140 5/8 16 Centered RP-4660
4 102 5 3/8 136 4 102 5 1/16 129 5/8 16 Centered RP-4930
4 102 5 3/8 136 4 102 7 178 5/8 16 Centered RP-4970
4 102 5 3/8 136 4 102 6 1/2 165 5/8 16 Centered RP-4980
4 1/8 105 18 3/4x5 476x127 16 3/4x3 425x76 4 13/16 122 2 51 Centered RP-5135
4 1/4 108 5 7/8 149 4 1/2 114 6 3/4 171 5/8 16 Centered RP-5167
4 1/2 114 5 7/8 149 4 1/2 114 6 152 5/8 16 Centered RP-4740
4 1/2 114 5 7/8 149 4 102 6 152 5/8 16 Centered RP-5101
5 127 6 1/2 165 4 1/2 114 5 5/8 143 1 25 Centered RP-5113
6x2* 152x51 12x3 1/2 305x89 11x2 1/2 279x64 5 3/4 146 7/8 22 Centered RF-1050
6 152 7 1/2 190 4 1/2 115 4 102 1 25 Centered RP-4600
8 3/4x3 1/4 222x83 18 3/4x5 476x127 16 3/4x3 425x76 4 13/16 22 2 51 Centered RP-5161

 

* - Flange Dimension is outside diameter
** - Filter has molded-in velocity stack


K&N Universal Air Box Assemblies

Light weight yet durable, K&N's Universal Air Boxes are a must for any racer currently using traditional multi-siamese stacks. Constructed from ultra-light weight carbon fiber and weighing in at just under 3-1/2 lbs, K&N's Universal Air Box Assemblies provide ample air flow for your racing needs.

K&N Large Sprint Car Air Box
K&N Large Sprint Car Air Box

Siamese Stacks
Siamese Stacks

Medium and Small Sprint Car Airbox
Medium and Small Sprint Car Airbox


K&N Carbon Fiber Injection Stack Filter 100-8580

K&N Carbon Fiber Injection Stack Filter

Lightweight, yet durable, K&N's Carbon Fiber Injector Stack Filter 100-8580 is a must for any racer currently using traditional multi-Siamese stacks. Constructed from ultra-light weight carbon fiber. A Carbon Fiber Injector Stack Filter provides ample airflow for your racing needs. The base does not have any holes cut through, so it can fit most any stack configuration. Once the base has been put in place, simply slip the main filter assembly over the stacks. Supplied spring clip clamps keep the filter securely together for positive seal and ease of servicing. Extra large box. 27 3/16" x 16 1/8" OD.

If maximum airflow is what you are looking for, this airbox is your ticket, flowing at up to 2700 CFM. K&N has constructed the base portion of this assembly from carbon fiber to fit from 2"to 2-5/8" Hilborn, Kinsler and Engler stacks. This allows you to do away with clamping a filter on to each individual ram tube. Once the base has been put in place, simply slip the main filter assembly over the stacks. Easily done and at only 3.4 lbs., this airbox will allow your vehicle’s engine to breathe all the clean air it needs to make you a winner. These air box assemblies are used on sprint cars as well as other racing vehicles where light weight and high air flow are desired. As with all K&N air filters, universal air box assemblies are washable and reusable air filters. Simply use K&N air filter oil and cleaner to service your filter.


K&N Universal Air Box Assemblies by Type

Small Sprint box w/ filter top, no holes in base, fits two injectors**100-8569*
Medium Sprint box w/ filter top, no holes in base, fits four injectors**100-8570*
Medium Sprint box base, no holes100-8573
Medium Sprint box with top/sides only100-8575
Medium Sprint box 4" Tall with hardware100-8576
Solid Medium Base100-8577
Medium 4” Height Air box, no base100-8578
Large Sprint box with solid base, spring clips and 2.5” air horn seals100-8558
Large Sprint box with solid base, spring clips and 2.75” air horn seals100-8559
Large Sprint box base, Hilborn rotary injection base, with hardware100-8574
Large Sprint box w/ filter top 6 3/4 " center spread**100-8562*
Large Sprint box w/ carbon top 6 3/4 " center spread**100-8563*
Large Side filter w/ filter top only**100-8564
Large Base Plate Only, holes are not pre cut100-8565
Large Side filter w/ carbon top only**100-8566
Large Sprint box w/ filter top, no holes in base**100-8567*
Large Sprint box w/ filter top 7" center spread**100-8568*
Large Sprint box base plate with 4 1/2" c-c, holes100-8571
Large Carbon Fiber box with base and spring clamps100-8580
Large Base Plate Only 12 5/8" x 17 3/4" no rubber or holes**100-8590*
Large Box 4" Tall100-8591
Large Carbon Fiber box with base – 4 rubber inserts and spring clamps100-8592

 

* These are complete units, base plate, side filter and top
** Side filter is glued to top on all units


Spring Clip Clamps for K&N Universal Air Box Assemblies

Spring Clip Clamps for K&N Universal Air Box Assemblies

4 Pack - 0.750" X 4.45" - 85-83895
6 Pack - 0.750" X 4.45" - 85-83897
4 Pack - 0.750" X 5.99" - 85-83891
6 Pack - 0.750" X 5.99" - 85-83893
K&N Drycharger® Air Filter Wrap 100-8592DK for Sprint Car Style Air Box

K&N DryCharger® Air Filter Wrap for Sprint Car Style Air Box 100-8592

Black Air Filter Wrap 100-8592DK


K&N PreCharger® Air Filter Wraps for Sprint Car Style Air Boxes

K&N PreCharger® Air Filter Wraps

Small Sprint Car Style Air Box Filter Wraps

Black Air Filter Wrap 100-8569PK
Red Air Filter Wrap 100-8569PR
Yellow Air Filter Wrap 100-8569PY

Medium Sprint Car Style Air Box Filter Wraps

Black Air Filter Wrap 100-8570PK
Red Air Filter Wrap 100-8570PR
Yellow Air Filter Wrap 100-8570PY

Large Sprint Car Style Air Box Filter Wraps

Black Air Filter Wrap 100-8562PK
Red Air Filter Wrap 100-8562PR
Yellow Air Filter Wrap 100-8562PY


K&N Carbon Fiber Hood Scoops, Pans, Liners & Plugs

NHRA Pro Stock Carbon Fiber Composite Hood Scoop

This ultra strong and light carbon fiber scoop was designed using computational fluid dynamics (CFD). This design provides an 18 lb. decrease in drag. The K&N scoop also produces more even air distribution inside the scoop, which helps naturally aspirated engines run better and produce more power. In addition to NHRA's Pro Stock class, the scoop can also be used in Super Stock, Super Gas, Top Sportsman, Pro Mod classes and other racing applications. Find K&N performance air filters for intake scoops on the K&N Racing Scoop Filters page.


NHRA Pro Stock Carbon Fiber Composite Hood Scoop 100-8506
NHRA Pro Stock Carbon Fiber Composite Hood Scoop 100-8506

NHRA Pro Stock Carbon Fiber Composite Hood Scoop 100-8517
NHRA Pro Stock Carbon Fiber Composite Hood Scoop 100-8517

Carbon Fiber Hood Scoop Plug 100-8519
Carbon Fiber Hood Scoop Plug 100-8519

100-8506 50 sq. inch, D-Shaped Opening, 10" Height
100-8508 50 sq. inch, D-Shaped Opening, 11" Height
100-8515 Gen 2, 50 sq. inch D-Shaped Opening, 12" Height
100-8516 Gen 2, 54 sq. inch D-Shaped Opening, 12" Height
100-8517 Gen 2, 58 sq. inch D-Shaped Opening, 12" Height
100-8509 Inner Hood Scoop Pan for Door Car Scoop with dual 7.25" Dominator Carbs
100-8510 Inner Hood Scoop Pan for Door Car Scoop with dual 8" Braswell Carbs
100-8520 Inner Hood Scoop Pan for Door Car Scoop with dual 5.5" Braswell Carbs
100-8514 Inner Hood Scoop Pan for Door Car Scoop - Uncut/Blank
100-8511 Carbon Fiber Inner Scoop Liner Set
100-8518 Carbon Fiber Hood Scoop Plug for 58 sq. inch hood scoop. (works with 100-8517)
100-8519 Carbon Fiber Hood Scoop Plug for 50 sq. inch hood scoop. (works with 100-8506, 100-8508, 100-8515)

K&N Composite Carbon Fiber Dragster Intake Scoop 100-8503

K&N Composite Carbon Fiber Dragster Intake Scoop

K&N carbon fiber intake scoops were designed with the latest technology available by taking the air principals and the cosmetic appeal of carbon fiber to produce an attractive air scoop. Find K&N performance air filters for intake scoops on the K&N Racing Scoop Filters page.

100-8503 Includes pan. Does not include filter.
100-8504 Includes standard 4 BBL assembly, scoop and base
100-8505 Includes dominator assembly, scoop and base
100-8512 Gen 2 Scoop and Pan, 50 sq. inch opening

These filters are legal ONLY for racing vehicles. Not applicable, nor intended for use on emission controlled street or highway vehicles.