K&N Universal Air Filters with Custom Caps

K&N Universal Air Filters with Carbon Fiber Top

K&N Carbon Fiber Top Universal Air Filters

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.

Select a universal air filter type below to see a list of all air filters for that type.

Mounting Flange I.D.		Base Diameter		Top Diameter		Filter Length		Flange Length		Flange Type	K&N Air Filter
inch	mm	inch	mm	inch	mm	inch	mm	inch	mm
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
3-1/2*	89	12x6	305x152	9-15/16x3-15/16	252x100	6	152	15/16	24	Centered	RF-1038
3-7/8*	98	12x6	305x152	9-15/16x3-15/16	252x100	7	178	15/16	24	Centered**	RP-5103
3- 7/8*	98	12x6	305x152	9-15/16x3-15/16	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
4-1/2	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
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

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

K&N Titanium Top Universal Air Filters

When it comes to exotic race materials, titanium is well known for it's lightweight and increased strength to weight ratio. Offering lighter weights than conventional filter tops and more rigidity. K&N titanium top filters are the next generation in filter design.

Mounting Flange I.D.		Base Diameter		Top Diameter		Filter Length		Flange Length		Flange Type	K&N Air Filter
inch	mm	inch	mm	inch	mm	inch	mm	inch	mm
6	152	7-1/2	190	4-1/2	114	5	127	1	25	Centered	RT-4590
6	152	7-1/2	190	4-1/2	114	4	102	1	25	Centered	RT-4600
4-1/2	114	5-7/8	149	4-1/2	114	5	127	5/8	16	Centered	RT-4610

K&N Inverted Top Universal Air Filters

A unique approach to filter design and concept. With a filtering top that actually inverts, dropping into the cylinder of the filter. Surface area is greatly increased providing more filtration and air flow. With three colors options, you can now customize your intake to match the rest of your car.

Mounting Flange I.D.		Base Diameter		Top Diameter		Filter Length		Flange Length		Flange Type	K&N Air Filter	Color
inch	mm	inch	mm	inch	mm	inch	mm	inch	mm
2-3/4	70	5-7/8	149	5-1/4	133	5	127	3/4	19	Centered	RR-2801	(Red)
2-3/4	70	5-7/8	149	5-1/4	133	5	127	3/4	19	Centered	RR-2802	(Blue)
2-3/4	70	5-7/8	149	5-1/4	133	5	127	3/4	19	Centered	RR-2803	(Polished)
3	76	6	152	5-1/4	133	5	127	1-3/4	44	Centered**	RR-3001	(Red)
3	76	6	152	5-1/4	133	5	127	1-3/4	44	Centered**	RR-3002	(Blue)
3	76	6	152	5-1/4	133	5	127	1-3/4	44	Centered**	RR-3003	(Polished)

** - Filter has molded-in velocity stack

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