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K&N Air Filters for Injector Stacks

Individual Round Style Injector Stack Air Filters
(Sold individually unless specified otherwise)

K&N Air Filter for "Early Type" Fuel Injectors (Single Stacks) for Chevrolet

K&N Air Filter for "Early Type" Fuel Injectors (Single Stacks) for Chevrolet, Etc.

Filters designed to fit with cut velocity stacks, or straight pieces of exhaust tubing. Rubber filter bases come with molded in velocity stack type radius and step, for smooth bore down from element to tube. Each filter has a rubber top with a stamped K&N logo.

Air Filter
Mounting Flange
Inside Diameter
Injector
Bore Size
Inside Diameter
Air Filter
Diameter x Length
in Inches
Straight Neck
Mounting Flange
5° Angle Neck
Mounting Flange
1-7/8" (47.5mm)1-13/16" (46mm)3-1/2 x 4RD-0450N/A
3-1/2 x 5RD-0460N/A
3-1/2 x 6RD-0470N/A
2-1/8" (54mm)2-1/16" (52.5mm)3-1/2 x 4RD-0500RB-0500
3-1/2x 5RD-0510RB-0510
3-1/2 x 6RD-0520RB-0520
2-1/4" (57mm)2-3/16" (55.5mm)3-1/2 x 4RD-0600RB-0600
3-1/2 x 5RD-0610RB-0610
3-1/2 x 6RD-0620RB-0620
2-1/2" (63.5mm)2-7/16 (62mm)3-1/2 x 4RD-0700RB-0700
3-1/2 x 5RD-0710RB-0710
3-1/2x 6RD-0720RB-0720
2-5/8" (66.5mm)2-9/16" (65mm)4 x 4N/ARB-0800
4 x 5N/ARB-0810
3" (76mm)2-15/16" (74.5mm)4-1/2 x 4N/ARB-0900
4-1/2 x 5N/ARB-0910

K&N Air Filter for Kinsler Non-Siamesed Fuel Injector Stacks

K&N Air Filter for Kinsler Non-Siamesed Fuel Injector Stacks

Round filters fit uncut ram tube bells and clamp securely to the lip. Will fit any injection setup that has a minimum of 4-1/4" center to center, and parallel ram tubes. Each filter has a rubber top with a stamped K&N logo.

Ram TubeFilter SizeInjector ModelK&N Air Filter (Single)
3-7/8"4-1/4"B,4"T,6"HN/ARD-6000
3-5/8"351-F-8RD-6010
3-7/8"N/ARD-6020

K&N Air Filter for Hilborn 4, Injectors Fitted to Honda and Kawasaki Engines in T.Q. Midgets

K&N Air Filter for Hilborn 4, Injectors Fitted to Honda and Kawasaki Engines in T.Q. Midgets

Air filters designed to fit over stock, uncut ram tubes. Filters come complete with rubber mounting adapters. To install, fit rubber adapters around ram tube bases and fit filters over ram tubes and clamp onto adapters in desired position. Air filters come with chrome end caps. Fits #45-K-4A and #45-H-4B Hilborn injectors and are packaged in sets of four.

Filters measure 3" O.D. x 6"L and fit 1-1/2" Ram Tubes. Set of four, RD-1004


K&N Air Filter for Hilborn Injectors for Blowers and Turbos

K&N Air Filter for Hilborn Injectors for Blowers and Turbos

Air filters designed to fit over stock, uncut ram tube. Filter comes complete with rubber mounting adapter. To install, fit rubber adapter around ram tube base. On early screw-on ram tube type, cut adapter with razor blade and wrap around tube. Fit filter over ram tube and clamp onto adapter in desired position. Air filters come with chrome end caps.

Hilborn Injector #525, for Magnuson Super Chargers. Used on Harley Davidson and V.W. blown engines. Filter fits 2-1/8" ram tube. Measures 6" dia. top, 5-1/2" dia. base, 6" longRD-1100
Hilborn Injector #523, for 60 c.i. Magnuson Blower Head. Filter fits 2-1/2" ram tube. Measures 7" dia. top, 7" dia. base, 6" longRD-1200
Hilborn Injector #524, for 80 c.i. Magnuson Blower Head. Filter fits 3" ram tube. Measures 7" dia., 6" long.RD-1300
Hilborn Injector #F414A, for Turbocharged tractor, air filter clamps over 4" lip on cast ram tube. Air filter measures 7" dia., 6" long Rubber mounting adapter not required. Filter mounts directly to injectorRD-1400
Hilborn Injector #F414A, for Turbocharged tractor, air filter clamps over 4" lip on cast ram tube. Air filter measures 7" dia., 8" long Rubber mounting adapter not required. Filter mounts directly to injectorRD-1410

K&N Dual Oval Air Filter for "Late Type" Hilborn Siamese Stacks

K&N Dual Oval Air Filter for "Late Type" Hilborn Siamese Stacks

Filters are designed to be used with stock, uncut, siamesed ram tubes. Comes with removable aluminum top plate. To install, push Ram Tubes through rubber base and clamp at desired height. Oval top plate measures 9"L x 5-1/2"W, total height is 6-3/4".

Injector Tube
Outside Diameter
Injector
Inside Diameter
Injector
Model#
Center to Center
Measurement of Bores
K&N Air Filter
2-1/8" (54mm)2-1/16" (52.5mm)R2.44"RD-4200
2-1/4" (57mm)2-3/16" (55.5mm)Q2.44"RD-4400
2-1/2" (63.5mm)2-7/16" (62mm)P2.70"RD-4600*
2-5/8" (66.5mm)2-1/2" (63.5mm)327-C-842.70"RD-4650
2-3/4" (70mm)2-5/8" (66.5mm)327-C-82.87"RD-4669**
3" (76mm)2-15/16" (74.5mm)F3.20"RD-4800
3-1/8" (79.4mm)3" (76mm)396-C-8M3.20"RD-4850

 

* Adapter kit needed to convert the air cleaner when equipped with 2-1/4" restrictor stacks is # 85-4600, and kit includes 8 adapters.
** Packaged four per box. When ordering singles specify #RD-4660 right side or #RD-4670 left side.


K&N Dual Oval Air Filter for Kinsler- Siamese Stacks

K&N Dual Oval Air Filter for Kinsler- Siamese Stacks

These air filters are designed for use with the Kinsler fuel injection system for Pontiac and Chevrolet small block V8. Air filters come with removable top plate, to install, push injector tubes through rubber base and clamp at desired height. Oval top plate is 9"L x 5-1/2"W. Total height of air filter is 6-3/4".

Injector Tube
Outside Diameter
Injector
Inside Diameter
Center to Center
Measurement of Bores
K&N Air Filter
2-5/16" (58mm)2-3/16" (55.5mm)2.80"RD-5000
2-3/8" (60mm)2-1/4" (57mm)2.80"RD-5000
2-9/16" (65mm)2-7/16" (62mm)2.80"RD-5010
2-5/8" (66.5mm)2-1/2" (63.5mm)2.80"RD-5020

K&N Dual Oval Air Filter for "Late Type" Hilborn and Other Injectors for V.W. Air-cooled Engines

K&N Dual Oval Air Filter for "Late Type" Hilborn and Other Injectors for V.W. Air-cooled Engines

Air filters designed to fit over stock, uncut ram tubes. Comes with removable aluminum top plate. To install, push ram tubes through rubber base and clamp at desired height. Oval top plate measures 9"L x 5-1/2"W, total height is 6-3/4".

Air Cleaner
Mounting Flange
Inside Diameter
Injector
Bore Size
Inside Diameter
Hilborn
Model#
Center to Center
Measurement of Bores
K&N Air Filter
1-3/4" (44.5mm)1-11/16" (43mm)#1600 V-43.312"RD-3400
1-7/8" (48mm)1-13/16" (46mm)31600 V-4B3.312"RD-3500
2-1/8" (54mm)2-1/16" (52.5mm)#2000 V-43.375"RD-3600
1-3/4" (44.5mm)1-11/16" (43mm)ARPM Rotary F/I2.700"RD-4900

K&N Dual Oval Air Filter for "Early Type" Hilborn and Other Injectors for V.W. Air-cooled Engines

K&N Dual Oval Air Filter for "Early Type" Hilborn and Other Injectors for V.W. Air-cooled Engines

Air filters designed to fit over stock, uncut ram tubes. Fits early type tubes with right angle mounting flange, held on with four screws. Cleaners come complete with rubber mounting adapters. To install, cut adapter with a razor blade and wrap around ram tube. Drop one-piece filter over ram tubes and clamp onto adapters in desired position. Oval top plate measures.

Air Cleaner
Mounting Flange
Inside Diameter
Injector
Bore Size
Inside Diameter
Hilborn
Model#
Center to Center
Measurement of Bores
K&N Air Filter
1-3/4" (44.5mm)1-11/16" (43mm)(Early)1600 V-43.312"RD-3200

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