K&N Custom Assemblies with Carburetor Applications Custom Air Filters for Single or Two Barrel Carburetors K&N Custom Air Filter kits are designed to allow the maximum performance from your carburetors, yet keep the dirt on the outside where it belongs. Show quality to fit racing vehicles with VW, Pinto or any other engine equipped with these performance carburetors. All assemblies come with custom chrome top and base plates and the Famous K&N High-Flow Washable Air Filter. All assemblies are convenient to clean and service. These filters are legal ONLY for racing vehicles. ApplicationFilter Style*Outside DimensionHeightK&N FilterFoot NoteK&N Assembly Autolite 32/36 (2bbl.)DDO5-1/2 x 91-3/4E-3441356-1010 Dellorto DHLA 40,45,48SDO4-1/2 x 71-3/4E-33211256-1310 Dellorto DRLA 36,40,45,48DDO4-1/2 x 71-3/4E-33211256-1690 Fomoco 32/36 (2bbl.)DDO5-1/2 x 91-3/4E-3441356-1010 Hitachi (73-74 Datsun 240,260Z)SDR5-7/83-1/4E-31901,1156-1430 Holley 5200,5210 (32/36)DDO5-1/2 x 91-3/4E-3441356-1010

Holley 5200 w/EFC DDO4-1/2 x 71-3/4E-3315-------------- ISO (70-72 Datsun 240Z)SDR5-7/83-1/4E-31906,1056-1410 Kadron-Solex H40 E/S (Brazil)DDR74E-251013,1656-1490 Mikuni-Solex 36 PHHSDO4-1/2 x 71-3/4E-332156-1370 Mikuni-Solex 40,44,48 PHHSDO4-1/2 x 71-3/4E-33211256-1310carburetor cleaner air intake Motorcraft 32/36 (2bbl.)DDO5-1/2 x 91-3/4E-3441356-1010air conditioner compressor coil cleaner SK RacingSDO4-1/2 x 73-1/4E-334156-1350whole house air purifier do they work Solex 40 P11 (Porsche 912)DDO5-1/2 x 93-1/4E-346115,1756-1255 Solex 34/34 progressiveDDO4-1/2 x 71-3/4E-33213,2156-1701 SU 1-1/2 Bore (Non-UK)SDR5-7/81-3/4E-31801056-1390 SU 1-1/2 Bore HIF4,HIF6, HIF38SDR5-7/8/8b/3-1/2t2-11/16E-915656-9320

SU 1-3/4 Bore (not HIF6/Non-UK)SDR5-7/81-3/4E-31801056-1400 SU 1-3/4 Bore HIF6SDR5-7/8/8b/3-1/2t2-11/16E-915656-9330 SU 1-3/4 Bore HS6SDR5-7/8/8b/3-1/2t2-11/16E-915656-9327 SU (70-72 Datsun 240Z)SDR5-7/81-3/4E-319056-1410 SU (73-74 Datsun 240,260Z)SDR5-7/81-3/4E-31901,1156-1430 Custom Air Filters for Weber CarburetorsAll assemblies come with custom chrome top and base plates (except IDA Triple) and the Famous K&N High-Flow Washable Air Filter. All assemblies are convenient to clean and service. DAR,DIR,DIF 32/36DDO5-1/2 x 91-3/4E-3441356-1010 DATRA,DATRE 34/36DDO5-1/2 x 91-3/4E-34413,2056-1651 DCD,DAS,DCLD,DCS 28/36DDO4-1/2 x 72-3/4E-3325356-1640 DCN 40-14DDO4-1/2 x 73-1/4E-3341 56-1080 DCNF 36,40,42,44DDO4-1/2 x 71-3/4E-33211556-1110 DCOE 40,42SDO4-1/2 x 71-3/4E-3321856-1270 DCOE 45,48SDO4-1/2 x 71-3/4E-3321856-1310 REC6-1/2 x 7-1/21-3/4E-3960 8------- DCOE 50,DCOE SP48,55SDO4-1/2 x 73-1/4E-3341956-1710 SDO5-1/2 x 93-1/4E-3461 956-1720

DFTDDO5-1/2 x 93-1/4E-3461 56-1730 DFB,DFD,DFE,DFV 32/36DDO5-1/2 x 91-3/4E-3441356-1010 DDO5-1/2 x 93-1/4E-3461 2,356-1020 DDO4-1/2 x 71-3/4E-3321 56-1030 DDO4-1/2 x 73-1/4E-3341 56-1040 DMTR 34/36DDO5-1/2 x 91-3/4E-34413,2056-1651 IDA 48DDO5-1/2 x 93-1/4E-3461 56-1210 DDO5-1/2 x 94-1/2E-3471 56-1220 DDO5-1/2 x 95-1/2E-3481 56-1230 IDA Triple 40,46-Porsche F6 engDDO5-1/2 x 123-1/4E-3671756-1770-2 IDF 40,44,48,44MXDDO4-1/2 x 71-3/4E-3321 56-1160 DDO4-1/2 x 73-1/4E-3341 56-1170 DDO5-1/2 x 91-3/4E-3441 ------- DDO5-1/2 x 93-1/4E-3461 56-1190 * Filter Styles: DDO = down draft oval DDR = down draft round SDO = side draft oval SDR = side draft round REC = rectangle FOOTNOTES 1) 1-15/16" X 19/16" rectangle opening in baseplate 2) includes cast aluminum velocity stack 3) 1/2" vent elbow included 4) fits Holley 5200 equipped with electronic feedback solenoid 5) oval filter assembly is turned 90 degrees to the base of carburetor flange (4 stud base) 6) 1-3/4" opening in baseplate 7) cast aluminum top and base powder coated black 8) must remove Weber airhorns 9) works with Weber airhorns 10) 2 bolt mount 11) 3

bolt mount 12) will not work with velocity stacks 13) 2-5/8" flange, will not fit VW engine with large fan shrouds 14) special offset base allows use of larger fan shrouds on VW engines 15) mounting bolt kit included 16) E-2410 fits original Kadron filter case 17) includes optional vent 18) must use separate velocity stacks to mount filter 19) new improved racing version has stronger center tree and 4 springs to hold top plate 20) filter is turned 90 degrees to centerlines of carburetor bore 21) filter is mounted centered to carburetor bores The resource requested could not be found on this server! Proudly powered by LiteSpeed Web ServerPlease be advised that LiteSpeed Technologies Inc. is not a web hosting company and, as such, has no control over content found on this site. 5 to 5.99 in. Check Availability and Pricing Information 2 to 2.99 in. 4 to 4.99 in. 3 to 3.99 in. Check Availability and Pricing Information How Tos / Tech How to Match Air Filter Size to Your Engine

For maximum airflow, you want the largest air cleaner element or assembly that will fit the confines of the engine or engine compartment. For example, the large hi-po air cleaners used on musclecar-era Chevrolets (like this L88 Corvette baseplate/element combination) are ideally suited for single carburetor applications. Manufacturers such K&N offer similar air cleaner configurations. Shape and size dictate the ability of the air filter element to flow the maximum amount of air into the engine. In the case of a K&N element, you can use the diameter of the air filter to help determine sufficient area for the airflow required. K&N’s testing has shown that for most two and four barrel carburetors, airflow is greater when the diameter of the air filter is large in comparison to the height. For example, a 10-inch diameter by two inch tall element will generally flow better than an element five inches in diameter and four inches tall. If space permits, K&N advises using a filter element with a height 1/5 to 1/4 that of the air filter’s diameter.

Back in the day, if you wandered over to the NHRA Pro Stock Truck pits between rounds you’d find something pretty interesting. Nine times out of ten, those race trucks used some form of filter element in their air intake system. They were there to filter out dirt and dust, of course. But more critically, those filters were being used to straighten and diffuse the air before it entered the carburetors. The air cleaner elements weren’t hurting performance—they were improving it. And an air cleaner can do the same thing for your high performance street or race car. Obviously, you need to select an air cleaner with a filter element large enough to do the job. For example, the 14-inch by three-inch element in 1960s-era Chevy muscle car air cleaners is ideally sized for many single carburetor applications. It’s so good, in fact, that aftermarket manufacturers offer clones of the Chevy filter. Companies like K&N offer many different types of air filter elements and air cleaner assemblies to fit varied carburetor sizes and shapes.

Some (especially circle track models) are even offset to clear distributors and other engine hardware. What’s more, the properly-sized air cleaner assembly with a high-flow element can actually increase the amount of airflow into the carburetor. Shape and size dictate the ability of the air filter element to deliver maximum airflow to the engine. When it comes to the shape, K&N’s flow bench data has shown that for typical two and four barrel carburetors (and fuel injection throttle bodies), airflow is greater when the diameter of the filter element is larger in comparison to the height. For example, a 10-inch diameter by two-inch tall element will generally flow better than an element five inches in diameter and four inches tall. If space permits, K&N advises using a filter element with a height 1/5 to 1/4 of the air filter’s diameter. Element diameter in relation to carburetor or throttle body throat is also important. The element should be at least three times larger than the throat.

The one exception to K&N’s rule is when a filter element is clamped to a long runner, like with cold air intakes for EFI engines. The straighter the airflow shot into the intake tube, the less restriction there will be. In this case, an element that has a height two to four times greater than the diameter will work best. Once you have determined the proper shape, you can determine element size. Two factors dictate the filter size: the engine’s cubic inch displacement and RPM at maximum horsepower. Knowing those figures, use this formula to determine the minimum effective filtering area an engine requires, where A equals filtering area: A = (C.I.D. x RPM) / 25,500 With the effective filtering area established, we can determine the required element height (including the rubber sealing edges), where H equals height and D the estimated maximum element diameter that will fit in the engine bay. The .75 figure is to account for the element’s rubber sealing edges: H = A / (D x 3.14)  + .75