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Part number: RX-3770
Universal product
Product Details
K N RX-3770 K N Univ Clamp On Filter
Products specifications
Air Cleaner Top Style X-Stream
Air Filter Bottom Measurement 4.500 in. diameter
Air Filter Shape Round Tapered
Air Filter Style Conical
Air Filter Top Measurement 6.000 in. diameter
Base OD 4.5in(114mm)
Base Outside Diameter 4.5 in (114 mm)
Filter Color Red
Filter Material Cotton gauze
Filter Re-Oiling Amount 0.73 oz (21 ml)
Flange Angle 20 degrees
Flange Diameter 2.438in(62mm)
Flange Inside Diameter 2.438 in (62 mm)
Flange Length 3in(76mm)
Flange Offset 0in(0mm)in
Flange Type Angled
Flanges 1
Footnote 1 1/4-20 Jack Nut Inserted Into Filter Top
Footnote 2 Base Has 25/64" Vent
Height 6.563 in (167 mm)
Inlet Flange Inside Diameter (in) 2.438 in.
Length 6.125in(156mm)
Length (in) 6.125 in.
Notes With 20 degree angled flange and x-stream top.
Package Contents 1 Air Filter
Package Quantity 1
Product Style Round Tapered Universal Air Filter
Quantity Sold individually.
Top Material/Finish None
Top OD 6in(152mm)
Top Outside Diameter 6 in (152 mm)
Air Filter Large End Diameter 6 in (152 mm)
Weight 1.6 lb (0.7 kg)
K&N RX-3770 Universal Air Filter Cone Filter X-Stream Top

K&N?s Universal Air Filters are designed and manufactured for a wide variety of applications. Regardless of the angle, offset diameter of the air intake, there is a K&N Universal air filter for your equipment. All filters are constructed with ultra-strong molded pliable rubber flanges which absorb vibration and allow for secure attachment and can also be stretched for up to 1/16? (1.5mm) to fit in-between sizes. K&N Universal air filters are available in round, tapered (cone style) and oval designs, for just about any special application.
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Very high level of responsive customer service, wow!  And the items arrived immediately, so fast I thought there might be a mistake.  :D
thx Sean!
I was a little concerned at first.  They advertise same-day order processing, and they said my part was in stock. However, my order took three business days (plus the weekend) to finally ship.  As long as the right part arrives, I'll be happy.  The price was $100 less than everywhere else, so that can't be beat.
My first order and I must say, very impressive! Awesome prices and super-fast shipping direct from the manufacturer. Couldn't ask for more! I will return.
This was my first order with Autoplicity. Their prices were great, and the ordering process very easy.  I was a little frustrated at first, as the order didn't arrive as expected. When I called, it took a little work, but I finally got the info that it was shipping from the manufacturer, and did get the tracking info.  The parts arrived when tracking said it should.  Would I place another order with Autoplicity?  Short answer is yes!
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