K&N Universal Performance Air Filters RX-4870 Weld On Diff Filler Calibrating a speedometer isn't a

Calibrating a speedometer isn't a great deal of fun either

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They have air core meter design

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K&N Universal Performance Air Filters RX-4870 Weld On Diff Filler Calibrating a speedometer isn't aBrand: K&N Manufacturer's Part Number: RX 4870 Part Type: Air Filter Elements Product Line: K&N Universal Performance Air Filters Automotive Fittings Part Number: KNN RX 4870 UPC: 024844094674 Air Filter Type: Oiled Air Filter Style: Conical flanged Inlet Flange Inside Diameter (in.): 2. 75 Air Filter Length (in.): 6. 50 Air Filter Top Measurement: 5. 000 in. diameter Air Filter Bottom Measurement: 6. 000 in. diameter Filter Material: Cotton gauze