Please check the OEM and Ryco part numbers including the shape of the filter to make sure the filter is correct.

K&N Air Filter Spec  for Honda Civic 33-2342
Height: 1 in (25 mm)
Outside Length: 8.813 in (224 mm)
Outside Width: 7.688 in (195 mm)
Weight: 0.83 lb (0.38 kg)

Product Box Height 11.56 in (294 mm)
Product Box Length 10.44 in (265 mm)
Product Box Width 1.75 in (44 mm)

OEM Air Filter part number for Honda 1.8L Civic:
HONDA  17220RNAA00
HONDA   PPTD30
FRAM      CA10165
RYCO     A1578
REPCO  RAF280    
SILVER  AF280SL  
 

K&N 33-2342 fits the following NZ Registered vehicles:

HONDA CIVIC
FD1 1.8L R18A# SOHC 16v MPFI 4cyl 4dr FWD [01/06 - 12/11]

HONDA CROSSROAD
RT1 1.8L R18A# SOHC 16v MPFI 4cyl 4dr FWD [02/07 - 12/10]
RT2 1.8L R18A# SOHC 16v MPFI 4cyl 4dr AWD [02/07 - 12/10]
RT3 2.0L R20A# SOHC 16v MPFI 4cyl 4dr FWD [02/07 - 12/10]
RT4 2.0L R20A# SOHC 16v MPFI 4cyl 4dr AWD [02/07 - 12/08]

HONDA STREAM
RN3 2.0L K20A# DOHC 16v MPFI 4cyl Auto 4dr FWD [10/00 - 06/06]
RN4 2.0L K20A# DOHC 16v MPFI 4cyl Auto 4dr AWD [10/00 - 06/06]
RN6 1.8L R18A# SOHC 16v MPFI 4cyl Auto 4dr FWD [07/06 - 12/14]
RN7 1.8L R18A# SOHC 16v MPFI 4cyl Auto 4dr AWD [07/06 - 12/14]
RN8 2.0L R20A# SOHC 16v MPFI 4cyl CVT 4dr FWD [07/06 - 12/14]

K&N 33-2342 fits the following (USA Website info):
2014 HONDA CIVIC, VTi, VTi-L, R18A, 1.8L
2014 HONDA STREAM, 1.8L, 2.0L, R18A, R20A
2013 HONDA STREAM, 1.8L, 2.0L, R18A, R20A
2013 HONDA CIVIC, VTi, VTi-L, R18A, 1.8L
2012 HONDA STREAM, 1.8L, 2.0L, R18A, R20A
2012 HONDA CIVIC, VTi, VTi-L, R18A, 1.8L
2011 HONDA STREAM, 1.8L, 2.0L, R18A, R20A
2011 HONDA CIVIC VII 1.8L L4 F/I - All  
2011 HONDA CIVIC GX 1.8L L4 F/I - All  
2011 HONDA CIVIC 1.8L L4 F/I - All
2010 HONDA STREAM, 1.8L, 2.0L, R18A, R20A
2010 HONDA CIVIC VII 1.8L L4 F/I - All  
2010 HONDA CIVIC GX 1.8L L4 F/I - All  
2010 HONDA CIVIC 1.8L L4 F/I - All
2010 HONDA CROSS ROAD, 1.8L, 2.0L, (Up to August 2010)
2009 HONDA STREAM, 1.8L, 2.0L, R18A, R20A
2009 HONDA CIVIC VII 1.8L L4 F/I - All  
2009 HONDA CIVIC 1.8L L4 F/I - All
2009 HONDA CROSS ROAD, 1.8L, 2.0L, R18A/R20A
2008 HONDA STREAM, 1.8L, 2.0L, R18A, R20A
2008 HONDA CIVIC VII 1.8L L4 F/I - All  
2008 HONDA CIVIC 1.8L L4 F/I - All  
2008 HONDA CROSS ROAD, 1.8L, 2.0L, R18A/R20A
2007 HONDA STREAM, 1.8L, 2.0L, R18A, R20A
2007 HONDA CIVIC VII 1.8L L4 F/I - All  
2007 HONDA CIVIC 1.8L L4 F/I - All
2007 HONDA CROSS ROAD, 1.8L, 2.0L, R18A/R20A
2006 HONDA STREAM, 2.0L, R20A, DBA-RN8 CHASSIS (After may 2006)
2006 HONDA STREAM, 1.8L, 2.0L, R18A, R20A, (After June 2006)
2006 HONDA CIVIC VII 1.8L L4 F/I - All  
2006 HONDA CIVIC 1.8L L4 F/I - All  
2005 HONDA CIVIC VII 1.8L L4 F/I - All