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Choose your trim in My Garage to confirm exact fit.
Exact-fit parts for the 2018 Honda Civic Si.
GPD
Part # 1211360
$24.80
Denso
Part # 143-3792
$21.41
Baldwin Filters
Part # PA10407
$19.48
Hengst
Part # E3929LI
$19.30
K&N
Part # 33-5044
$76.47
Dorman
Part # 46704
$12.80
Baldwin Filters
Part # PA10057
$13.56
aFe
Part # 30-10267
$79.98
aFe
Part # 35-10006C
$23.55
Pronto
Part # PA99117
$16.95
Pronto
Part # PA99381
$15.57
Radium Engineering
Part # 20-1086
$64.97
aFe
Part # 31-10267
$83.48
Corteco
Part # 80000330
$14.31
Beck Arnley
Part # 042-2153
$28.05
Pronto
Part # PA99116
$19.71
Dorman
Part # 696-535
$26.36
WIX
Part # WA10417
$24.34
Pronto
Part # PC6080X
$27.87
Bosch
Part # 6037C
$35.85
This page groups parts listed for the 2018 Honda Civic Si. Some products fit every trim, while others depend on submodel, engine, drivetrain, or brake package. Use your trim in My Garage or the product page fitment check to confirm exact fit.
We offer a wide selection of air filters parts for the 2018 Honda Civic Si. This page narrows the catalog to the year, make, and model; use your trim on product pages to confirm exact fit when a part only fits certain submodels.
We carry parts from trusted brands including Baldwin Filters, Pronto, aFe, Beck Arnley, and Bosch, plus many more. Filter by brand to find your preferred manufacturer.
Most in-stock items ship within 1-2 business days. Shipping rates are calculated at checkout based on your location.
Warranty coverage varies by manufacturer but typically ranges from 1 year to lifetime. Each product page includes specific warranty information from the manufacturer.
