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Choose your trim in My Garage to confirm exact fit.
Exact-fit parts for the 2018 Honda Civic Si.
CSF
Part # 3781
$123.08
Vemo
Part # V26-72-0009
$20.22
Standard Motor Products
Part # TX215
$36.20
Beck Arnley
Part # 131-2532
$59.28
Spectra Premium
Part # 7-30007
$100.19
Collision
Part # HO3115174
$221.54
Motorad
Part # 1068-172
$65.86
Spectra Premium
Part # 7-30008
$105.24
Fel-Pro
Part # 36158
$6.89
ContiTech
Part # 62908
$22.86
Skyward Automotive
Part # SK902788
$19.89
US Motor Works
Part # US8145
$56.44
Beck Arnley
Part # 131-2534
$77.10
Collision
Part # HO1225183C
$162.12
GPD
Part # 2812069
$301.34
Beck Arnley
Part # 143-0928
$40.95
Standard Motor Products
Part # RY-737
$10.69
Spectra Premium
Part # CU13582
$159.97
Dorman
Part # 902-788
$40.90
Vernet
Part # TH6267.78
$10.42
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 cooling system 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 Four Seasons, Collision, Standard Motor Products, Beck Arnley, and Gates, 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.
