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Choose your trim in My Garage to confirm exact fit.
Exact-fit parts for the 2004 Honda Civic Si.
Walker Products
Part # 350-64011
$255.55
Walker Products
Part # 250-24121
$55.74
AP Exhaust
Part # 770134
$559.44
Delphi
Part # ES10937
$212.54
Walker Products
Part # 250-24446
$61.34
Bosch
Part # 15406
$81.11
Spectra Premium
Part # OS6085
$54.45
Denso
Part # 234-4224
$66.94
Spectra Premium
Part # OS5449
$20.27
Walker Products
Part # 250-54013
$212.32
Denso
Part # 234-4122
$45.66
Vibrant
Part # 1460K
$74.50
Denso
Part # 234-4352
$104.18
NGK
Part # 24423
$56.08
Bosch
Part # 13534
$54.23
Delphi
Part # ES20063
$55.23
Eastern Catalytic
Part # 40593
$377.46
Four Seasons
Part # 75736
$60.45
Bosch
Part # 15473
$297.16
Eastern Catalytic
Part # 40582
$502.94
This page groups parts listed for the 2004 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 exhaust systems parts for the 2004 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 Walker Products, Bosch, Spectra Premium, Denso, and Walker Exhaust, 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.
