K-Tuned
K-Tuned 06-11 Honda Civic Si Header 8th Gen 409 Series Steel
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- SKU:
- KBH-CSI-409
- MPN:
- KBH-CSI-409
- Shipping:
- Calculated at Checkout
Description
A Tri-Y option for the K20Z3.
K-Tuned 409 Header | 2006-2011 Civic Si. The K-Tuned 409-series header brings a 4-2-1 layout and a 2.5-inch outlet to the 8th-gen Civic Si. The exhaust-connection details matter here, so plan the header and cat-back as one combination.
Why it belongs on the build
- 409-series steel construction.
- 4-2-1 Tri-Y design.
- CNC-cut 3/8-inch flanges described below.
Before you order
Review the OEM-sized Full-Race connection note and any customization requirements. Select the intended catalyst configuration and confirm the exhaust flange before ordering.
Plan the rest of the setup
Related parts are sold separately. Confirm fitment and option compatibility for your build.
Want a second set of eyes on the setup? Ask HARDmotion with your year, model, trim and current modifications. Shipping information · Returns and warranties
K-Tuned 06-11 Honda Civic Si Header
409 Steel Series 4-2-1 8th Gen Civic Race Header
The K-Tuned 4-2-1 Race Header for the 06-11 Honda Civic Si 8th Gen Civic. This 409 Steel series header provides good power, good pricing and also offers a high-flow cat.
Features:
- Fits Civic Si with K20Z3 engine.
- 4-2-1 Tri-Y Design - 409 Series Steel
- CNC cut 3/8" thick flanges
- 2.5" Outlet
Fitment:
2006 2007 2008 2009 2010 2011 Honda Civic Si
Sedan or Coupe
This header needs the oem sized piping from full-race for fitment.
Info:
Bolts to stock exhaust or any exhaust that has adaptable flange.
May have to have customization to fit exhaust but most exhaust it will bolt to.
We cannot guarantee it though.
FREE SHIPPING USA 48 STATES
Featured reviews
from reviews3 Reviews
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Good product
Quick response , fast shipping and great product
-
loud
Love the exhaust. Paired with the header and race cat it screams
-
K-tuned Header
I upgraded to the stainless header offered by K-Tuned and Hardmotion was extremely good with communicating status and updates with me (K-Tuned did not, as I reached out to them regarding the header's damage during shipping). The Header itself didn't have the best welds and there were a couple of areas where you know flow will be restricted. If you are weird like me and want a HFC, go with a universal and have it welded into the test pipe elsewhere (K-Tuned will charge an additional $80 to have it welded). The HFC also kept the defouler in place. I have not tuned/Dyno'd yet but I think it feels a little more responsive in mid-high RPMs.
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