**DISCONTINUED / No Longer offered**
Don't miss out on this amazing header! Here are the top reasons to consider it:
• Optimized Performance: Specifically designed for the K20Z3 engine in 06 - 11 Civic SI models, it boosts power output across the power band.
• High - Quality Design: Features a 4 - 2 - 1 Tri - Y design with CNC cut 3/8' thick flanges and 2.5' outlet for smooth exhaust flow.
• Cost - Effective: Made with 409 series steel, offering cost savings without sacrificing performance or fitment.
Applications: Direct bolt - on for all 06 - 11 Civic SI models, fitting both 2 - door coupe and 4 - door chassis.
Note: It's highly recommended to upgrade your rear engine mount to a Hasport rear mount to limit movement.
Donut gasket can be replaced by OEM Honda part (18229 - PCX - 003), you'll have to reuse the metal ring.
The K - Tuned 8th Gen Civic SI Header was developed using a proven 4 - 2 - 1 Tri - Y design. It uses large diameter and stepped piping to speed up exhaust flow and minimize restriction. Fitment past the subframe and sway bar is perfect with extra clearance for engine movement.
It starts with 44mm primaries, steps into 50mm secondaries, and finishes with a 64mm or 2.5" exit. Assembled using mandrel bent, 409 series steel tubing and fully tig welded. The CNC cut 3/8' thick flanges are double welded and ported for optimum flow.
This header directly replaces the OEM 2 piece design and eliminates the catalytic converter, so a short 2.5' test - pipe with defouler for the secondary O2 sensor is included.
Why choose 409 steel? K - Tuned 409 Series Headers offer cost savings with no sacrifice to performance and fitment. The raw steel finish can be coated or painted to resist rust.
The exhaust parts market has a lot of issues like knock - offs and misinformation. K - Tuned maintains high quality with its 409 Series Headers.
Use this K - Tuned header on your 2006 - 2011 Civic SI to enhance its performance. It's perfect for car enthusiasts who want to get more power from their street cars without breaking the bank. The header has a 4 - 2 - 1 Tri - Y design with a 2.5' outlet. It starts with 44mm primaries, steps up to 50mm secondaries, and ends with a 64mm exit. It directly replaces the OEM two - piece design and comes with a short 2.5' test - pipe and defouler for the secondary O2 sensor.
