{"product_id":"8th-gen-civic-si-4-2-1-tri-y-header-with-test-pipe","title":"8th Gen Civic SI 4-2-1 Tri-Y Header with Test Pipe","description":"The K-Tuned 8th Gen Civic SI Header is a performance-enhancing component designed for the K20Z3 engine found in 2006-2011 Honda Civic SI Coupe and Sedan models.\n\nThis header utilizes a 4-2-1 Tri-Y design, aimed at delivering power gains across the entire power band, not just at high RPMs. It is constructed from 409 Series Steel with CNC-cut 3\/8\" thick flanges and a 2.5\" outlet. The design incorporates large diameter piping, stepped tubing, and smooth transitions to minimize exhaust gas restriction and improve flow.\n\nThe header replaces the OEM 2-piece design and eliminates the catalytic converter. It comes with a short 2.5\" test-pipe and a defouler for the secondary O2 sensor.\n\nInstallation notes recommend upgrading the rear engine mount to a Hasport rear mount to limit engine movement. The donut gasket can be replaced with an OEM Honda part (18229-PCX-003), reusing the metal ring.","brand":"K-Tuned","offers":[{"title":"Default Title","offer_id":52686532051256,"sku":"KBH-CSI-K20","price":429.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/687881707.webp?v=1784874652","url":"https:\/\/store.motormia.co\/products\/8th-gen-civic-si-4-2-1-tri-y-header-with-test-pipe","provider":"MOTORMIA","version":"1.0","type":"link"}