{"product_id":"plm-power-driven-k-series-header-downpipe-with-high-flow-cat-2012-2015-civic-si-fg4-2013-2015-acura-ilx","title":"PLM Power Driven K-Series Header Downpipe with High-Flow Cat – 2012–2015 Civic Si FG4 \u0026 2013–2015 Acura ILX","description":"\u003ch2 data-start=\"221\" data-end=\"335\"\u003e\u003cstrong data-start=\"224\" data-end=\"335\"\u003ePLM Power Driven K-Series Header Downpipe with High-Flow Cat – 2012–2015 Civic Si FG4 \u0026amp; 2013–2015 Acura ILX\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp data-start=\"337\" data-end=\"365\"\u003e\u003cstrong data-start=\"337\" data-end=\"345\"\u003eSKU:\u003c\/strong\u003e PLM-HFG4-HEADER-CAT\u003c\/p\u003e\n\u003ch3 data-start=\"367\" data-end=\"394\"\u003e\u003cstrong data-start=\"371\" data-end=\"394\"\u003eProduct Description\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"395\" data-end=\"844\"\u003eThe PLM Power Driven K-Series Header Downpipe is designed specifically for the 9th Generation Honda Civic Si FG4 and Acura ILX, offering a direct bolt-on performance upgrade with exceptional fitment and flow. Engineered to replace the restrictive factory downpipe, this high-performance unit features a large 4.25-inch bellmouth design paired with a 3-inch outlet to significantly improve exhaust flow, throttle response, and overall power delivery.\u003c\/p\u003e\n\u003cp data-start=\"846\" data-end=\"1383\"\u003eConstructed from high-quality stainless steel, this one-piece downpipe integrates a high-flow 200-cell metallic core catalytic converter that balances performance gains with emissions-conscious design. Precision CNC mandrel-bent tubing, a high-grade cast bellmouth section, and TIG-welded construction ensure durability under high heat and aggressive driving conditions. Designed to bolt directly to the OEM cat-back exhaust location, this downpipe requires no cutting or fabrication, making installation straightforward and hassle-free.\u003c\/p\u003e\n\u003cp data-start=\"1385\" data-end=\"1558\"\u003eWhether you’re upgrading for performance, sound, or reliability, the original PLM Power Driven downpipe delivers proven results and excellent value for K-series enthusiasts.\u003c\/p\u003e\n\u003ch3 data-start=\"1560\" data-end=\"1580\"\u003e\u003cstrong data-start=\"1564\" data-end=\"1580\"\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul data-start=\"1581\" data-end=\"2176\"\u003e\n\u003cli data-start=\"1581\" data-end=\"1641\"\u003e\n\u003cp data-start=\"1583\" data-end=\"1641\"\u003eHigh-flow \u003cstrong data-start=\"1593\" data-end=\"1639\"\u003e200-cell metallic core catalytic converter\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1642\" data-end=\"1714\"\u003e\n\u003cp data-start=\"1644\" data-end=\"1714\"\u003eLarge \u003cstrong data-start=\"1650\" data-end=\"1673\"\u003e4.25-inch bellmouth\u003c\/strong\u003e design for improved exhaust scavenging\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1715\" data-end=\"1763\"\u003e\n\u003cp data-start=\"1717\" data-end=\"1763\"\u003e\u003cstrong data-start=\"1717\" data-end=\"1734\"\u003e3-inch outlet\u003c\/strong\u003e for increased exhaust flow\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1764\" data-end=\"1806\"\u003e\n\u003cp data-start=\"1766\" data-end=\"1806\"\u003eOne-piece stainless steel construction\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1807\" data-end=\"1844\"\u003e\n\u003cp data-start=\"1809\" data-end=\"1844\"\u003ePrecision CNC mandrel-bent tubing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1845\" data-end=\"1882\"\u003e\n\u003cp data-start=\"1847\" data-end=\"1882\"\u003eHigh-grade cast bellmouth section\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1883\" data-end=\"1940\"\u003e\n\u003cp data-start=\"1885\" data-end=\"1940\"\u003eBraided flex pipe with interlock liner for durability\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1941\" data-end=\"1984\"\u003e\n\u003cp data-start=\"1943\" data-end=\"1984\"\u003eCNC-machined \u003cstrong data-start=\"1956\" data-end=\"1982\"\u003e3\/8-inch thick flanges\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1985\" data-end=\"2032\"\u003e\n\u003cp data-start=\"1987\" data-end=\"2032\"\u003eIncludes gaskets and all necessary hardware\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2033\" data-end=\"2063\"\u003e\n\u003cp data-start=\"2035\" data-end=\"2063\"\u003eIncludes O2 sensor adapter\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2064\" data-end=\"2120\"\u003e\n\u003cp data-start=\"2066\" data-end=\"2120\"\u003eOEM O2 sensor bungs plus additional wideband O2 bung\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2121\" data-end=\"2176\"\u003e\n\u003cp data-start=\"2123\" data-end=\"2176\"\u003eDirect bolt-on installation to OEM cat-back exhaust\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"2178\" data-end=\"2201\"\u003e\u003cstrong data-start=\"2182\" data-end=\"2201\"\u003eVehicle Fitment\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul data-start=\"2202\" data-end=\"2285\"\u003e\n\u003cli data-start=\"2202\" data-end=\"2259\"\u003e\n\u003cp data-start=\"2204\" data-end=\"2234\"\u003e\u003cstrong data-start=\"2204\" data-end=\"2232\"\u003e2012–2015 Honda Civic Si\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"2237\" data-end=\"2259\"\u003e\n\u003cli data-start=\"2237\" data-end=\"2259\"\u003e\n\u003cp data-start=\"2239\" data-end=\"2259\"\u003e9th Generation FG4\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2260\" data-end=\"2285\"\u003e\n\u003cp data-start=\"2262\" data-end=\"2285\"\u003e\u003cstrong data-start=\"2262\" data-end=\"2285\"\u003e2013–2015 Acura ILX\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"2287\" data-end=\"2313\"\u003e\u003cstrong data-start=\"2291\" data-end=\"2313\"\u003eInstallation Notes\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul data-start=\"2314\" data-end=\"2554\"\u003e\n\u003cli data-start=\"2314\" data-end=\"2366\"\u003e\n\u003cp data-start=\"2316\" data-end=\"2366\"\u003eDirect bolt-on design, no modifications required\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2367\" data-end=\"2425\"\u003e\n\u003cp data-start=\"2369\" data-end=\"2425\"\u003eDesigned to mate with factory cat-back exhaust systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2426\" data-end=\"2467\"\u003e\n\u003cp data-start=\"2428\" data-end=\"2467\"\u003eProfessional installation recommended\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2468\" data-end=\"2554\"\u003e\n\u003cp data-start=\"2470\" data-end=\"2554\"\u003eEmissions regulations vary by location—verify local compliance before installation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Racing Precision Motorsports","offers":[{"title":"Default Title","offer_id":43959675027516,"sku":"PLM-HFG4-HEADER-CAT","price":409.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/5934\/4956\/files\/IMG_2015.webp?v=1770340929","url":"https:\/\/rpm-racing.com\/products\/plm-power-driven-k-series-header-downpipe-with-high-flow-cat-2012-2015-civic-si-fg4-2013-2015-acura-ilx","provider":"Racing Precision Motorsports","version":"1.0","type":"link"}