{"product_id":"active-autowerke-bmw-e46-m3-exhaust-section-1-with-active-aflow-extra-high-flow-catalysts","title":"Active Autowerke BMW E46 M3 Exhaust SECTION 1 with Active AFlow extra high flow catalysts","description":"\u003c!-- Ship Weight: 14--\u003e\n\u003ch2 aria-level=\"0\" aria-posinset=\"0\" aria-setsize=\"0\"\u003eActive Autowerke BMW E46 M3 Exhaust SECTION 1 with Active AFlow ultra high flow catalysts\u003c\/h2\u003e\n\u003cp aria-level=\"0\" aria-posinset=\"0\" aria-setsize=\"0\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(239, 11, 11);\"\u003eNO PERFORMANCE TUNE NEEDED.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp aria-level=\"0\" aria-posinset=\"0\" aria-setsize=\"0\"\u003eCombine the Active Autowerke Exhaust SECTION 1 with a pair of Active AFlow catalysts and you have part of a winning combination for your BMW E46 M3. \u003cbr\u003e\u003c\/p\u003e\n\u003ch2 aria-level=\"0\" aria-posinset=\"0\" aria-setsize=\"0\"\u003eDesign and Concept:\u003c\/h2\u003e\n\u003cp aria-level=\"0\" aria-posinset=\"0\" aria-setsize=\"0\" style=\"float: left;\"\u003e\u003cimg alt=\"Factory BMW exhaust SECTION 1 fr BMW E46 M3\" height=\"87\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0578\/5357\/files\/Sec-1_small.jpg?1692\" style=\"float: left; margin-right: 10px;\" width=\"123\"\u003eWhy create an exhaust SECTION 1 when the USA version BMW factory SECTION 1 already comes from the factory as a straight through design with two separate pipes and resonators already built in on one side? \u003cbr\u003eIf a performance aftermarket headers was installed, how much better could one gain against the already BMW factory SECTION 1?\u003c\/p\u003e\n\u003ch2 aria-level=\"0\" aria-posinset=\"0\" aria-setsize=\"0\"\u003eSolution:\u003c\/h2\u003e\n\u003cp aria-level=\"0\" aria-posinset=\"0\" aria-setsize=\"0\" style=\"float: left;\"\u003eTh\u003cimg alt=\"BMW Factory Section 1 with RASP like sound\" height=\"96\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0578\/5357\/files\/BMWsec-1_small.jpg?1694\" style=\"float: left; margin-right: 10px;\" width=\"90\"\u003ee Active Autowerke Exhaust SECTION 1 only comes into play if the E46 M3 already has a performance header already installed. One will experience a high smell of unburnt fuel. (due to the open exhaust w\/o any catalysts) and development of a RASPY like sound of which the BMW S54 engine i\u003cspan\u003es notorious for with the BMW Stock Section 1 when equipped. This raspy like sound is a matter of engine sound harmonics at a specific RPM range, a sort of resonance that is very loud and noticeable when the engine is revving at or above 4,000 rpm.\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003eThis is the BMW section 1 - where the RASP like noise emits from.\u003c\/p\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp aria-level=\"0\" aria-posinset=\"0\" aria-setsize=\"0\" style=\"float: left;\"\u003e\u003cimg alt=\"BMW SECTION 1 for Rasp Elimination on BMW E46 M3\" height=\"76\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0578\/5357\/files\/double_pipe_2_small.jpg?1693\" style=\"float: left; margin-right: 10px;\" width=\"114\"\u003eWith the Active Autowerke Exhaust SECTION 1 installed, the BMW performance gains are about the same as running the factory section 1. However, that's impressive considering the exhaust flow is also being filtered while running through a pair of Active AFlow catalysts which are EPA registered. The power and performance is still there. We utilize the same method as the European models and provide a set of cables to allow the post cat O2 sensors to be placed in the section 1 after the Cats - this results in no CEL due to Cat efficiency.\u003cbr\u003e\u003cbr\u003eGone is the smell of unburnt fuel. \u003cstrong\u003eA BIG advantage.\u003c\/strong\u003e\u003cbr\u003eGone is the RASP like sound. \u003cstrong\u003eAnother BIG advantage.\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp aria-level=\"0\" aria-posinset=\"0\" aria-setsize=\"0\" style=\"float: left;\"\u003e \u003c\/p\u003e\n\u003cp aria-level=\"0\" aria-posinset=\"0\" aria-setsize=\"0\" style=\"float: left;\"\u003e \u003c\/p\u003e\n\u003cp aria-level=\"0\" aria-posinset=\"0\" aria-setsize=\"0\" style=\"float: left;\"\u003e \u003c\/p\u003e\n\u003cp aria-level=\"0\" aria-posinset=\"0\" aria-setsize=\"0\" style=\"float: left;\"\u003e \u003c\/p\u003e\n\u003cp aria-level=\"0\" aria-posinset=\"0\" aria-setsize=\"0\" style=\"float: left;\"\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003e\n\u003cstrong aria-level=\"0\" aria-posinset=\"0\" aria-setsize=\"0\"\u003e\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/h2\u003e\n\u003ch2\u003e\n\u003cstrong aria-level=\"0\" aria-posinset=\"0\" aria-setsize=\"0\"\u003e\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/h2\u003e\n\u003ch2\u003e\n\u003cstrong aria-level=\"0\" aria-posinset=\"0\" aria-setsize=\"0\"\u003e\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/h2\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong aria-level=\"0\" aria-posinset=\"0\" aria-setsize=\"0\"\u003eFEATURES:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"line-height: 1.5;\"\u003eDesigned and recommended for Off Road Use\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eUses EPA registered Active AFlow metallic exhaust catalysts for emission control\u003c\/li\u003e\n\u003cli\u003eNo unburnt fuel like smell\u003c\/li\u003e\n\u003cli\u003eNO RASP like sound\u003c\/li\u003e\n\u003cli\u003eNO CEL due to Cat efficiency\u003c\/li\u003e\n\u003cli\u003eIncludes O2 sensor extension cables for post Cat sensors\u003c\/li\u003e\n\u003cli\u003eBrushed Finish for that industrial appeal\u003c\/li\u003e\n\u003cli\u003eConstructed from 100% 304 stainless steel\u003c\/li\u003e\n\u003cli\u003eUtilizes factory mounting points for easy bolt-on install\u003c\/li\u003e\n\u003cli\u003eTwo year warranty with Free Tech support\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0578\/5357\/files\/pdf-icon_small.png?1054\"\u003e \u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv class=\"sb-car-tag-by-description\" style=\"display: none;\"\u003e\u003cbr\u003e\u003c\/div\u003e","brand":"Active Autowerke","offers":[{"title":"Default Title","offer_id":67610945519932,"sku":"11-010A","price":1519.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0714\/3070\/1372\/files\/double_pipe_4.jpg?v=1790884503","url":"https:\/\/trucranemotorsports.com\/products\/active-autowerke-bmw-e46-m3-exhaust-section-1-with-active-aflow-extra-high-flow-catalysts","provider":"TruCrane Motorsports","version":"1.0","type":"link"}