{"product_id":"active-autowerke-header-set-e46-m3-11-008","title":"Active Autowerke Header Set - E46 M3 (11-008)","description":"\u003cp\u003eThe Active Autowerke BMW E46 M3 Header is designed to increase exhaust flow without losing power which can sometimes be a tricky proposition.\u003cbr data-mce-fragment=\"1\"\u003eThese headers are developed to create optimum flow and eliminate restriction that rob much desired horsepower. Following the famed BMW E46 M3 CSL headers, each individual header runner of the Active Autowerke header is cut to a matched equal length to ensure a consistent exhaust scavenging (tolerance in lengths vary by bends to a mean average of 10-20mm).\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eThey are suitable for naturally aspirated and supercharged forced induction applications, Active Autowerke’s BMW E46 M3 Headers are made out of 100% 304 stainless steel, making durability a worry of the past.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eTake it from Robert Chang, BMWCC 2013 National Champion for C-MOD in his E46 M3 powered by the Active Autowerke headers. \"...These headers help to deliver the power when needed...\" You too can help unleash the hidden power in your E46 M3.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eAre they difficult to install? Absolutely not! Robust exhaust flanges with recessed mounting holes make it easy to install. If you can turn a ratchet, you’ll be on your way to increasing horsepower.\u003c\/p\u003e \u003cul\u003e \u003cli\u003eBMW exhaust header mounting hardware for BMW E46 M3Plus, all the gasket hardware that you will need is all included.\u003c\/li\u003e \u003cli\u003eExhaust manifold gasket from the header to the cylinder head. Includes (6 BMW factory gaskets).\u003c\/li\u003e \u003cli\u003eExhaust manifold nuts from the header to the cylinder head. Includes (16 BMW factory copper locking nuts).\u003c\/li\u003e \u003cli\u003eEGR gasket. Include (1 BMW factory gasket).\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eExhaust gasket from the header to the SECTION 1 exhaust. Includes (2 BMW factory gaskets).BMW exhaust header test fitted on BMW S54 jig for fitment and accuracy Quality Control. Each and every BMW E46 M3 header is test fitted to an actual BMW E46 M3 motor stand. There are fixtures to simulate engine bay features like inner fender and frame rail. Oxygen sensor placements are also checked for correct interference. The factory exhaust catalysts are removed in the process, making this solution recommended for off-road applications. Add on our BMW M3 Software Tune for even more power! \u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eBMW E46 M3 SECTION 1 pipe for making power, NO RASP and clean smell Optional ADD-ON. Install and Active Autowerke BMW performance header or another BMW aftermarket brand connecting into your existing BMW factory exhaust system, there will be smell of un-burnt fuel, plus the added RASP like sound inherent in all BMW S54 motors. Click here to LEARN MORE on how to solve this issue with the SECTION 1.\u003cbr data-mce-fragment=\"1\"\u003eInput from Karl Hugh, Head of Engineering, Active Autowerke. \"...the SECTION 1 with 100 cell race style cats do not lose any power!!!! Even when we try them on the BMW E46 M3 powered with the 600 horsepower Supercharger, there is no loss in power!!!...\"\u003c\/p\u003e \u003cul\u003e \u003cli\u003eCreates optimum flow and eliminates restriction\u003c\/li\u003e \u003cli\u003eMatched equal length runners delivers a consistent flow\u003c\/li\u003e \u003cli\u003eDyno Tested to provide improved HP and torque gains\u003c\/li\u003e \u003cli\u003eMade from 100% 304 stainless steel construction\u003c\/li\u003e \u003cli\u003eAvailable in a Polished or BRUSHED finish selection\u003c\/li\u003e \u003cli\u003eDesigned for Street and\/or Track Use\u003c\/li\u003e \u003cli\u003eBolt On Design with Precise Fitment\u003c\/li\u003e \u003cli\u003eBMW OEM Style fitment\u003c\/li\u003e \u003cli\u003eComplete hardware, includes all necessary gaskets and nuts\u003c\/li\u003e \u003cli\u003eTwo year warranty\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eThe four oxygen sensors are temporarily removed to install the exhaust headers. Sometimes the exact placement of these sensors are not correct, resulting in a **CHECK ENGINE ** light. Active Autowerke has created a simple, efficient schematic diagram showing the exact placement with proper connections needed for a seamless re-install.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\u003cli\u003ePart Type:Headers\u003c\/li\u003e\u003cli\u003eFitment Spec:Vehicle Specific\u003c\/li\u003e","brand":"Active AutoWerke","offers":[{"title":"Default Title","offer_id":52025726337316,"sku":"11-008","price":721.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0671\/6801\/0532\/files\/ShowProductImage_ba159018-5526-4701-9a59-ef789b8d823f.jpg?v=1771508957","url":"https:\/\/autohousesupply.com\/products\/active-autowerke-header-set-e46-m3-11-008","provider":"AutoHouseSupply","version":"1.0","type":"link"}