{"product_id":"m113k-long-tube-headers","title":"M113k Long Tube Headers","description":"The E55\/CLS55 AMG Long Tube Headers are precision-engineered for the M113k platform, offering a significant upgrade over factory-cast log manifolds. The primary tube diameter is 1.9″ OD, with a 2.90″ ID collector diameter and 16 gauge runner wall thickness. Four O2 bungs are included for sensor integration.\n\nThese long tube headers are designed to directly replace your OEM part numbers (Left: A 113 140 09 09 \/ A 113 140 05 09 \/ A 113 140 24 09; Right: A 113 140 08 09 \/ A 113 140 06 09 \/ A 113 140 25 09) with a direct bolt-on setup, requiring no modification. They are dyno-proven to increase low-end torque and horsepower, offering improved throttle response and a more aggressive exhaust note.\n\nInstallation requires weld-in cats, with options for 200-cell or 400-cell catalytic converters, or the use of your own. O2 sensor extension harnesses can be added for convenience. The product is available for pre-order with an estimated arrival of July 2025.","brand":"E55\/","offers":[{"title":"Default Title","offer_id":52687900180792,"sku":"55KLTH","price":700.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/662656727.jpg?v=1784887175","url":"https:\/\/store.motormia.co\/products\/m113k-long-tube-headers","provider":"MOTORMIA","version":"1.0","type":"link"}