{"product_id":"dinan-valved-axleback-exhaust-polished-tips-bmw-g42-m240i","title":"Dinan Valved Axleback Exhaust - BMW G42 M240i - Polished Tips","description":"\u003cp\u003eDinan's Valved Axleback Exhaust for the BMW G42 M240i replaces the factory system with a dual-valve, quad-tip design constructed from TIG-welded, brushed T304 stainless steel. Larger 76mm tubing versus the stock 70mm feeds four 4-inch double-walled polished and laser-engraved tips, with a second valve added to the passenger side for symmetric flow distribution. Dyno-confirmed output: +6 HP and +5 lb-ft at 6,600 RPM, and the system weighs 4 lbs less than stock.\u003c\/p\u003e\u003cp\u003eThe OEM G42 M240i exhaust uses a single valve that routes all gases through the muffler and out one tip when closed, compromising flow balance and tip symmetry. Dinan engineers retained the factory valve actuator and added a matching second unit, so both outer tips open fully under high-load conditions for a deep, even tone across all four tips. When valves are closed, gases route through the muffler and exit the two inner tips for a civilized cabin with no low-speed drone.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eProduct Specifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBrand: Dinan\u003c\/li\u003e\n\u003cli\u003eFitment: BMW G42 M240i (2023-2026), G42 M240i xDrive (2022-2026)\u003c\/li\u003e\n\u003cli\u003eEngine: B58 3.0L Turbocharged I6\u003c\/li\u003e\n\u003cli\u003ePower Gain: +6 HP, +5 lb-ft at 6,600 RPM\u003c\/li\u003e\n\u003cli\u003eWeight Savings: 4 lbs vs. stock\u003c\/li\u003e\n\u003cli\u003eConstruction: TIG-welded T304 stainless steel, brushed\u003c\/li\u003e\n\u003cli\u003eTips: Quad 4-inch double-walled polished, laser engraved\u003c\/li\u003e\n\u003cli\u003ePiping: 76mm (stock: 70mm)\u003c\/li\u003e\n\u003cli\u003eValves: Dual computer-controlled, 76mm diameter\u003c\/li\u003e\n\u003cli\u003ePart Number: D660-0098\u003c\/li\u003e\n\u003cli\u003eCondition: New\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Dinan","offers":[{"title":"Default Title","offer_id":51622185795830,"sku":"DNND660-0098","price":2399.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2674\/6278\/files\/f47f9da6e754d250206e1ce7964e774cL.jpg?v=1789262846","url":"https:\/\/autotecknic.com\/products\/dinan-valved-axleback-exhaust-polished-tips-bmw-g42-m240i","provider":"AutoTecknic USA","version":"1.0","type":"link"}