{"product_id":"fmf-factory-4-1-muffler-042396-with-resonance-chamber-technology-for-enhanced-exhaust-performance","title":"FMF Factory 4.1 Muffler 042396 with Resonance Chamber Technology for Enhanced Exhaust Performance","description":"\u003cp\u003e\u003c\/p\u003e\u003cp\u003eThe FMF Factory 4.1 Muffler (Part Number: 042396) is engineered for high-performance off-road and motocross applications, delivering both power and sound management. Featuring FMF's patented Resonance Chamber Technology (RCT), this muffler incorporates a unique core shape that significantly reduces noise levels while preserving maximum power output. Internal ducts within the chambers increase internal volume, optimizing exhaust flow for noticeable power gains across the entire RPM range. Constructed in the U.S.A., the FMF Factory 4.1 is built with durability and performance in mind. Its design centralizes mass with FMF's Factory Forward Engineering, making it less susceptible to crash damage, which is essential for aggressive riding environments. The muffler's innovative rear end cap allows for quick installation of tuning tip inserts or a spark arrestor by simply removing four screws, streamlining customization and maintenance. The included QuietCore 94dB insert ensures compliance with AMA and FIM sound regulations, making this muffler suitable for competitive and recreational use. Additionally, a spark arrestor is integrated into the muffler, providing environmental safety and compliance with trail riding standards. Weighing approximately 237 pounds, the FMF Factory 4.1 offers a balanced combination of lightweight construction and rugged durability, making it an ideal upgrade for riders seeking enhanced performance and reliable noise suppression.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eResonance Chamber Technology (RCT): patented core shape reduces noise while maintaining maximum power output\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eInternal Duct Design: increases internal volume for improved exhaust flow and power gains throughout the RPM range\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eFactory Forward Engineering: centralizes mass for enhanced durability and crash resistance\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eRemovable End Cap: allows easy installation of tuning tip inserts or spark arrestor with four screws\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eSound Compliance: includes QuietCore 94dB insert to meet AMA and FIM sound requirements\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eEnvironmental Safety: integrated spark arrestor for trail and off-road use\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eMade in the U.S.A.: quality craftsmanship and reliable performance\u003c\/li\u003e\u003c\/ul\u003e","brand":"FMF","offers":[{"title":"Default Title","offer_id":45974571974853,"sku":"18212036","price":674.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0253\/7891\/4355\/files\/2105451.png?v=1773889339","url":"https:\/\/btqllc.com\/products\/fmf-factory-4-1-muffler-042396-with-resonance-chamber-technology-for-enhanced-exhaust-performance","provider":"Bikes Trikes and Quads LLC","version":"1.0","type":"link"}