{"product_id":"spdz1-1-7-8-long-tube-headers-1999-2006-chevy-silverado-gmc-sierra-4-8l-5-3l-6-0l","title":"SPDZ1 1-7\/8\" Long Tube Headers | 1999-2006 Chevy Silverado GMC Sierra 4.8L 5.3L 6.0L","description":"\u003ch2\u003eSPDZ1 1-7\/8\" Long Tube Headers for 1999-2006 GM LS Trucks \u0026amp; SUVs\u003c\/h2\u003e\u003cp\u003eUpgrade the exhaust flow, sound, and performance of your GM LS-powered truck or SUV with the SPDZ1 1-7\/8\" Long Tube Header Kit. Designed for 1999-2006 Chevrolet Silverado, GMC Sierra, Tahoe, Yukon, Escalade, Avalanche, and EXT applications, this system features large 1-7\/8\" primary tubes, 3\" collectors, precision-cut flanges, oxygen-sensor bungs, and included exhaust gaskets.\u003c\/p\u003e\u003cp\u003eThe long-tube layout is designed to reduce exhaust restriction and support naturally aspirated, cammed, tuned, and higher-output 4.8L, 5.3L, and 6.0L LS-based engine combinations. The raw natural-metal finish gives the system a purpose-built performance appearance while allowing normal heat coloring after installation.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFull 1-7\/8\" primary tubes\u003c\/li\u003e\n\u003cli\u003eLong-tube header design for improved exhaust flow\u003c\/li\u003e\n\u003cli\u003eLarge 3\" collectors\u003c\/li\u003e\n\u003cli\u003ePrecision-cut, thick header flanges\u003c\/li\u003e\n\u003cli\u003eMandrel-bent tubing for smoother airflow\u003c\/li\u003e\n\u003cli\u003eWelded oxygen-sensor bungs\u003c\/li\u003e\n\u003cli\u003eNatural raw-metal finish\u003c\/li\u003e\n\u003cli\u003eDesigned for GM Gen III LS-based V8 truck engines\u003c\/li\u003e\n\u003cli\u003eIncludes left and right long-tube headers\u003c\/li\u003e\n\u003cli\u003eIncludes exhaust manifold gaskets as pictured\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eVehicle Fitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e1999-2006 Chevrolet Silverado V8\u003c\/li\u003e\n\u003cli\u003e1999-2006 GMC Sierra V8\u003c\/li\u003e\n\u003cli\u003e1999-2006 Chevrolet Tahoe V8\u003c\/li\u003e\n\u003cli\u003e1999-2006 GMC Yukon V8\u003c\/li\u003e\n\u003cli\u003e2002-2006 Chevrolet Avalanche V8\u003c\/li\u003e\n\u003cli\u003e2002-2006 Cadillac Escalade V8\u003c\/li\u003e\n\u003cli\u003e2002-2006 Cadillac Escalade EXT V8\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eEngine Compatibility:\u003c\/strong\u003e 4.8L, 5.3L, and 6.0L LS-based V8 engines. Fitment may vary by chassis, transmission, drivetrain, suspension configuration, and previous exhaust modifications.\u003c\/p\u003e\u003ch3\u003eImportant Installation Notes\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eProfessional installation is strongly recommended.\u003c\/li\u003e\n\u003cli\u003eExhaust fabrication, connection pipes, tuning, oxygen-sensor extensions, spark-plug wire protection, or additional hardware may be required depending on the vehicle.\u003c\/li\u003e\n\u003cli\u003eSome 4L80E-equipped vehicles may require minor clearance work around the transmission bellhousing area.\u003c\/li\u003e\n\u003cli\u003eEarlier 2500-series chassis configurations may have additional suspension or frame-clearance considerations.\u003c\/li\u003e\n\u003cli\u003eVerify vehicle, engine, transmission, drivetrain, and exhaust configuration before ordering.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompetition Use Notice:\u003c\/strong\u003e This product is intended solely for closed-course competition vehicles that are not registered or operated on public roads. The purchaser is responsible for confirming all federal, state, and local emissions requirements before installation.\u003c\/p\u003e","brand":"Speedzone Performance LLC","offers":[{"title":"Default Title","offer_id":54344685683001,"sku":"SZY-004-1\/7”","price":299.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0975\/2130\/3865\/files\/spdz1-silverado-sierra-long-tube-headers-original-1.jpg?v=1787097850","url":"https:\/\/speedzone850.com\/products\/spdz1-1-7-8-long-tube-headers-1999-2006-chevy-silverado-gmc-sierra-4-8l-5-3l-6-0l","provider":"SpeedzoneFL","version":"1.0","type":"link"}