{"product_id":"2001-2007-6-6l-gm-duramax-lb7-lly-lbz-5-downpipe-back-dpf-delete-race-pipe","title":"2001-2007 6.6L GM Duramax LB7 LLY LBZ 5\" Downpipe Back Exhaust","description":"\u003c!-- more --\u003e\n\u003ch4\u003eFITMENT\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e2001-2007 6.6L Silverado \u0026amp; Sierra Duramax LB7 \/ LLY \/ LBZ 2500HD \/ 3500HD V8 Turbo Diesel.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFits Standard Cab, Extended Cab, and Crew Cab models with Short Bed or Long Bed.\u003c\/li\u003e\n\u003cli\u003eShorter wheelbases require a simple trim of the straight pipe to fit during installation.\u003c\/li\u003e\n\u003cli\u003eDoes NOT fit Cab \u0026amp; Chassis models.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eDESCRIPTION\u003c\/h4\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003cb\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"MsoNormal\"\u003eThe 01-07 Silverado and Sierra 2500HD\/3500HD platforms equipped with LB7, LLY, and LBZ engines are legendary for their bulletproof reliability.\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eHowever, the restrictive OEM factory exhaust system—clogged with a heavy CAT converter and a massive, restrictive muffler—stifles your engine's true potential.\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eThis restriction causes excessive backpressure, traps extreme heat right behind the turbo, inflates your Exhaust Gas Temperatures and suffocates throttle response, especially when pulling heavy trailers or heading off-road.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cstrong\u003e\u003cspan data-type=\"text\"\u003e\u003cspan data-type=\"leaf\"\u003eKey Features\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePremium T-409 Stainless Steel: Heavy-duty, corrosion-resistant, and built with smooth weld seams to withstand extreme heat.\u003c\/li\u003e\n\u003cli\u003eEliminate Factory Restrictions: Replaces the power-robbing OEM catalytic converter and the massive factory muffler that choke engine's breath.\u003c\/li\u003e\n\u003cli\u003eDrastic EGT \u0026amp; Backpressure Drop: Eliminates the bottleneck right behind the turbo. It rapidly drops EGTs—critical for LB7 trucks pushing high power and LLY owners looking to eliminate heat-soak issues under heavy load.\u003c\/li\u003e\n\u003cli\u003eEngineered for Modified Trucks (80+ HP): This 5\" exhaust provides maximum airflow for upgraded turbos, built transmissions, and larger injectors at wide-open throttle.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eFAQ\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Will this lower my EGTs when I tow heavy loads?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003eA: Yes. The heavy factory exhaust setup creates substantial backpressure that traps heat under load. It drops backpressure to near zero to lower EGTs. This is the most effective mod to manage tow temperatures.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does the 5\" system require custom or aftermarket hangers?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003eA: No. The system features rugged, pre-welded OE-style hangers designed to slip perfectly into your truck’s factory rubber exhaust mounts. The installation process is completely identical to our 4\" system.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Will the 5\" pipe hang lower than my factory exhaust?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003eA: The system is engineered to follow the exact same high-clearance routing paths as your factory setup, so your ground clearance remains virtually identical. If your truck is lifted, clearance is completely fine. If your truck is heavily lowered, the 4\" version sits slightly closer to the frame rail.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How much horsepower will the 5\" add over the 4\" version?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003eA: On stock\/mild trucks: Zero. A 5\" pipe won't out-power a 4\" pipe unless exhaust volume maxes out the 4\" system. It only adds power on built trucks with larger aftermarket turbos (75+ lb\/min) by removing the top-end restriction a 4\" pipe creates.\u003c\/span\u003e\u003c\/p\u003e","brand":"True American Diesel","offers":[{"title":"Default Title","offer_id":47261109256380,"sku":"DP-0305","price":1498.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/4101\/8044\/files\/579A0580_b5fb1dac-2d91-49a8-a5bc-28ef74b9e234.jpg?v=1786464436","url":"https:\/\/trueamericandiesel.com\/products\/2001-2007-6-6l-gm-duramax-lb7-lly-lbz-5-downpipe-back-dpf-delete-race-pipe","provider":"TrueAmericanDiesel","version":"1.0","type":"link"}