{"product_id":"spdz1-2017-2025-6-6l-chevy-l5p-duramax-diesel-3-5-downpipe-exhaust","title":"SPDZ1 2017-2025 6.6L Chevy L5P Duramax Diesel 3.5\" Downpipe Exhaust","description":"\u003cp data-start=\"222\" data-end=\"294\"\u003e\u003cstrong data-start=\"222\" data-end=\"292\"\u003eSPDZ1 3.5\" Downpipe Exhaust – 2017–2025 Chevy\/GMC 6.6L L5P Duramax\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"296\" data-end=\"699\"\u003eUnleash the true power of your L5P Duramax with the \u003cstrong data-start=\"348\" data-end=\"379\"\u003eSPDZ1 3.5\" Downpipe Exhaust\u003c\/strong\u003e, engineered for maximum flow, durability, and performance. Designed specifically for the \u003cstrong data-start=\"469\" data-end=\"538\"\u003e2017–2025 Chevy Silverado \u0026amp; GMC Sierra 2500HD\/3500HD 6.6L Duramax\u003c\/strong\u003e (non–Cab \u0026amp; Chassis), this upgrade replaces the restrictive factory downpipe with a \u003cstrong data-start=\"622\" data-end=\"666\"\u003efree-flowing 3.5” stainless steel system\u003c\/strong\u003e built to handle serious power.\u003c\/p\u003e\n\u003cp data-start=\"701\" data-end=\"1142\"\u003eBy eliminating the factory DOC and improving exhaust velocity by up to \u003cstrong data-start=\"772\" data-end=\"800\"\u003e20% more flow than stock\u003c\/strong\u003e, the SPDZ1 downpipe helps your turbo breathe easier—delivering \u003cstrong data-start=\"864\" data-end=\"925\"\u003emore horsepower, torque, quicker spool-up, and lower EGTs\u003c\/strong\u003e. Built with \u003cstrong data-start=\"938\" data-end=\"970\"\u003ehigh-quality stainless steel\u003c\/strong\u003e, a \u003cstrong data-start=\"974\" data-end=\"1016\"\u003e4-bolt flange with pre-installed studs\u003c\/strong\u003e, and a \u003cstrong data-start=\"1024\" data-end=\"1050\"\u003eprecision sealing ring\u003c\/strong\u003e, this downpipe ensures leak-free reliability even under heavy towing or track conditions.\u003c\/p\u003e\n\u003ch3 data-start=\"1144\" data-end=\"1163\"\u003eKey Features:\u003c\/h3\u003e\n\u003cp data-start=\"1164\" data-end=\"1811\"\u003e✅ \u003cstrong data-start=\"1166\" data-end=\"1178\"\u003eFitment:\u003c\/strong\u003e 2017–2025 Chevrolet Silverado \u0026amp; GMC Sierra 2500HD \/ 3500HD (6.6L L5P Duramax, excludes Cab \u0026amp; Chassis models)\u003cbr data-start=\"1287\" data-end=\"1290\"\u003e✅ \u003cstrong data-start=\"1292\" data-end=\"1308\"\u003ePerformance:\u003c\/strong\u003e 20% better exhaust flow than factory downpipe for more power \u0026amp; efficiency\u003cbr data-start=\"1382\" data-end=\"1385\"\u003e✅ \u003cstrong data-start=\"1387\" data-end=\"1400\"\u003eMaterial:\u003c\/strong\u003e Premium stainless steel, corrosion-resistant and built to last\u003cbr data-start=\"1463\" data-end=\"1466\"\u003e✅ \u003cstrong data-start=\"1468\" data-end=\"1479\"\u003eDesign:\u003c\/strong\u003e 3.5” mandrel-bent tubing with 4-bolt flange \u0026amp; two pre-installed studs\u003cbr data-start=\"1549\" data-end=\"1552\" data-is-only-node=\"\"\u003e✅ \u003cstrong data-start=\"1554\" data-end=\"1570\"\u003eReliability:\u003c\/strong\u003e Includes high-quality sealing ring to prevent leaks\u003cbr data-start=\"1622\" data-end=\"1625\"\u003e✅ \u003cstrong data-start=\"1627\" data-end=\"1643\"\u003ePower Gains:\u003c\/strong\u003e Faster turbo spool, reduced EGTs, and improved towing performance\u003cbr data-start=\"1709\" data-end=\"1712\"\u003e✅ \u003cstrong data-start=\"1714\" data-end=\"1731\"\u003eInstallation:\u003c\/strong\u003e Direct bolt-on design, quality tested for durability and trouble-free fitment\u003c\/p\u003e\n\u003cp data-start=\"1813\" data-end=\"2034\"\u003eBuilt to the \u003cstrong data-start=\"1826\" data-end=\"1851\"\u003eSPDZ1 Racing Standard\u003c\/strong\u003e, this downpipe is the perfect balance of \u003cstrong data-start=\"1893\" data-end=\"1926\"\u003epower, sound, and reliability\u003c\/strong\u003e—giving your Duramax the aggressive edge it deserves whether on the street, track, or hauling heavy loads.\u003c\/p\u003e\n\u003cp data-start=\"1813\" data-end=\"2034\"\u003e \u003c\/p\u003e","brand":"Speedzone Performance LLC","offers":[{"title":"Default Title","offer_id":51224679383335,"sku":"SZY-042-CATLESS","price":199.0,"currency_code":"USD","in_stock":true}],"url":"https:\/\/primestore.us\/es\/products\/spdz1-2017-2025-6-6l-chevy-l5p-duramax-diesel-3-5-downpipe-exhaust","provider":"PrimeStore Premium Marketplace ","version":"1.0","type":"link"}