{"product_id":"ppe-high-flow-exhaust-manifolds-with-up-pipes-black-116111220-2002-2004-6-6l-duramax-lb7","title":"PPE HIGH-FLOW EXHAUST MANIFOLDS WITH UP-PIPES - BLACK 116111220 | 2002-2004 6.6L Duramax LB7","description":"\u003cp\u003eUpgrade the restrictive factory exhaust manifolds and up-pipes on your GM 6.6L Duramax LB7 with the PPE 116111220 High-Flow Exhaust Manifolds \u0026amp; Up-Pipes. Engineered to maximize exhaust flow, reduce backpressure, and improve turbocharger efficiency, this premium system is designed to increase performance while maintaining long-term reliability.\u003c\/p\u003e\n\u003cp\u003eThe high-flow manifolds are constructed from durable high-silicon molybdenum cast iron and paired with heavy-duty stainless steel up-pipes featuring aircraft-grade internally sleeved bellows. The larger internal diameter and free-flowing design help lower exhaust gas temperatures, improve turbo spool-up, and support increased horsepower and fuel efficiency.\u003c\/p\u003e\n\u003cp\u003eFor additional thermal management and corrosion resistance, the manifolds and up-pipes feature a durable black ceramic coating. This advanced coating creates a thermal barrier that helps retain exhaust heat within the system, reduces underhood temperatures, minimizes thermal cycling, and protects against moisture, road salt, fuel, oil, and other corrosive contaminants.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBlack ceramic coated finish\u003c\/li\u003e\n\u003cli\u003eSignificantly reduces exhaust backpressure\u003c\/li\u003e\n\u003cli\u003eHigh-silicon moly cast iron manifold construction\u003c\/li\u003e\n\u003cli\u003eImproves turbo spool-up and exhaust flow\u003c\/li\u003e\n\u003cli\u003eHelps reduce exhaust gas temperatures (EGTs)\u003c\/li\u003e\n\u003cli\u003eSupports increased horsepower and fuel efficiency\u003c\/li\u003e\n\u003cli\u003eAircraft-grade stainless steel internally sleeved bellows\u003c\/li\u003e\n\u003cli\u003eFree-flowing stainless steel inner liner bellows\u003c\/li\u003e\n\u003cli\u003e11-gauge stainless steel up-pipes with .120-inch wall thickness\u003c\/li\u003e\n\u003cli\u003e2-inch outside diameter up-pipes\u003c\/li\u003e\n\u003cli\u003eBuilt-in bosses pre-drilled and tapped for 1\/8\" NPT EGT sensors\u003c\/li\u003e\n\u003cli\u003eEnhanced corrosion and heat resistance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2001–2004 GM 6.6L Duramax LB7\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eImportant Notes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePPE 117000400 3\" Stainless Steel Downpipe is required for installation.\u003c\/li\u003e\n\u003cli\u003eThe factory downpipe is not compatible with this system.\u003c\/li\u003e\n\u003cli\u003eCannot be shipped to California.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Pacific Performance Engineering","offers":[{"title":"Default Title","offer_id":52390555681051,"sku":"116111220","price":1292.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/5757\/3147\/files\/Screenshot2026-06-23at12.21.08PM.png?v=1782239060","url":"https:\/\/wwmperformance.com\/products\/ppe-high-flow-exhaust-manifolds-with-up-pipes-black-116111220-2002-2004-6-6l-duramax-lb7","provider":"WWM Performance","version":"1.0","type":"link"}