{"product_id":"ppe-116112500-high-flow-exhaust-manifolds-with-up-pipes","title":"PPE 116112500 HIGH-FLOW EXHAUST MANIFOLDS WITH UP-PIPES","description":"\u003cp\u003e\nThe PPE 116112500 High-Flow Exhaust Manifolds With Up-Pipes Kit is designed as a premium replacement for your GM 6.6L Duramax L5P, delivering improved airflow, horsepower, and turbo response. The manifolds are cast from high-silicon molybdenum iron, providing exceptional strength and durability, while remaining compatible with factory heat shields. The included aircraft-grade 304 stainless steel up-pipes feature internally sleeved bellows with an increased 2-inch inner diameter for optimized flow and reduced exhaust back-pressure. This design lowers exhaust gas temperatures (EGTs), enhances turbo spool-up, and contributes to improved fuel economy and long-term reliability. Manifold gaskets are coated with a protective molybdenum compound to ensure a secure, leak-free seal. Each up-pipe is constructed from 11-gauge, 0.120” wall stainless steel for strength and longevity.\n\u003c\/p\u003e","brand":"Pacific Performance Engineering","offers":[{"title":"Default Title","offer_id":51638003925275,"sku":"116112500","price":1349.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/5757\/3147\/files\/Screenshot2026-01-19at9.45.21AM.png?v=1768841140","url":"https:\/\/wwmperformance.com\/products\/ppe-116112500-high-flow-exhaust-manifolds-with-up-pipes","provider":"WWM Performance","version":"1.0","type":"link"}