5" Downpipe Back Dual DPF Delete Race Pipe

The Spelab 5" Downpipe Back Dual is a high-performance DPF delete race pipe engineered for 2017-2021 L5P 6.6L Duramax Diesel GMC Sierra 2500 HD, Sierra 3500 HD, Chevrolet Silverado 2500 HD, and Silverado 3500 HD models. This race pipe is constructed from durable 2mm thick T-409 stainless steel, featuring a 5.0-inch inlet diameter and a dual-exit design. The precision mandrel-bent construction ensures maximum flow efficiency, which helps reduce exhaust backpressure. This leads to faster turbo spool, lower Exhaust Gas Temperatures (EGTs), and improved throttle response. Installation is estimated to take about 1 hour with basic hand tools, or can be quicker with an automotive lift. Clamps, hangers, and hardware are included, though some factory hardware may need to be reused. Cutting may be required for shorter wheelbase configurations. A DPF delete capable tuner is required to prevent check engine lights or diagnostic trouble codes, as emission-related sensors are removed. Important fitment notes: This kit is only compatible with models equipped with the OEM style 4-bolt flange off the turbo direct pipe. The Spelab 6.6L Duramax L5P DP-Back must be used in conjunction with their downpipe, as the factory downpipe has an integrated SCR assembly. This product is intended for use on non-registered race vehicles on closed-course competition events only and may violate federal and/or state emissions laws if installed on street or off-road vehicles.