THY-481Y-LS-C 5.6L Tri-Y Long Tube Headers

The Doug Thorley THY-481Y-LS-C headers are crafted from T304 stainless steel with a silver ceramic coating for durability and performance. Featuring a 4:2:1 Tri-Y long tube design, these headers are engineered to maximize power output across the widest RPM band possible, making them an optimal upgrade for street applications. The primary tube diameter is 1-5/8" with 14-gauge tubing and a 3/8" thick flange, connecting to the factory flange. It is important to note that this product is NOT LEGAL FOR STREET USE ON POLLUTION CONTROLLED VEHICLES and does not include reducers, a Y-pipe, or catalytic converters. The primary tubes have a diameter of 1-5/8" and the collector diameter is 2-1/4". The headers are specifically designed for the 2010-2018 Nissan Patrol and 2010-2016 Infiniti QX56 models equipped with the 5.6L V8 engine, which is rated at 400hp. The manufacturer offers a Limited Lifetime Warranty to the original purchaser. While these headers provide significant power increases, the "Tuned: No" specification suggests that ECU remapping may be beneficial for optimal performance.