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K&N Filters part # number 69-8704TP fits the 2013 and 2014 Lexus GS 350 with a 3.5L V6 engine. On the dyno, 69-8704TP produced an estimated additional 12.57 horsepower at 5,498 rpm and 13.62 pound-feet of torque at 4,376 rpm over the stock system. Retaining the stock air box allowed K&N engineers to increase the performance while keeping inlet air temperatures, and air / fuel ratios within factory specifications. Utilizing the stock air box maintains the use of the factory cold air inlet near the front wheel, allowed K&N engineers to retain all factory air intake connections, as well as leaving all the stock emissions control equipment in place. Testing revealed that the factory maze of air intake ducting was a significant source of restriction in the stock air inlet system. Included in performance air intake system 69-8704TP is a free-flowing mandrel-bent aluminum intake tube which helps to overcome the restriction found in the stock air ducting, allowing the Lexus GS 350 3.5-liter engine to breathe easier. Restriction isn’t the only trouble with the stock air intake as it also creates turbulence in the incoming air. The mandrel-bent aluminum intake tube used in 69-8704TP has a smooth and consistent internal circumference for reduced airflow turbulence. To complement the under hood appearance of the 2013 and 2014 Lexus GS 350 the intake tube is protected with a durable chrome-like finish that will look great for years to come without the need for polishing.
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