AFE Twisted Stainless Steel Y-Pipe; Street Series (09-18 5.3L Sierra 1500)Find parts that fit my vehicle

Leveled-Up Performance. AFE Twisted Stainless Steel Street Series Y-Pipe is engineered to give you the extra edge for aggressive off-road driving. Its unique true 2 into 1 merge collector design gets rid of turbulence-causing dead zones. Additionally, integrated high-flow cats as well as 3 in. to 3-1/2 in. transitioning piping both work together to produce faster exhaust flow which helps to increase power. For even greater performance numbers, pair the AFE Twisted Stainless Steel Street Series Y-Pipe with the Twisted Steel Headers.

Deep, Aggressive Roar. The AFE Twisted Stainless Steel Street Series Y-Pipe’s design produces an exhaust note that’s deeper and more aggressive. With the AFE Twisted Stainless Steel Street Series Y-Pipe, you now have a Sierra that both looks and sounds powerful.

Free-Flowing Catalytic Converters. The AFE Twisted Stainless Steel Street Series Y-Pipe features a built-in 400-cell catalytic converter that’s less restrictive compared to stock. This allows for a more free-flowing exhaust, that helps increase power. While the Street Series Y-Pipe’s cats do a good job of limiting exhaust pollutants, it is not C.A.R.B.-certified making it illegal for use in California and other states that have adopted C.A.R.B. standards.

Heavy-Duty Construction. The AFE Twisted Stainless Steel Street Series Y-Pipe is manufactured from heavy-duty 409-grade stainless steel for extreme durability. The piping is completely mandrel-bent to support the free flowing of exhaust gasses and the reduction of performance-draining backpressure.

Application. The AFE Twisted Stainless Steel Street Series Y-Pipe fits all 2009 to 2018 GMC Sierra 1500 5.3L models.

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