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Complete Systems (LLY)

You'll find tons of the complete exhaust systems for you Duramax LLY truck in this category.  If you're looking to help your Duramax LLY breath a lot easier and keep those EGTs down, this is what you're needing.  We have 5" and 4" exhaust, both are awesome.  The 5" is louder and a deeper sound, while the 4" is slightly more quiet and a smoother tone.  The 4" will support up to 500HP, anything after that, or if you want your truck to have the loudest diesel sound possible, 5" is the way to go for your Duramax LLY.

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