The Dorman 674-731 Left Side Exhaust Manifold is a OE-style replacement for your 2001-2016 GM 6.6L Duramax LB7/LLY/LBZ/LMM/LML. This exhaust manifold
was precision-engineered and manufactured to match the fit and function
of the original factory manifold on your Chevy/GMC. The durable cast iron construction helps resist warping, cracking, and leaking for long-lasting reliability.
It includes all necessary gaskets and downpipe hardware for a complete repair.
The DORMAN 674-731 LEFT SIDE EXHAUST MANIFOLD is not tapped for an EGT probe.
Complete the job with these highly suggested add-on products.
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