HSP Ceramic Coated Cast Manifolds 2001-2016 Duramax requires-vin 7% less restrictive than stock

7% less restrictive than stock

but please call for a current lead time before ordering

LML Duramax applications

Or "Drop Control Arm" Lifts kits

which boosts exhaust flow and reduces exhaust noise

HSP Ceramic Coated Cast Manifolds 2001-2016 Duramax requires-vin 7% less restrictive than stockHSP Ceramic Coated Cast Manifolds 2001 2016 Duramax Why Would You Need the HSP Diesel Coated Billet Manifolds? The factory manifolds are restrictive from the get go. HSP Diesel noticed quickly that these needed to be addressed if you wanted to make more power. The factory manifolds are also known to fail due to cracks, warping, and broken bolts. The HSP Diesel Manifolds address all of these issues while looking better and adding power. What do the HSP