Chev GMC 6.6L Diesel Mahle Original Intake Manifold Gaskets MS19909Chev GMC 6. 6L Diesel Mahle Original Intake Manifold Gaskets MS19909 Port Style: Stock Upper Intake Manifold Plenum Gasket Included: No Quantity: Sold as a set. Mahle Original Intake Manifold Gaskets Common symptoms of poor intake manifold gasket sealing may include leaks, rough idling, and stumbling. For your next engine build, use Mahle Original intake manifold gaskets to seal your engine up tight! It's a known factproper sealing is vital to create