This bolt set is a great fit for 2001 - 2016 GMC/Chevrolet HD models with a 6.6L Duramax engine. It features an OEM design with washers. The steel 12 - point screws have a black oxide finish and are class 12.9. The thread length is increased to fit the washer thickness, and two screws are 5 mm longer to accommodate the downpipe mounting bracket. This design also preserves thread engagement. The set includes (10) M10 x 1.5 x 32 bolt and washer, (12) M10 washers, and (2) M10 x 1.5 x 37 bolt and washer. Part Number: 116121500.

Using this bolt set is easy. First, make sure your vehicle is the 2001 - 2016 GMC/Chevrolet HD with a 6.6L Duramax engine. Then, you can replace the old bolts with these new ones. When installing, be careful to align the bolts properly to ensure a good fit. For maintenance, keep the bolts clean and dry. If you notice any signs of wear or damage, replace the bolts right away. Remember to use the correct tools for installation and removal to avoid any damage to the bolts or your vehicle.