！Before installation, confirm that：
This high-performance component does not comply with the laws and regulations for highway driving and cannot be used on any vehicle that has been registered or certified for use on highways. This means that the component may only be suitable for racing cars or other off-road vehicles. If it is installed on vehicles driving on the highway, legal issues will be borne by oneself.
This is the installation process for the DP-0170: 2017-2023 6.6L Chevy L5P Duramax Diesel 3.5" Downpipe Exhaust, for your reference during the installation process.
Step 1:
1.Disconnect the negative cable of the battery from both batteries. Remove the passenger side wheels and tires, as well as the inner fender pads.
2.Remove the rear heat shield (3 10mm bolts) from the passenger side exhaust manifold.
Step 2:
Remove the exhaust front pipe (4x15mm bolts) from the drain pipe, and dismantle the connection between the drain pipe and the exhaust system as well as the pipe support bracket connected to the engine block.
Step 3:
1.Disassemble the upper and lower pipe support brackets connected to the back of the cylinder head.
2.Remove the front rubber exhaust hangar from the exhaust system close to the transmission device. This step allows the exhaust to descend, leaving space for the disassembly of the drain pipe.
Step 4:
Remove front rubber exhaust hangar from exhaust system near transmission. This step allows the exhaust to drop to allow room for down pipe removal.
Step 5:
1.Ratchet strap placed around front of exhaust pipe near joint and wrapped under frame rail, and clipped at upper control arm may help provide leverage if needed to draw exhaust down and out of the way.
2.Remove, inspect for damage, and keep the exhaust ‘donut’ style gasket used between the OEM down pipe and the exhaust. This will be re-used later on when you install your new down pipe.
Step 6:
The following steps detail temporary removal of the EGR pipe to allow access to the V-band clamp at the top of the down pipe where it mates to the SCR.
1.Remove EGR Heat Shield, the upper installation bolts of the EGR and unplug the EGR temperature sensor.
2.Remove the EGR tube and set it aside, being careful not to damage the riveted gasket, which will require reinstallation later. Remove the sound insulation from the rear valve cover on the passenger side and take off the temperature sensor from the drain pipe.
3.Remove top bracket from downpipe and heat shield on SCR and temp sensor.
4.Loosen V-band clamp at inlet for downpipe,Rotate downpipe counter clockwise for removal out the passenger side
. 
Step 7:
This high-performance component does not comply with the laws and regulations for highway driving and cannot be used on any vehicle that has been registered or certified for use on highways. This means that the component may only be suitable for racing cars or other off-road vehicles. If it is installed on vehicles driving on the highway, legal issues will be borne by oneself.
This is the installation process for the DP-0170: 2017-2023 6.6L Chevy L5P Duramax Diesel 3.5" Downpipe Exhaust, for your reference during the installation process.
Step 1:
1.Disconnect the negative cable of the battery from both batteries. Remove the passenger side wheels and tires, as well as the inner fender pads.
2.Remove the rear heat shield (3 10mm bolts) from the passenger side exhaust manifold.
Remove the exhaust front pipe (4x15mm bolts) from the drain pipe, and dismantle the connection between the drain pipe and the exhaust system as well as the pipe support bracket connected to the engine block.
1.Disassemble the upper and lower pipe support brackets connected to the back of the cylinder head.
2.Remove the front rubber exhaust hangar from the exhaust system close to the transmission device. This step allows the exhaust to descend, leaving space for the disassembly of the drain pipe.
Remove front rubber exhaust hangar from exhaust system near transmission. This step allows the exhaust to drop to allow room for down pipe removal.
1.Ratchet strap placed around front of exhaust pipe near joint and wrapped under frame rail, and clipped at upper control arm may help provide leverage if needed to draw exhaust down and out of the way.
2.Remove, inspect for damage, and keep the exhaust ‘donut’ style gasket used between the OEM down pipe and the exhaust. This will be re-used later on when you install your new down pipe.
Step 6:
The following steps detail temporary removal of the EGR pipe to allow access to the V-band clamp at the top of the down pipe where it mates to the SCR.
1.Remove EGR Heat Shield, the upper installation bolts of the EGR and unplug the EGR temperature sensor.
. 1.Reinstall the sewer pipe temperature sensor removed from the stock component.
2.Install the new pipe through the passenger side fender well, transfer and store the exhaust gasket, and allow your new lower pipe to be properly sealed to the rest of the exhaust system for reassembly.
After reinstalling the upper and lower sewer pipe brackets, tighten the V-band clamps to fix the pipes and ensure that the connection points are fixed in place.
3.Reinstall the temperature sensor and heat shield onto the above-mentioned SCR reversing disassembly step. Reinstall the above EGR pipe reversing disassembly steps.
4.Reinstall the sound insulation cover on the valve cover reversal step outlined above.
5.Hoist the exhaust system back to its original position and reinstall the exhaust hangar.
6.Reinstall the V-belt clip and connect the exhaust system to the bottom of the downspout.
7.Reinstall the rear heat shield (3 10mm bolts) on the passenger side exhaust manifold
8.Reinstall the mudguard pads, wheels and tires.
9.Reconnect the battery cable.
10.After idling for a period of time, start the truck and check for any leaks.
11.This component has been coated with ceramic and may burn off oil during the first few drive cycles, especially during the regeneration process, which may cause unusual smoke/odor in the truck installation area. This is completely normal and will disappear after the first few thermal cycles of the part.
2.Install the new pipe through the passenger side fender well, transfer and store the exhaust gasket, and allow your new lower pipe to be properly sealed to the rest of the exhaust system for reassembly.
After reinstalling the upper and lower sewer pipe brackets, tighten the V-band clamps to fix the pipes and ensure that the connection points are fixed in place.
3.Reinstall the temperature sensor and heat shield onto the above-mentioned SCR reversing disassembly step. Reinstall the above EGR pipe reversing disassembly steps.
4.Reinstall the sound insulation cover on the valve cover reversal step outlined above.
5.Hoist the exhaust system back to its original position and reinstall the exhaust hangar.
6.Reinstall the V-belt clip and connect the exhaust system to the bottom of the downspout.
7.Reinstall the rear heat shield (3 10mm bolts) on the passenger side exhaust manifold
8.Reinstall the mudguard pads, wheels and tires.
9.Reconnect the battery cable.
10.After idling for a period of time, start the truck and check for any leaks.
11.This component has been coated with ceramic and may burn off oil during the first few drive cycles, especially during the regeneration process, which may cause unusual smoke/odor in the truck installation area. This is completely normal and will disappear after the first few thermal cycles of the part.
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