The MBRP GM8427 3" Turbo Downpipe provides a smoother flow from the turbo in your 2011-2015 GM 6.6L Duramax. Removing the restriction in the factory downpipe results in lower EGTs and increased performance. The down pipe is relatively easy to install due to the precision bends that youve come to expect from MBRP.
The OEM removal is a pain in the a$$ but successfully installed MBRP downpipe. Did notice the power and torque went up slightly. THE MAJOR ISSUE HERE, the pipe leaks diesel fluid from the 9th injector. The truck was doing a regen when I noticed my truck smoking under the hood. I was close enough to a deal that I pulled the truck in and they got me right in. They knew right away what the issue was. It is a known issue that it can leak fluid even with the stock down pipe. That is also why there has been notices sent out from GM about it. If you check out the 2015.5 and up they have a 3 bolt gasket. So back to the dealership, I had them try to adjust the fitment to correct the issue. They tried and did a force regen and yet again it still leaks fuel. They request they factory downpipe to be reinstalled and luckily I held on to it. They installed it and also installed some sort of sealant between the downpipe and the upper pipe of the exhaust.I contacted MBRP and got a hold of Candice she was very nice to me. They requested I send the pipe back for inspection. I also supplied documentation from the dealership saying it doesn't fit to provide a proper seal. I also supplied pictures and documentation to fix this problem. All of my input was pointless, because they didn't care. It took them A MONTH to get the pipe just to inspect it. I sent it back on the note that if it bet their standards I wanted my money. Well they said it meets their "fitment standards". So I had to pay $20 just to ship my pipe back to me.In conclusion I will not be buying from MBRP and I suggest no one buy this pipe if they have an OEM equipped truck. Even though it says it will work on a factory equipped truck.
XDP continues to closely monitor the COVID-19 (Coronavirus) outbreak. As an integral part of the automotive supply chain, at this point all call centers and distribution centers remain fully operational to ensure we keep vital service components flowing to vehicles used in transport of goods and emergency response. To ensure the health of our employees, families, and customers, we have made the following procedural changes:
UPDATE: Effective 6/1 Customer Service resumes normal business hours of M-F 8:30 – 9:00pm EST.
Effective 3/18 we have decided to temporarily close both of our retail stores in NJ and NV.
Our technical sales team remains available Mon-Fri 8:30am-9pm and Saturday 10:30am-7pm EST.
All employees have been encouraged to follow the CDC's recommendations at home and in the workplace.
The circumstances of this virus are fast moving, as such, we will continue to update you with any further operational adjustments as needed. As always, we value your business and appreciate your patience as we manage this situation together.
This product is not legal for sale or street use in California. Certain aftermarket products are subject to governmental emission standards regulated by the California Air Resources Board. In order for these products to be legal on a specific vehicle in California, the part number must receive a CARB Executive Order (EO) number. This number makes the part legal for use only on specific years, makes and models of vehicles. A decal with CARB EO number for these parts must be displayed in the engine bay to satisfy smog inspection requirements.