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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Doc Race DR700



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      06-03-2026, 09:13 AM   #1
Jewbaaca95
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Drives: E90 335i
Join Date: Dec 2013
Location: Louisville

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Doc Race DR700

Has anyone else had nothing but trouble with this kit? Mine is at 8,000 miles over roughly 4 years. On the second manifold (cast) and I suspect it is now cracked based on how the car acting again. Doc Race stopped responding, but given they stopped selling these quickly after their release we know the design is suspect. Just wish they stand behind their stuff and swap me hot parts to go top mount and stop dealing with issues.
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