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Bumbera's Performance
X-Pipe vs. H-Pipe: Sound Quality and More
X-pipes and H-pipes Add Easy Horsepower, but Which is Best for Your Ride?
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Video: Comparing H-Pipe vs. X-Pipe Exhaust Systems and Which to Choose - OnAllCylinders
The Three Types of Pipes and their Differences: X-Pipe, H-Pipe and Y-Pipe - Trufit Exhaust
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Applied Sciences | Free Full-Text | The Effect of Back Pressure Change on Exhaust Emissions According to the Confluence Geometry of a Dual Exhaust System in Idling
