APR Bipipe

Reason:

The stock throttle body boot (TBB) is prone to being torn when operating the car at higher than stock boost levels.  The APR Bipipe is a single piece of metal pipe that replaces the TBB and up-pipes for more reliable operations at elevated boost levels.

Considerations:

Options Available:

Decision:

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Long-term Report:

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Audi B5 S4