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Video: Watch EFI-U’s 381-Cube 9,000-RPM LSX Mow Through The Gears

Video: Watch EFI-U’s 381-Cube 9,000-RPM LSX Mow Through The Gears

By Greg Acosta - November 20, 2018

While this may be a retired Competition Engine Development engine, its days of teaching lessons are far from over.

This 381-cube LSX-based engine turns insane RPM with GM Part Numbers.

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