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The universal flywheel makes it simple to connect engines of all styles. Its a heavy-duty part capable of handling huge power, and the same-weight flywheel will be used on all Challenge engines. It's this kind of adaptability we needed to make the Challenge happen, and we know professional engine shops like the ease of being able to use the same flywheel to connect any engine to the dyno with ease. The time savings (versus having to use different flywheels for different makes) is huge, and having to keep a single universal flywheel sure saves precious space in the dyno cell too.