Complex sentence: The C20XE engine featured in many General Motors vehicles including some models of the Opel Astra and the Opel Calibra, and was commonly referred to as the'Red Top' because of its pleasing and distinct appearance.
Split into simpler sentences: The C20XE engine featured in many General Motors vehicles including some models of the Opel Astra and the Opel Calibra. Enthusiasts commonly refer to this engine as the'Red Top' because of its distinct appearance.