A boxer engine is another way of saying a horizontally opposed engine. This means the pistons lay horizontally instead of vertically or in a V, and they go from side-to-side rather than up-and-down. Due to their unique construction, boxer engines offer a lower center of gravity than inline or V style engines. This helps improve straight line stability while decreasing body roll in and out of corners. Boxers contrast most commonly with Inline, V, and W style engines.