Which header's primaries direct exhaust gases directly upward; do not use a collector?

• A. Stock Header
• B. Stepped Header
• C. Zoomie Header
• D. Dyno Header

Answer: (C)

Primaries direct exhaust upward when each cylinder’s tube runs upward and ends without a common collector. A zoomie header uses this exact layout: very short, individual tubes that shoot straight up from each cylinder and terminate near the top of the engine bay, with no collector merging them. This design keeps the exhaust exiting upward rather than feeding into a shared pipe, which is why it’s different from stock or stepped headers that route tubes toward a collector under the car, and from dyno headers which are built for testing and also typically use a collector. The result is a loud, distinctive exhaust and performance characteristics tuned for high-RPM power, though it may not be ideal for low-end street drivability or legality in some areas.