RPM Pro R "Big Core HeadPipe" Header Pipe type_drive-belt The 7 XL Linkable setup

The 7 XL Linkable setup includes the following:

Manufacturer Part Number: DD7699

Commonly used in applications that demand the best in quality and performance

PART # GEN-05300

(8) ½-13 THIN nylon insert locknut

RPM Pro R "Big Core HeadPipe" Header Pipe type_drive-belt The 7 XL Linkable setupPro R "Big Core HeadPipe" Header Pipe Often hated is the Pro R's "out of frame" head pipe. Make no mistake this is the most efficient head pipe design for this engine and we wont bore you with information in regard to gas wave propagation, cylinder overlap timing, gas particle flow, and proper exhaust pressure waves. Let's just say Polaris had help designing the head pipe the way it is, and there wasn't a lack of R&D. Does this mean it's perfect? No.