Interchangeable Internal Pipe Stingers for Polaris Patriot 850 & 9R // SKU: 01-328-L / 01-328-H / 01-328-9R

SKU: 01-328-H
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$59.95 USD
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Interchangeable Internal Pipe Stingers for Polaris Patriot 850 (High Elevation) & 9R // SKU: 01-328-H / 01-328-9R

Primary Application: High-elevation Polaris Patriot 850 models and Polaris 9R models equipped with a Bikeman Performance Fatt Azz Single Expansion Pipe.

Dial in maximum expansion chamber pressure, instant throttle response, and consistent peak horsepower with Bikeman Interchangeable Internal Pipe Stingers. Thin mountain air and high-revving 2-stroke engines reduce internal pipe backpressure, causing horsepower fade, engine bog, and sluggish throttle response. Installing the proper internal stinger restricts exhaust flow just enough to restore optimal operating pressure, keeping your Patriot 850 or 9R locked in its peak horsepower powerband.

These drop-in stinger inserts also offer a massive advantage for drag racing and competition applications. Running a tighter stinger profile builds exhaust heat inside the expansion chamber much faster, requiring significantly less pre-heating time on a rev stand before launching off the line.

Key Performance Features

  • High-Elevation Backpressure Compensation: Restores lost internal expansion pipe pressure in thin air to eliminate mountain horsepower fade and powerband sag.

  • Fast Reaction Racing Warmup: Restrictive stinger geometry builds exhaust gas temperatures rapidly for immediate pipe heat and crisp off-idle throttle response on the starting line.

  • Tailored Engine Calibrations: Available in distinct flow profiles engineered specifically for high-mountain elevations (Patriot 850) or high-revving 9R backpressure curves.

  • Quick Swap Design: Inserts cleanly into your Bikeman pipe, allowing easy on-the-fly backshift and pressure adjustments for changing riding locations or race conditions.

  • Heavy-Duty Heat Resistance: Precision-machined from high-temperature steel to withstand extreme exhaust gas velocity and heat without warping or necking down.

Elevation & Sizing Selection Guide

Select the correct stinger part number from the options on this page based on your engine platform, primary riding elevation, or racing application:

  • High Altitude Internal Stinger (High Elevation & Race) // Part #: 01-328-H: High-restriction stinger designed for mountain elevations (6,000+ ft) or race applications where rapid pipe heat buildup is required to restore lost backpressure on Patriot 850 engines.

  • Polaris 9R Specific Internal Stinger // Part #: 01-328-9R: Custom-calibrated stinger engineered specifically for the unique backpressure requirements and high-revving characteristics of the Polaris 9R engine.

Product Specifications & Compatibility

  • SKUs: 01-328-H (High Altitude 850) / 01-328-9R (9R Platform)

  • PIPE FITMENT RULE: Designed EXCLUSIVELY for use with the Bikeman Performance Fatt Azz Single Expansion Pipe (SKU: 01-328). Will NOT fit or function in a factory OEM Polaris expansion pipe.

  • Engine Fitment: High-Elevation Polaris Patriot 850 & Polaris 9R (AXYS & Matryx Chassis)

  • Function: Regulates internal expansion chamber backpressure and exhaust gas velocity

  • Package Inclusions: One (1) Interchangeable Internal Stinger Insert (Select desired size/application on product page)