SPi Radiator Cap – Polaris / Arctic Cat / Ski‑Doo / Lynx – 0.9 Bar 13 PSI – Fits Grand Touring, GTX, GSX, Legend, Expedition, Mach Z – 2003–2009 Models

OVERVIEW

The SPi Radiator Cap maintains steady cooling system pressure to prevent boil-over and coolant loss during aggressive trail or tour riding, engineered specifically for Ski‑Doo snowmobiles. Constructed with precision-machined valve seating and durable elastomer seals, this direct-replacement accessory restores factory-rated thermal regulation across multi-engine platforms.

ENGINEERING & PERFORMANCE

This cap retains a consistent.9 Bar (13 PSI) internal pressure threshold, which raises the boiling point of antifreeze mixtures and ensures uninterrupted heat exchange through the radiator core. The reinforced lid aligns with standard fill neck tolerances, preventing vapor leaks and reducing the risk of sudden heat spikes during sustained high-RPM operation. Engineered for direct bolt-on mounting, it eliminates the guesswork associated with aftermarket adaptation and restores reliable thermal management across compatible chassis designs.

KEY FEATURES

• Radiator cap designed for snowmobile cooling systems
• Operating specification:.9 Bar (13 PSI)
• Compatible with multiple Ski‑Doo grand touring and trail models
• Supports production years 2003 through 2009
• OEM-style replacement profile for direct fill-neck mounting
• Engineered to withstand repeated engine heat cycles
• Factory-compliant threading ensures secure lid engagement
• Maintains steady pressure during high-load trail operation
• Replaces degraded or leaking original equipment parts

TECHNICAL SPECIFICATIONS

• Brand: Sports Parts
• Part Name: SPi Radiator Cap
• Part Type: Cooling System
• Supported Years: 2003–2009
• Compatible Trims: Grand Touring, GTX, GSX, Legend, Expedition, Mach Z

FITMENT

• Ski-Doo Expedition 600 TUV REV-XU (2009)
• Ski-Doo Grand Touring 380 Fan (2003)
• Ski-Doo Grand Touring 500 Sport (2003)
• Ski-Doo Grand Touring 550 Fan (2003)
• Ski-Doo Grand Touring 600 SE (2003)
• Ski-Doo Grand Touring 600 Sport (2003)
• Ski-Doo Grand Touring 700 SE (2003)
• Ski-Doo Grand Touring 700 Sport (2003)
• Ski-Doo Grand Touring 800 SE (2003)
• Ski-Doo Grand Touring V-1000 Sport (2003)
• Ski-Doo GSX 500SS Sport (2004)
• Ski-Doo GSX 600 (2004)
• Ski-Doo GSX 800 (2004)
• Ski-Doo GTX 1200 Limited (2009)
• Ski-Doo GTX 1200 SE (2009)
• Ski-Doo GTX 380F (2005–2006)
• Ski-Doo GTX 500SS Sport (2005–2009)
• Ski-Doo GTX 550 Fan (2005–2009)
• Ski-Doo GTX 600 (2005)
• Ski-Doo GTX 600 Limited (2005–2009)
• Ski-Doo GTX 600 Sport (2005–2008)
• Ski-Doo GTX 800 (2005)
• Ski-Doo GTX 800 Limited (2006–2007)
• Ski-Doo Legend 380 Fan (2003–2004)
• Ski-Doo Legend 500 Fan (2003)
• Ski-Doo Legend 500 Sport (2003–2004)
• Ski-Doo Legend 550 Fan (2004)
• Ski-Doo Legend 600 SE (2003–2004)
• Ski-Doo Legend 600 Sport (2003–2004)
• Ski-Doo Legend 700 SE (2003–2004)
• Ski-Doo Legend 700 Sport (2003–2004)
• Ski-Doo Legend 800 SE SDI (2003–2004)
• Ski-Doo Legend Touring V-800 (2007–2009)
• Ski-Doo Legend Trail V-800 (2007–2008)
• Ski-Doo Legend V-1000 (2004)
• Ski-Doo Legend V-1000 Sport (2003–2004)
• Ski-Doo Mach Z 1000 (2005)

WHY RIDERS CHOOSE THIS

Riders select this replacement cap because it restores precise pressure control that older or compromised units often fail to hold under sustained heat. The sealed valve assembly keeps coolant contained during steep climbs and heavy loads, preventing air pockets that trigger overheating warnings. Its factory-matching diameter and threaded collar allow quick removal for winter storage and rapid refilling on remote trails. By maintaining stable thermal equilibrium, this simple yet critical component extends radiator lifespan and keeps engine temperatures predictable across long backcountry runs.