SPI Polaris Carb Flange Boot – XC 500 / XC SP Snowmobile – OEM 1253217 Replacement

OVERVIEW

This SPI carburetor flange boot restores factory performance by sealing the connection between your carburetor and intake manifold on select Polaris snowmobiles. Engineered to replace worn or cracked OEM components, this fuel-system part prevents unmetered air from disrupting engine tuning while using durable, fuel-resistant construction built for sustained cold-weather operation.

ENGINEERING & PERFORMANCE

The flange adapter maintains stable engine operation by ensuring an airtight barrier between the carburetor venturi and intake tract. Constructed from stiff, fuel-resistant compounds that resist cracking under freeze-thaw cycles, this component holds precise tolerances to match original equipment dimensions. Its direct-swap design requires no modifications, allowing riders to restore consistent idle response and throttle stability without specialized fabrication.

KEY FEATURES

• Direct replacement for Polaris OEM #1253217
• High-quality carburetor flange boot / adapter
• Ensures proper sealing between carb and intake
• Prevents air leaks, bogging, and tuning issues
• Durable, fuel-resistant construction
• Designed specifically for Polaris XC-series snowmobiles
• Easy installation with OEM-style fit
• Manufactured to meet or exceed OEM specifications

TECHNICAL SPECIFICATIONS

• Brand: SPI
• Part Name: Carburetor Flange Boot
• Component Type: Fuel System Component
• Construction: Fuel-Resistant Polymer Composite
• Supported Years: 1999–2003
• Compatible Trims: Classic Touring, XC SP, RMK, Touring

FITMENT

• Polaris 600 Classic Touring (2001–2003)
• Polaris 600 Touring 136" (2002)
• Polaris 600 XC SP 121" (2000–2001)
• Polaris 500 XC SP 121" (2000–2001)
• Polaris 500 RMK (1999–2000)

WHY RIDERS CHOOSE THIS

Riders install this flange boot when stock gaskets harden, crack, or fail to seat properly under extreme cold. The fuel-resistant compound stays flexible through temperature swings, maintaining a consistent barrier around the carburetor venturi. By eliminating unmetered vacuum leaks, the component restores predictable idle behavior and smooth throttle blips without requiring jetting changes. Engineered to duplicate original mating surfaces, it drops directly into existing intake manifolds while preserving the sled's tuned air-fuel balance.