2003-2005 Ski-Doo Summit 144\" Slide Rails 503190278 503190402 OEM Pair For Sale - New and Used

This is a Pair of original OEM Ski-Doo 144\" Rear Suspension Slide Rails (Part #503190278 / 503190402). These genuine structural components were removed from a clean, dry-stored 144\" Summit and have been thoroughly cleaned and inspected. These rails are the primary backbone of the SC-10 III suspension, providing the mounting points for the torque arms, idler wheels, and track shocks.

As parts from a well-maintained trail machine, these rails are in excellent functional condition. They have been meticulously checked for \"tweaks\" or lateral bends—critical for a 144\" rail that often sees mountain use. The mounting holes for the torque arm and scissor links have been inspected for \"ovaling\" or stress cracking to ensure a tight, factory-spec fit. Unlike aftermarket rails that can vary in alloy strength, these genuine BRP extrusions maintain the factory-spec rigidity and suspension geometry required for your ZX or early REV chassis.

• Part Number: 503190278 (Fits both RH and LH)

• Track Length: 144\"

• Condition: Used. Cleaned and inspected for straightness and hole integrity.

• Material: High-Strength Extruded Aluminum.

• Function: Main structural support for the 144\" SC-10 III rear suspension skid.

Fitment

Based on research, these 144\" rails fit the following Ski-Doo Summit models utilizing the SC-10 III suspension (typically 2003–2005):

• Summit 600 HO / 800 HO (REV Chassis): 2003–2005

• Summit 600 / 700 / 800 (ZX Chassis): 2003

• Note: These are specifically for the 144\" track length. They will not fit the 121\" MXZ or 136\" Renegade models without extension kits. Please compare your original rail profile and hole pattern to the photos provided.

OUR PLEDGE

We are a Veteran Owned and Operated distributor based in the Upper Peninsula of Michigan. All parts are inspected by our Arctic Cat Master Certified Technician to ensure you receive a quality, usable component. We pride ourselves on fast shipping and honest descriptions.

SHIPPING RATES

• USA: FREE SHIPPING to the Lower 48 States.

RETURNS

• 30-Day Return Policy on all non-electrical items.

• NOTE: There is a 20% restocking fee on all returns.

• NO RETURNS ON ELECTRICAL ITEMS. Please verify your rail length and part number before purchasing.

While we provide known part numbers and model origins, it is the buyer\'s responsibility to verify fitment for their specific application. Please measure your original rail length (approx. 144\") before ordering.

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