M MATI Rear Brake Caliper Assembly for Polaris Sportsman 400–800 with Pads — Complete OEM-Fit Replacement

M MATI Rear Brake Master Caliper Assembly is a direct-fit replacement caliper with pads and bracket built to OEM specifications for compatible Polaris Sportsman models.

This rear brake caliper assembly (Manufacturer Part # 1911075, Replacement # 1910690) is supplied complete with brake pads, mounting bracket and seals so you can install a ready-to-use unit without custom machining or major adjustments. Machined alloy pistons and an anti-ageing seal kit aim to restore braking force and resist leakage or premature wear. The unit fits a broad range of Polaris Sportsman ATVs from model years 2003–2015 as listed, including some 6x6 configurations where it serves rear left, rear right or middle positions.

Which Polaris models and years will this caliper fit?

This assembly is designed to match specified factory fitments for many Sportsman variants. Check the exact model and year against the list to confirm compatibility before ordering. Some 6x6 and special editions accept this caliper in multiple rear positions.

• Sportsman 400: 2003–2005
• Sportsman 450: 2006–2007
• Sportsman 500: 2003–2009 (excl. 6x6, X2, Touring)
• Sportsman 600: 2003–2005
• Sportsman 700: 2003–2007; Military 2010
• Sportsman 800: 2005–2009 (excl. X2, Touring); 800 6X6: 2009–2014 (rear left/right/mid)
• Sportsman MV7: 2005
• Forest 800 6X6: 2015 (rear left/right/mid)

How is this caliper assembled and what parts are included?

The package arrives as a complete rear brake master caliper assembly ready to install. It includes the caliper housing, pre-installed pads, the mounting bracket with American-standard threads, pistons and an anti-ageing seal kit so no additional internal rebuild is required for typical replacement jobs.

• Complete caliper housing with alloy pistons
• Brake pads pre-fitted inside the caliper
• Exact-fit mounting bracket (American standard thread)
• Anti-ageing seals and hardware for immediate installation

What performance and durability features should I expect?

The caliper uses precision-machined alloy pistons and upgraded seals to maintain braking pressure and reduce the likelihood of fluid leaks. The materials are selected for longer service life compared with worn OE components, helping to restore pedal feel and stopping performance when fitted correctly.

• Alloy pistons for consistent pressure and corrosion resistance
• Anti-ageing seal kit to reduce fluid leaks and degradation
• Pre-installed pads for immediate use after fitting
• OEM-spec bracket ensures correct alignment and thread compatibility

What installation or post-purchase support is provided?

The part is built to the same mounting and thread standards as the original to allow direct installation without custom adjustments in most cases. If you encounter issues within the first year, customer service is available to address product problems and provide support.

• Direct-fit design—no major adjustments expected
• Service and support for product issues within 1 year
• Includes part numbers 1911075 (manufacturer) and 1910690 (replacement) for verification

Who is this for: This M MATI rear brake master caliper assembly is intended for Polaris Sportsman owners, mechanics and ATV repair shops needing a complete rear caliper replacement that matches OEM mounting and performance expectations. Choose this unit if you want a ready-to-install assembly with pads and seals for compatible Sportsman 400–800 models and selected 6x6 or specialty variants. Always verify model year and rear position fitment before purchase to ensure compatibility.