Arctic Cat announces new 858 Engine

September 2023 Feature

Arctic Cat has announced an all-new 858 engine, designed to be lighter, powerful and more durable. 

Purpose-Built for the CATALYST Platform

The 858 engine was purpose-designed to optimize the CATALSYT platform. This way, the rider is the active force providing more power with more precision and control. 

The design is based on decades of Arctic Cat innovation complemented by the ingenuity of the current team to ensure the engine components fit the CATALYST platform’s design. From working around the centerline steering to integrating components for weight reduction and increased performance, there were no compromises in building an engine that would take the Arctic Cat ride experience to the next level.

When designing CATALYST, Arctic Cat considered the different powerplants that would bhoused in the platform. The brand-new 858 engine is an even lighter package with a lower center of gravity creating a better power to weight ratio for a unique ride.

The innovative laydown engine design places the intake and exhaust in front of the engine allowing for the industry’s best mass centralization and lower center of gravity that the rider can feel for incomparable maneuverability. 

Optimized Power in the Industry’s Easiest to Ride Package

Along with its innovative design to complement the CATALYST platform’s mass centralization, the 858 engine provides the right amount of horsepower for superior performance.

A new air intake system that is integrated into the platform maximizes airflow to the engine for more power output. Multiple secondary, under-hood inletprevent snow ingestion and optimize performance in all snow conditions.

The new, patented exhaust valve design is the latest, most advanced in the industry. It stays tight to the piston as it moves and provides smoother exhaust port flow throughout a wider RPM range on both primary and auxiliary ports. It also provides seamless power and cleaner emissions.

Compared to Arctic Cat’s 800 engine, the 858 engine provides 11more power and torqueproviding quicker acceleration and a higher top speed.

More Power with Lighter Weight for an Exhilarating Ride

With its integrated engine mounting design and new exhaust system, the 858 engine is 4lighter in weight than the current 800 engineIt’s also lighter and provides a lower center of gravity compared to competitive engines.
To keep a lightweight, compact size for the CATALYST platform, Arctic Cat used a85mm bore while increasing to a 75.6 stroke to achieve more horsepower and deep, bottomless torque that pulls hard and smoothly through the entire RPM range. The result is a power-dense, easier to ride package.

Durable and Reliable to Spend More Time on the Snow

The CATALYST platform was designed to be durable and easy to service with its belt drive system and completely tool-less plastic panels that are removeable for access to critical components. The 858 engine was built to complement the platform. The resultsnowmobile that can withstand the rigors of riding and minimize time off snow.
Arctic Cat took learnings from the time-tested 400 and 800 engines and created the incredibly durable and reliable 858 engine.
The engine has fewer parts and integrated mounting design in the crankcasemaking it strong and easy to service.
The 858 engine is available across trail, crossover and mountain platforms.
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