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Catalyst 858 Stage 3
Our best performing 858 kit! making 50+ HP midrange gains and an an...
USD $3,299.95 -
Catalyst 858 Stage 2
Turn your 858 into a rocket with this stage 2 kit! making 40+ HP...
USD $2,799.95 -
Catalyst 858 Stage 1
Our stage 1 is no questions asked, the best bang for your buck in the...
USD $2,099.95 -
Catalyst Belt Drive Assembly
PREORDER The ONLY aligned Belt drive assembly on the market for the...
USD $899.95 -
858 Pro-Cool Billet Head
Our Billet Head for the Arctic Cat 858 is an easy way to bolt on some...
USD $439.95 -
Catalyst 600 Stage 1 Budget
Get more power out of your Catalyst with this one simple mod! Our stage...
USD $1,139.95 -
CATALYST 600 STAGE 1
Get more power out of your Catalyst with this one simple mod! Our stage...
USD $1,449.95
KOSO DIGITAL GAUGES There are 11 products.
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Koso Wideband Air/Fuel Ratio Gauge Koso Wideband Air/Fuel Ratio Gauge
This nice back lit Wideband Air/Fuel Ratio Gauge will give you precise information on your engine. This will help you determine if your engine is running rich or lean. Very good engine tuning tool. ON SALE!! NORMALLY $374.95, SAVE $37!! This nice back lit Wideband Air/Fuel...
USD $374.95
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Weld-on Bushing for EGT Sensors Weld-on Bushing for EGT Sensors
WELD ON BUSHING FOR EGT SENSORS WELD ON BUSHING FOR EGT SENSORS
USD $28.95
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O2 Sensor Adaptor - For 2 Stroke Engines O2 Sensor Adaptor - For 2 Stroke Engines
TWO STROKE PIPE SENSOR ADAPTOR, for wide band 02 sensors when used on 2 stoke engines. Extends the life of the sensor and prevents premature failure. TWO STROKE PIPE SENSOR ADAPTOR, for...
USD $43.95
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X-2 Boost Gauge with Wideband Air/fuel... X-2 Boost Gauge with Wideband Air/fuel...
This X-2 Boost Gauge is a great tool for all horsepower enthusiast that are upgrading their engine with Turbo or Supercharger. Following many requests, we came up with a unit that combines Boost, air/fuel ratio and a temperature function who can be installed on the cooling system or the intercooler. This gauge is made to resist cold temperature, water or... This X-2 Boost Gauge is a great tool...
USD $599.95
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X1 BOOST GAUGE KOSO X1 BOOST GAUGE KOSO
Today many horsepower enthusiasts are upgrading their engine with Turbo or Supercharger. For this reason we came up with this basic X-1 Boost Gauge with warning and peak functions. Made to resist cold temperature water or dust the X-1 Boost Gauge can be adapted to any engine with turbo or supercharger. ON SALE NOW!! SAVE $20!! Today many horsepower enthusiasts are...
USD $218.95
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MINI STYLE THERMOMETER - KOSO MINI STYLE THERMOMETER - KOSO
Mini Style Thermometer This Mini Style Backlighted LCD Thermometer will give critical informations on the engine temperature. Its small size makes it easy to install. The changeable internal battery allows to install it on any vehicle Mini Style Thermometer This Mini...
USD $55.95
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EGT-01 Single EGT meter with Fast... EGT-01 Single EGT meter with Fast...
This nice backlighted EGT-01 Single EGT meter will give you precious information on your engine. It will allow you to tune your engine more precisely. Its warning could even save your engine from failure! Backlit so you can see easily, and high limits can be set at a preset temp so that it backlights RED to notify you easily before engine failure could... This nice backlighted EGT-01 Single...
USD $227.95
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A/F Ratio Sensor – Wideband Bosch LSU 4.2... A/F Ratio Sensor – Wideband Bosch LSU 4.2...
A/F Ratio Sensor – Wideband Bosch LSU 4.2 Lambda Replacement A/F Ratio sensor is a wide band BOSCH oxygen sensor that fits on the X-2 Boost Gauge with Wideband Air/fuel Ratio & Temperature, and the Wideband Air/Fuel Gauge. A/F Ratio Sensor – Wideband Bosch LSU...
USD $109.95
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COOLANT HOSE ADAPTER COOLANT HOSE ADAPTER
Use this hose adapter when adding a temp sensor to your machine. Just pick out the correct inside diameter of the coolant hose that you will be adding the adaptor to. The Koso sensor threads right into the adaptor for a easy and clean installation. Use this hose adapter when adding a...
USD $29.95
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O2 BUNG MILD STEEL O2 BUNG MILD STEEL
02 SENSOR BUNG FOR WELDING IN YOUR PIPE OR MUFFLER MILD STEEL 02 SENSOR BUNG FOR WELDING IN YOUR...
USD $8.95
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O2 BUNG STAINLESS STEEL O2 BUNG STAINLESS STEEL
02 SENSOR BUNG FOR WELDING IN YOUR PIPE OR MUFFLER STAINLESS STEEL 02 SENSOR BUNG FOR WELDING IN YOUR...
USD $10.95
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