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7L 4" Flex Pipe Back Single No Muffler (411029 / 412029)
and putting Powerstrokes in their place
2020-2026 Duramax 3
The new KC38r compressor wheel is drastically different
Demand a stronger part
Webasto Thermo Top EVO Diesel Coolant Heater Kit 12V w/ SmarTemp (5013379A) 2006.5 - 2007 GM Cooling Systems 7L 4" Flex Pipe BackWebasto Thermo Top EVO Diesel Coolant Heater Kit 12V w SmarTemp (5013379A) From trucks to buses to off highway equipment, the Thermo Top EVO is the most widely used coolant heater with over a million at work. 17,000 Btu h of heat will bring the engine up to operating temperature so it's running efficiently. That means you save fuel, reduce engine wear, maintenance costs and exhaust emissions by not idling.
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