The Tigercat 855D is a high performance, fuel efficient Tigercat FTP powered feller buncher. The machine is powered by a Tigercat FPT N67 Tier 4f engine which is rated at 210 kW (282 hp) @ 2,200 rpm.

The engine has an emissions system named Adblue (also known and DEF or SCR). Our team at Alt Tune have developed solutions to allow the system to be removed.

But why would someone want to remove the Adblue (also known and DEF or SCR) system?

Tigercat 855D’s are often used in remote areas where it is hard to transport the fluids needed to top up the system. In addition if a component on the Adblue system fails (such as a pump or level sensor) the operator may have to wait weeks for the new part to arrive. This down time can be costly.