Water-methanol injection has recently become a hot item in the racing and towing communities; its roots lie in pre-WWII fighter planes. The U.S. military began injecting a mix of water and methanol ...

As much as we like the 5.9L Cummins powerplant, the stock exhaust manifold is constrictive and contorted, interfering with the flow of gases to the turbo and downpipe. That, in turn, can produce the ...