Cylinder head porting on a diesel engine refers to the process of modifying the intake and exhaust ports to increase the amount of air going into the cylinder. Porting the heads provides the finely detailed attention required to bring the engine to the highest level of efficiency. It has been said that an internal combustion engine is nothing more than an air pump, and the more air it can pump, the more power it will make. Most often the guy who pays his bill without questioning it is the one who has already tried porting and has an idea of the work involved. Success at head porting does not happen overnight. It takes skill and practice. We offer over 30 years of head porting and air flow experience. We are asked all the time, does it help to port diesel heads when you can increase the boost? The answer is ABSOLUTELY. When you increase the boost, you put more air in the cylinder. When porting is done right, it will also put more air in the cylinder. Together you maximize the air flow and the horse power.