Cm870 550 hp egr problems

[Unilevers]

i believe its a 4 and a 6 for both the midrange cpl and the bigger one its the small cpl that has the 6/6. Without a ESN im just taking a educated guess that your CPL is 8519 which is the midrange CPL and 8518 is the larger CPL. 8519's run well though when tuned and can produce tremendous horsepower aswell. I tuned one a few weeks back that layed down 670/2050 to the ground and was only 850 degrees post pyro - there was more room to go but that was enough for the owner.

the difference between the 8519 and 8518 is turbo and on some occasions cam.