T-Man Custom Breathing System

Introducing our new T-Man Custom M8 Head Breathers. These breathers are the third component of our new M8 breathing system. It was developed to help ensure a positive seal on the head breathers, while also providing twice the volume area than the stock breather that comes with your Harley-Davidson. It also has a double o-ring seal to prevent leakage between the head and the breather porthole. We have seen this product help with blow-by on motors when installed, although it is not a solution for oil blow-by issues. This system will enhance your higher compression or big bore motors.

This service is a go-to on all of our Twin Cam and Milwaukee 8 builds. When installing external breathers in your heads, you eliminate the chance of any oil being blown into your intake track, reducing fuel contamination and the chance for detonation. When installing these kits in-house, we prefer to run the breather hoses right back to the oil tank (see picture for location on both Twin Cam and M8). This makes for a maintenance-free system; routing your breather to the oil tank will require the use of our Oil Pan Vent Kit. You can also run the breathers to an external filter or a catch can. We can machine the breathers during our CNC machine process. We recommend all M8 external breathers be installed on our CNC machine because of the angle they need to be drilled.

For more information on installation, click here. to see a video.