BRC Diff Breather - Installation (Part B)

So as per the previous installment, we have the competition breather kit mounted in the engine bay. Now its time to run the breather lines to it.

1. First, remove the stock diff breather plug on the rear diff and replace with one of the plugs supplied in the BRC kit.
2. Once installed, connect the BRC poly breather line to the plug then run up to the top of the fuel tank, along the same path that the brake lines take. Drop the line out along the chassis rail. Put some 7mm split conduit onto it and run into the chassis rail as shown in the photo. The split conduit only needs to be long enough to cover the entry point into the chassis rail to stop rubbing the poly line.
3. Run the poly line through the chassis rail up to the inside of the passenger wheel well. Feed the line out through the hole shown in the photo and again use some 7mm split conduit to protect it.
4. Finally run the poly line up to the BRC breather manifold, which should be directly above the exit hole in the wheel well. Trim to size and fit.
5. You will notice that underneath the BRC manifold is the two factory installed breather tubes. We will now plumb into this using some fuel line barbs. For the larger breather, I got some brass fitting from my local auto parts store. The smaller end of the barb was still to large to easily fit onto the poly line, so I used a heat gun to warm up the poly enough to slide it on.
6. With the poly line fitted to the barb, remove the factory breather cap and install the new barb. Finally run the line up to the breather manifold and connect.
7. The same process is followed for the smaller breather line, but instead of using a reducing barb, a straight 4mm barb will work to connect the poly line to the rubber line.

1. Remove the factory breather plug from the rear diff.

2. Install BRC supplied breather plug.

3. Install the poly line into the connector. (Simply push it in)

4. Run the poly line up to the fuel tank following pre-existing lines. Cable tie in place with slack so it can move with axle articulation.

5. Conduit installed over the poly line and running into the chassis rail.

6. Poly line exiting the chassis rail inside the wheel arch (no conduit installed yet).

7. Conduit now installed and running up into the engine bay.

8. I labelled the line since five will be run into the manifold, so this makes them easily identifiable.

9. Installed into the BRC competition manifold.

10. Brass reduction barbs to fit poly line into pre-existing breather line.

11. Since barb was larger than the internal diameter of the poly line, I used a heat gun to warm it up enough to fit it.

12. Installed into the manifold and onto the pre-existing line.

13. Two lines down, two to go!