The Pipes: The EFRA 3006 tuned pipe is based on the succesful EFRA 2052 tuned pipe. Again this tuned pipe can maximize the achievable power.
The EFRA 3007 tuned pipe is based on the somewhat tamer EFRA 2015 tuned pipe, this new tuned pipe is also tamer compared to the EFRA 3007 Tuned pipe. The EFRA 3006 is a very good pipe when drivability is important.

With the new regulations the 4 bypass holes in the 2nd camber are now not legal anymore, and combined with thicker walls will give a reduction in the noise level.

Manifold choice:
The short "Non conical" manifold (41022) gives you engine a lot of top speed or more power in higher RPM regions, but reducing bottom-end power.
This manifold is the best choice when you race at a fast track with long sweeping corners.

While the long "Non conical" manifold (41024) gives your engine more power at lower RPM, and reducing power in higher RPM, which makes this manifold good for use on tracks with tight technical "stop and go" corners.

The medium long "Non conical" manifold (41023) is a good compromise between the short&long manifold, and is the most used.