Woo nice and cheap that CXracing... the diameter of the piping is missing which is the big key.
I needed a 3.5 OD 3.25 ID. That was the closest tight fit.
I chose originally the 3.25 OD because I messed up and I swapped the OD/ID Sadly the length of this pipe is nicer so it fits better. The 3.5OD fits more snug, but the length of the piping is a bit long that you need to chop short (or it hits the end of the box if you keep the stock box).
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