I have not heard of that.
The Spa manifold is pretty thick @ the turbo mounting flange.
Mine is a T3/T4 hybrid turbo that I was going to use on my Syclone but decided not to use it, so I will use it on my L6 in the meantime.
Maybe Tom Lowe knows how thin the Spa manifolds get after drilling & port matching to the T4 flange?
MBHD
