Hiya Grizz1 ended up buying that alpha 2090 pipe to try out.. haven't had a chance yet as it's been raining for days but at first look the divergent cone is the exact same as the 2072 .. can't see the convergent but the center straight section of the pipe is the same diameter but way shorter.. conversely the manifold is a bit longer.. It's a better fit in my 808 anyway.. better clearance both for the tank and the body so maybe I can avoid melting both this season.I'll report back on performance and what if any difference the stinger sizes make.. be trying it on both the GXII and the MG66.