Isn't it a special model for the spx.......best to message mike directl . Here is a link to his ebay add https://www.ebay.com/itm/400-430-45...:2AgAAOSwC1hck6CL:sc:USPSPriority!44875!US!-1
Yes it’s a different model I have the one for the Sp1 already , I sent an email to mike this morning .
AM&P also has them for the 350 engine with SP3 intake if anyone interested, I gave him specs and he made one for me, fits great.