89a10 weights work good in a srx, maybe more of a lake running weight but still can be trail ridden with no problem, great topend. I would use a differnt helix then stock though, the 47 would be kinda flat, need something more like a 50/36-51/38 with them.
likely has all those shims to try and raise topend rpm as the 47 is too much laod for the weight of the 89a10s tip.