Hey all, can you tell me if the OS VG .21 will bolt up to the rtr engine mounts? And what might be another engine choice around the same amount. I run on a tight, bumpy, loose track. Thanks you.

They should bolt up to the stock engine mounts without a problem. Just make sure you have them on the correct side. The stock Matrix mounts are off-set. If you don't have the mounts on the right way your clutch bell and spur gear will not line up properly.

Another engine you might consider is the Go Tech line of 21s. I would recommend the 3 port R Spec or the 7 port with a 2047 or 086 pipe.

Thank you tree1, I looked at the GO line, but am unsure of them being so new. But I will consider it. Thanks again.

I have a pretty new go tech 3 port sport .21 in My Matrix buggy. I LOVE IT! Its getting faster with every day at the track! idles great. Holds a good temp. Very fast. Very affordable.