***Danger Will Robinson Danger***
The price is pretty reasonable. However for the money I would consider this:
If you put a TD05HL-15G cartridge in a properly machined 13C turbine and compressor housing you will still have a turbo optimized for turbocharged lawnmowers.
The 13C comes with a 6cm2 housing, this is the area at the smallest point in the neckdown of the turbine inlet. They are already extremely restrictive which mated to a 13C wheel, a problem that will be increased by a higher flowing 15G wheel. In other words, you'll be adding intake pressure without relieving exhaust manifold pressure, thereby skyrocketing your EGTs. A 15G comes standard with a 7cm2 housing!
Have you ever seen the turbine housing on your 13C glow? It isn't necessarily overspeeding the turbo that is causing this, it is the instantaneous spool and marked loss to zero top end you're feeling now. I sincerely believe a stock 13C car would benefit hugely from a serious port job, but you need a good starting point.
I'm not TELLING you to buy a turbo from me, but I'm suggesting you do a true 15G and not some hybrid cobbled up BS that's going to cost you more money in the long run, since you'll be replacing it or exhaust valves when you really push the envelope.
PM me, post here, or call me 336-509-8589...I am more than willing to answer any of your questions.