Hy! this is my latest chop...a quick...c&c are welcome!
Stock:
Chop:

up!

Looks pretty clean, there is just a few things it could use to improve it. The new rear diffuser/exhaust seems a bit low res. The flat black/carbon you have on the trunk is a nice change for this car, but if you look close you see that you left the top of the trunk lid red, the whole thing should be colored. The smoked tailights look good, and the reflections on them seem to match the bg well.
Overall it's ok for a quick, there's just a few things that could have been a little cleaner.

woops, didn't see this one!

Chop looks cool, great style!
but the diffusor and trunk are a bit too bright imo.
and the roof has a lot of jaggies (even in HR).

otherwise its very well done!