Help With Laggy Mod.

[TehEpixBraxy]

So after 7 mod checks to see if it was laggy I finally was able to make it not laggy. I switched the frame to a longer one.  So after doing that I decided to make progress on it. I added a new sleeper, new exhaust, and a headache rack. Now when I join the game the game crashes and I have to log out to fix it. Does anyone know my problem because I cant seem to find it.