Because your trucks are nothing less than amazingly beautiful, I'm not letting you miss the details on this one...
The truck logo needs to be all red. You have it shifting into the normal yellow about halfway up. It's cool, but not accurate.
Flames should be a darker orange. You have them a little too light.
Monster Jam logo is squished into that corner, I'd suggest moving down next to the wheel well above the headers.
Also, in this picture it looks like the shock accents are purple, however I can't find any other pictures to confirm this... I'm seeing more pictures with them being black like you have, but I swear I saw them as purple usually...
Is it better? Yes, but it's not perfect quite yet. You're on the right track