Insulting as a car guy be like:

You’re more useless than a sway bar on an F-16!
You’re slower than a prius towing a humvee!
You’re stupider than a plywood spoiler on a Ferrari!

You’re so poser you might as well be a big block mid-70s American muscle car!

You’re as good as the plastic air intakes on a 2004 mustang.

You’re as useful as a bike rack on a stanced honda civic

You’re as useful as the trunk in an MX-5

Damn, it has pop-ups?!

How to really insult any car guy: "Your car sucks."

You are as powerful as honda’s torque