I did not know this, I’m sure most here do. If you get the Roush kit installed, go to the track, and blow something up. Ford will send a tech to look at the truck. He will spray your windshield with a solution, and if he sees numbers on your windshield, bye bye warrenty. No, soap will not remove all the marker, I’m sure something can though. So clean those windshields if you break your Roush.

Don’t post false crap please...it helps no one.

I’ve respected your advise so far Unbrocken, but the head service manager and the tech told me this. All 3 of us were standing around my truck shooting the ****. Maybe they were misinformed, or told to tell customers that. I happen to have my warrenty paperwork with me. I’ll start looking through the small print.

Never, ever believe anything you hear at a dealership. They literally know nothing when it comes to this stuff.

Weird is a square watermelon. This post means ford has warrantied my truck with 650 hp for 3 yrs 36000 miles. You break **** at the track. Hence, I was told that going to the track would void the warranty.

Anyone have their warranty voided yet?