Not sure what material they are but mine came pre-installed. I can' imagine having that metal on metal clinking lol

They're PTFE on the newer bars.

Update on this:
Took the truck to the track on Friday night. Zero wheel hop!

I was not cutting the best 60ft's, but, i'll blame that on weather and track prep like everyone else does :whistling2:
I think my best was 1.78. Hoping to knock that down to 1.6x next time out.

If anyone is interested in a set of used VAS Traction Bars I just pulled them off today. Will post up a for sale thread later.
Fixing to install the RC ones hopefully tomorrow.

Price?

Once I get them boxed and weighed i'll post up the price but as long as shipping isn't crazy i'd like to get $300.
Should fit stock to lifted truck.

Here are the Rough Country bars installed. Just did a quick test drive and so far so good.
We'll see if we can take it to the track this weekend and she what she does.
Adds about 50lbs compared to the VAS bars lol. I think it looks good though.

https://cimg1.ibsrv.net/gimg/www.f15...b127d7e46a.jpg
https://cimg6.ibsrv.net/gimg/www.f15...f2b0e2a786.jpg
https://cimg5.ibsrv.net/gimg/www.f15...d33b9b25c0.jpg

those look good....gotta be worth a couple tenths just in style points alone!

does your truck have aluminum driveshafts?

It's the factory one piece for 9.75 axle but yes I believe it is aluminum.

Are you running on E30 Saturday night?