Usually, nothing. They are just open vents.

 

Hmm well that kinda hinders it being useful up here then Don't really need melting snow or rain going through the vent's and soaking my air filter.

 

Check out what showed up in the mail today!



Thanks to Random User for the free hook-up!!
Gonna try throwing this on this weekend when I swap out the rear end. I have enough I think to do the front two cross-overs. Having those insulated should help a whole bunch!!

Thanks again Richard!

 

Damn that got there quick...I just sent it out on Tuesday.
USPS Flat Rate box FTW!

Soak it in water before you work with it. Latex gloves will be your friend too if you're sensitive to fiberglass. As you can tell it's pretty nasty stuff to work with. The soaking will help keep the fibers down and help it stretch around tight areas. Run the truck to let the heat dry it then spray it with that DEI stuff we talked about and it'll last a loooong time...if you decide to keep it on that is.

Good luck...hope it works well for you.

 

Since I own both styles a 99-02 and an 03- 07 Classic, I was taking a better look. The NNBS hood vents won't work on the 99-02 style hood. If you look at the hood on the 99-02 style they taper down toward the front were as the 03-07 classic are straight like the 07- Up NNBS. the top section is also closer in on the 99-02 style trucks and those vents would not look very proportionate to the rest of the design.

I would like to see a cowl induction on the 99-02 HD hood.

You could have him do the downward louver design like on the Fiberglass hood. I have the original hood off my truck...

 

Hate to bring Ford into the mix, but what about the vents on the hoods of the new Mustangs? From what I read, they're functional.

 

Back from the dead...waaaaaay back...
Any updates on anyone adding hood vents?
How'd the free wrap work out for you, Spoolin?

 

im interested in this too. i think i might do the camaro vents in my silverado cowl hood as i have forward headers and it gets pretty hot under there.

 

Back again...
Found this and wanted to share as Im looking for a heat extraction setup from my engine

 

^^^^^^That's exactly what I thought about doing, putting the new camaro heat extractor on but I've never seen anyone do it. Im kinda tempted now but they are like $300

I also found some knock off vents that look like the mustang on ones on ebay for $70 and I was gonna try putting those in a junk hood.