Rockblocker Yay or Nay?

What I've read those with them like them. I suggest if you get them to take them out and let them dry when you wash car so you don't have moisture staying up against the paint for extended time. Not that it would most likely hurt any thing.

I’m on the fence about a solution for this, but if I decide to do it I would go with the solution on auto fanatic’s you tube channel. A deflector that would protect all the paint, not just a foam blocker...

Just installed them, good investment, saves your fairing; your fairing is designed for high speed track use, not for daily driving or cruising, food for thought.

I had these left over from my 2017 GT PP. They fit the GT350. Spendy for what they are, but they are so easy-peasy to install and remove, and provide significantly more protection than the foam rock blockers:

https://www.americanmuscle.com/splashguard-front-set-2015.html

I lube them with some detail spray when I install them, and clean the rubber pinch bits when I remove them to wash the car.

They do work great for paint protection and keeping the lowers clear of small rocks, but I made my own, had some closed cell urethane foam lying around.

Yes a must. You will see a short drive and the pebbles will add up. I live in the Sierra foothills and think they should be standard equipment.

So nobody thinks this aero bits are purposeful?

aveisone said:

So nobody thinks this aero bits are purposeful?

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If you're Randy Pobst, running the car at 10/10ths on the track, they might make a difference in lap times. For street driving, you might pay a small mpg penalty.

Gasoline is cheaper than paint.

aveisone said:

Can anyone shed some light on the positive and negative effects of installing the little foam blockers?

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I installed the blockers when the car was brand new just to keep that area of the car clean from debris & damage and they have made a huge difference and you really don't even notice they are there until you are detailing. And I've been to 150mph twice since the install and they are still there. Really easy to remove & reinstall if you were going to a car show or something. I recommend them.

extrachrispy said:

I had these left over from my 2017 GT PP. They fit the GT350. Spendy for what they are, but they are so easy-peasy to install and remove, and provide significantly more protection than the foam rock blockers:

https://www.americanmuscle.com/splashguard-front-set-2015.html

I lube them with some detail spray when I install them, and clean the rubber pinch bits when I remove them to wash the car.

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I have these on my 2015 GT and they work great. I bought this set for the front end of my GT350. https://lmr.com/item/CPC-157363/mustang-gt350-front-rock-guard-kit-cpc-16-17. I tried the rock blockers and didn't like them so tried these and am happy with they way they look and work.

I too have the foam blockers and last time I detailed my ride, I left them off to dry and forgot to reinstall for a couple of days...had pebbles and dirt there as the tires are sticky and will pull all the gravel up...cheap paint protection in my book!! Speaking of which, if you haven't yet done so, next time you're going to wash the car, sneak under the rear and check out all the collected pebbles inside the rear belly pan...just by banging on the underside of the pan, quite a bit of dirt/pebbles came falling down. I always rinse this area now (including the complete underside of the rear diffuser) out when detailing the car...

I ordered my foam inserts last week. Seemed like a good idea.

Love the Rock Blockers. Best first mod to do with these cars.

MyFirstFord said:

Love the Rock Blockers. Best first mod to do with these cars.

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I actually agree completely. It just makes sense.

I was thinking of installing the actual rock guards (small flares) on the front from ZL1addons. Others make very similar options.
https://zl1addons.com/collections/ford-mustang-rock-guards/products/mustang-gt350-deluxe

ringmaster said:

I have these on my 2015 GT and they work great. I bought this set for the front end of my GT350. https://lmr.com/item/CPC-157363/mustang-gt350-front-rock-guard-kit-cpc-16-17. I tried the rock blockers and didn't like them so tried these and am happy with they way they look and work.

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Yea these! another great option. How do they look against the factory plastic? do the match the ones on the rear of the car?

Like mine, they do the job