[Boomer 2019]

The fins on the original fender liners are there for 2 reasons. First, they allow cooling airflow from the radiators to pass through into the fender wells and be dispersed. Secondly, they prevent debris picked up by the tires from being flung into the radiators, damaging their soft fins.

In normal use the amount of "stuff", its size, weight, velocity, and thus impact speed is not enough to damage the fins, and allow "stuff" to get through into the radiators. Up the speed sufficiently (track driving, that would be me), and the "stuff" will break off the fins on impact leaving the radiators exposed to damage. Ask me how I know.

I have had to replace the fender liners 3 times over the years because all but a few of the fins had been broken out, and my radiators were taking a pounding (mostly by tire marbles). Each time I replaced the liner I would scoop out a dozen or more large marbles and broken fins from the shelf below the radiators. Fortunately the radiators were not damaged and I was able to straighten the bent vanes with a knife.

My shop came up with a MacGyver fix that protects the radiators but the fins still get broken out. Not ideal but workable. They placed a wad of plastic filter material between the liner fins and the radiators. The material is kind of like the plastic scrubbies we use on pots, pans, and dishes. I have had my current liners for about 8 months now with only a few fins remaining, but at least my radiators are protected. I do however wonder if some of the airflow through the radiators is being blocked by the "scrubbies". These aluminum plates look like they would allow substantially better airflow and I will be ordering soon.

[SMED]

Just tried putting my 20" winters from my 2023 M2 onto my new 2025 M4 Coupe and it rubbed really bad. Will this Ali Express fender mod work for 275/30/20 Winter Michelins....????

[blackops23]

Originally Posted by SMED

Just tried putting my 20" winters from my 2023 M2 onto my new 2025 M4 Coupe and it rubbed really bad. Will this Ali Express fender mod work for 275/30/20 Winter Michelins....????

It should! Are you lowered? Spacers? I’m lowered with 12mm spacers and no rub with 285/30/20 ps4s

[SMED]

Originally Posted by blackops23

It should! Are you lowered? Spacers? I’m lowered with 12mm spacers and no rub with 285/30/20 ps4s

Good to know. The car is brand new and stock so far other than spacers that I believe are 12mm. I may lower it depending on how long I plan on keeping the vehicle.

[sycd]

For those who had these mesh/plates for a while, how is it working for you?

I'm about to install a set (RKP replacement liners modified with the mesh), and I'm wondering if without the stock angled fins, small debris/pebbles can make it through the mesh and hit the radiator and accumulate in front of the radiator.

Has this been an issue for you? any downside of installing these without the stock fins?

[blackops23]

Originally Posted by sycd

For those who had these mesh/plates for a while, how is it working for you?

I'm about to install a set (RKP replacement liners modified with the mesh), and I'm wondering if without the stock angled fins, small debris/pebbles can make it through the mesh and hit the radiator and accumulate in front of the radiator.

Has this been an issue for you? any downside of installing these without the stock fins?

No issues! working good for me!

[Boomer 2019]

These plates were actually designed to use with spacers. When installing spacers you must cut out the fins in the fender liner. When you do this, all the track debris thrown forward by the tires will impact the radiators unless something (the aluminum plates) are installed to block it. If not using spacers you can leave the fins in place if you chose, but they will break off over time from the pounding they take. The aluminum plates are the best protection for the radiators. Oh, and a dab of loctite on the nuts and bolts wouldn't hurt either.

[DMC M3]

Originally Posted by blackops23

Just installed oiomotors Racing Enhanced Clearance Front Fender Liner Aluminum Plate for for BMW G87 M2 G80 G81 M3 G82 G83 M4
https://a.aliexpress.com/_m0Km2C0

Solid quality for what it is…just a black metal honeycomb style grill that appears to be powder coated black.

Simple install after taking front wheels off all you need is a 10mm socket to remove fender liner bolts, a razor blade to cut out fins, a 7/64” drill bit to match drill holes on plate and fender liner, and a 5.5mm socket (first time I’ve ever used that size I think) to tighten the tiny hardware that came with new plates.

And voila no more rubbing at all. On 20” squared 12mm spacers in front and m perf HAS. (Michelin’s) but doubt it would matter with the amount of clearance this appears to have created.

Was under $120 shipped and arrived in less than 2 weeks.

My tires are rubbing on the ridge to the left of where the plate would go. I don't think this will help me unless the plate itself pulls the wheel liner in a bit. I need about 1/4 inch. Anyone have ideas?

[Schulminator]

You're running 295/30 in front, what wheel size? I have 285/30 on a 20x10 in front and slightly rub with a few vents clipped down.

[Hit_Apex]

Originally Posted by DMC M3

My tires are rubbing on the ridge to the left of where the plate would go. I don't think this will help me unless the plate itself pulls the wheel liner in a bit. I need about 1/4 inch. Anyone have ideas?

You can shave a relief in the rib.

[nbennettksu]

Originally Posted by Boomer 2019

These plates were actually designed to use with spacers. When installing spacers you must cut out the fins in the fender liner. When you do this, all the track debris thrown forward by the tires will impact the radiators unless something (the aluminum plates) are installed to block it. If not using spacers you can leave the fins in place if you chose, but they will break off over time from the pounding they take. The aluminum plates are the best protection for the radiators. Oh, and a dab of loctite on the nuts and bolts wouldn't hurt either.

I just have spacers at the moment and it only rubs in reverse; all fins accounted for. I am assuming that once I install the MP HAS, it will get exponentially worse, is that a safe bet?

[Boomer 2019]

The instructions that come with the plates tells you to cut off the fins in the fender liner when using spacers. Otherwise you will still get rubbing, especially if you increase the tire size toward max. I don't think the addition of the MPHAS kit will make any difference in rubbing because the actual height change is not that great. However, since you are running considerably larger tires and wheels than stock, I guess it's possible. Unless someone else shows up here with the same setup, I guess you are going to have to be a pioneer on this one. Good luck.

[Sp2pilot]

Originally Posted by DMC M3

My tires are rubbing on the ridge to the left of where the plate would go. I don't think this will help me unless the plate itself pulls the wheel liner in a bit. I need about 1/4 inch. Anyone have ideas?

Since you already have slight markings of where it's rubbing, maybe take a heat gun and slightly push those sections of the liner inwards.

[Crazyotter]

If you had 285s up front with stock wheels and it did rub, do you HAVE to modify the fender liner? If you just let it rub would it damage the tire or just cause an annoying sound from time to time? Would the tire eventually rub away at the liner enough to make the rub go away?

[Hit_Apex]

Originally Posted by Crazyotter

If you had 285s up front with stock wheels and it did rub, do you HAVE to modify the fender liner? If you just let it rub would it damage the tire or just cause an annoying sound from time to time? Would the tire eventually rub away at the liner enough to make the rub go away?

Sure. The plastic is no match for the tire. It can be very loud in reverse though.

[Crazyotter]

Originally Posted by Hit_Apex

Sure. The plastic is no match for the tire. It can be very loud in reverse though.

Thanks for the quick response.
I’m all for DIY projects but I watched a YouTube on this mod and looks like a pain in the ass for something that doesn’t absolutely need to happen.

So 285s will DEFINITELY rub though right?

[Hit_Apex]

Originally Posted by Crazyotter

Thanks for the quick response.
I’m all for DIY projects but I watched a YouTube on this mod and looks like a pain in the ass for something that doesn’t absolutely need to happen.

So 285s will DEFINITELY rub though right?

Too many variables. Are you lowered, if so. Hi much? Stock camber? What size spacers? Stock rim width?

I wouldn’t worry about it in 285 since you’re inclined to not deal with this mod. It would probably only rub at full lock mostly backing out of a parking space anyway.

[Crazyotter]

Originally Posted by Hit_Apex

Too many variables. Are you lowered, if so. Hi much? Stock camber? What size spacers? Stock rim width?

I wouldn’t worry about it in 285 since you’re inclined to not deal with this mod. It would probably only rub at full lock mostly backing out of a parking space anyway.

I’m completely stock all around. The stock wheel is 19/9.5
No spacers

[Hit_Apex]

Originally Posted by Crazyotter

I’m completely stock all around. The stock wheel is 19/9.5
No spacers

In that case I would be surprised if you get any rubbing with 285

[Crazyotter]

Originally Posted by Hit_Apex

In that case I would be surprised if you get any rubbing with 285

Awesome thank you