RKP GTS High Wing Mount Set

[Ryan@IND]

BMW's M4 GTS includes an aerodynamics package that reduces lift at high speed, and enables more confident driving on the race track.

Unfortunately, because BMW has to appease the general buying public, and must comply with rear visibility guidelines, the rear wing on the GTS quite literally falls short of it's potential by being positioned quite closely to the trunk surface. By being positioned only 6.5" away from the trunk surface, the GTS wing is exposed to dirty, turbulent flow which does not enable the airfoil to operate as efficiently as possible.

RKP's high mounts for the GTS wing place the wing much higher relative to the M4's roof, exposing the wing to clean, laminar airflow. In doing so, further performance can be extracted from the GTS wing. The RKP mounts are constructed from billet aluminum, and are designed to minimize weight while being a direct fit to the M4 trunk. The mounts are finished in the same grey as the original GTS mounts for a clean look.

[M4_GTS]

To me the oem mounts looks more stable with its wider and bigger base where it meets the trunk. Also there seems to be a machined groove for a rubber o ring for water proofing.

[PNWM3]

OEM mounts just looks so much better. Bevels are better and top of RPK has some strange way they cut the holes too close to the top. Agree that bottom should look more substantial as well. I would not get these for my GTS when it comes in.

[Nate@IND]

Originally Posted by M4_GTS

To me the oem mounts looks more stable with its wider and bigger base where it meets the trunk. Also there seems to be a machined groove for a rubber o ring for water proofing.

The RKP mounts are just as stable as the OEM. Not that I recommend it but you could push the car using the mounts alone. The top washers are moved to the inside of the trunk. We have tested the mounts on the iND M4 using all OEM GTS hardware and there is zero water leaks.

[heckyeahbro69]

I'd have to disagree. The rounded edges on the mounting surface really make it look like the wing would easily bend backwards. The oem mounts have much more marerial on the trailing edge. Combine that with less surface area to spread the load out on the trunk lid and no way to seal it up and you have a part that's sub par compared to oem. I think rkp should go back to the drawing board on this one.

[Russell263]

Originally Posted by heckyeahbro69

I'd have to disagree. The rounded edges on the mounting surface really make it look like the wing would easily bend backwards. The oem mounts have much more marerial on the trailing edge. Combine that with less surface area to spread the load out on the trunk lid and no way to seal it up and you have a part that's sub par compared to oem. I think rkp should go back to the drawing board on this one.

There is no pressure being applied to the trunk lid or edges of the supports. All mounting hardware is located inside the trunk, securely mounting the brackets to the trunk hinges.

If you were relying on the trunk lid alone to support the brackets, I could see your concern, but all of the support is handled from inside the trunk. For water sealing, item 10 is swapped to the inside of the trunk also.

Hope to have mine all set up within a few weeks and will have some more real world feedback.

[heckyeahbro69]

Ah ok I see what you're saying. It just seems to me like the high mounts would want to just bend backwards around the rounded edge, especially at a more agressive wing angle. I guess time will tell when people start hitting the track with them. I'd imagine rkp did extensive testing already so hopefully it's not an issue.

[FC4]

LOL. RKP is just a knockoff shop trying to parade around as a high-end brand.

[nj3110]

Originally Posted by Russell263

There is no pressure being applied to the trunk lid or edges of the supports. All mounting hardware is located inside the trunk, securely mounting the brackets to the trunk hinges.

If you were relying on the trunk lid alone to support the brackets, I could see your concern, but all of the support is handled from inside the trunk. For water sealing, item 10 is swapped to the inside of the trunk also.

Hope to have mine all set up within a few weeks and will have some more real world feedback.

Hey! so can i get a review of how you think the wing is? Have you had any problems with this?

[MasterP]

It's probably fine. Looks just like the M235i racing wing mounts.

[Powerbeast]

One of my personal favorite modifications on the GTS and definitely a must have! Both design and structure are superb in fit and finish.

[jeff@autocouture]

Originally Posted by MasterP

It's probably fine. Looks just like the M235i racing wing mounts.

they are the same

[bmrwrld]

Originally Posted by FC4

LOL. RKP is just a knockoff shop trying to parade around as a high-end brand.

LOL, I agree. I think the initials RK are the first and last name of the dude they get there parts from in Germany and add a P for Parts, then add a additional 5K.

[jpdchicago]

Originally Posted by heckyeahbro69

I'd have to disagree. The rounded edges on the mounting surface really make it look like the wing would easily bend backwards. The oem mounts have much more marerial on the trailing edge. Combine that with less surface area to spread the load out on the trunk lid and no way to seal it up and you have a part that's sub par compared to oem. I think rkp should go back to the drawing board on this one.

I agree for the same reasons. Also higher lever effect on the trunk due to a longer support...

[schnell325]

Originally Posted by Russell263

There is no pressure being applied to the trunk lid or edges of the supports. All mounting hardware is located inside the trunk, securely mounting the brackets to the trunk hinges.

If you were relying on the trunk lid alone to support the brackets, I could see your concern, but all of the support is handled from inside the trunk. For water sealing, item 10 is swapped to the inside of the trunk also.

Hope to have mine all set up within a few weeks and will have some more real world feedback.

Did you ever mount these?

[mrgicm]

That just looks awful

[smh_amg_m4gts]

Any risk of the higher wing putting more pressure on the trunk and causing future damage? I assume BMW tested the current setup rigorously before moving to production...

[Nate@IND]

Originally Posted by smh_amg_m4gts

Any risk of the higher wing putting more pressure on the trunk and causing future damage? I assume BMW tested the current setup rigorously before moving to production...

No risk at all and the mounts use the same hardware that come from BMW M. We are running the RKP mounts on 25+ GTS's.

Originally Posted by Alex@AUTOcouture

they are the same

Not 100% the same since the M235iR uses a larger thread pattern.

[Powerbeast]

Originally Posted by Nate@IND

No risk at all and the mounts use the same hardware that come from BMW M. We are running the RKP mounts on 25+ GTS's.

Not 100% the same since the M235iR uses a larger thread pattern.

Oh I like this.