The old ones can be removed from the stock grills but they did not come off easily (or cleanly)
598836
I have a 2013 BMW M5 and I changed the fender grills out for a carbon fiber version which did not come with new M logos. The old ones can be removed from the stock grills but they did not come off easily (or cleanly). These are not exactly like the stock ones but in my opinion are very close (95%) and original ones are not available from the dealer (I checked at my local dealer).
2048116
I purchased this kit because my heat shields had rusted away and I figured this kit was reasonably priced to replace both these and the burners which seemed to have gotten uneven and created hot spots (might just been the lack of deflectors from the rust-thru).

The deflectors are, of course, and easy replacement. The burners however... without trying to find the correct info I tried a couple of logical places where I could disassemble and replace them (lacking any instructions from the replacement company on how to do it), they looked like a simple slide-over fit. Well I was wrong on all counts as to where to disassemble and furthermore the screws on the inside of the grill had all rusted to the point they would only crumble when trying to remove.

Eventually I found this link on the Home Depot site that has a diagram: http://community.homedepot.com/howto/DiscussionDetail/How-to-replace-burners-on-Charnglow-Grill-9065000000008OJ

Evidently you go in from the front and remove everything from the grill knobs inward until you get to the place the burners can be removed. This was too much of an effort for right now (its cold here) so I simply used a wire brush and shopvac on the current burners (and all inside the grill which was gross and rusty) and ensured everything went back in place and looked as if it was burning more evenly. The shopvac should remove any rust particles that may be blocking the burner holes if you really get in there.

Maybe in the spring I'll take it apart fully and test the instructions I posted. Until then my cleanup and partial replacement should improve the performance anyway.

The quality of the replacement parts looks at least as good as originals, the burners are hefty and look well-made. The deflectors are thick, well-coated, and heavy enough that they should not shift much if you move your grill a bit. Worth the price for certain not to burn a good cut of meat... heck, 2-3 grill sessions should cover the cost of this replacement kit! Only minus a star because instructions would have been very helpful.
1706846
I've been going back and forth between getting a new grill and refurbishing my ~2 year-old Brinkmann 810-4580-S.  After failing to find a kit specifically for that model, I decided to go with this one. The crossover tubes and heat tents were consistent with dimensions I thought would work.  Worst case would be that those two parts would fit and the burners wouldn't (I had not disassembled the grill to get the dimensions exact for those), but considering the package price, I was willing to risk it.

The good news is all three of the components fit!  The bad news (and thus the 1-star deduct) was that it took some modification to the parts and the grill itself to get everything installed satisfactorily.

The heat tents fit perfectly, so all good there.  However, the burners and crossover tubes took some modification to get them just right.

The burners: While the length of the burner was fine, the original burners (and their mounting location in the grill) have a bolt-hole that is slightly offset to the left.  The replacement tubes' bolt-hole is offset to the right.  The fix is not as easy as "then just turn the burner over" because the burners' top-side has gas outlets that would be facing downward while grilling if you turn them over, and I did not like that idea.  I got around this by drilling new ~1/4" holes in the grill's mounting location to match the replacement burners' offset.  If you do this, be careful to support the bottom of the mount as you are drilling.  If your grill is like mine, these will be a bit rusty and you could pretty easily snap one off.

The cross-over tubes: Regrettably, I found that the bolt-holes in these did not line up particularly well with the newly-drilled ones (and though I did not test this, I don't think they lined up real well with the originals either).  I got around this pretty easily by using tin snips to "slot" the mounting holes out to each end of the bracket.  This cost me a trip to the local home improvement store, and about another $15 for a set of their snips, but more tools in the tool bag at the end of the day is not a completely bad thing.

This kit's only other notable drawback is that one of the grill's burners is distinctive because it has the ignition attached.  This kit has five "standard" burners, so I ended up leaving the original ignition burner in the grill.  Additionally, you'll want to get new bolts to replace the ones you'll likely drill out in order to get everything apart in the first place.  It just so happens the size you'll need is available in a bagged 5-pack at the local home improvement store (1/4" x 20 x 5/8", I think).

If the manufacturer were to slot the crossover mounting holes, drill two offset holes in the end of each burner, include one with an ignition, and include replacement nuts & bolts, this would be a perfect kit.  As is, it still beats buying a new grill, and the work required to make the kit work is not too bad.
3964532
I like how these look installed. However, the installation process is not easy. Removal of the old grills is difficult and reinsertion of the new grills is ok, but in my case 2 of the clamps (on the passenger side piece) did not seat and after repeated attempts to reinstall, I just left it as is with confidence it will not just fall out -. there is a 3/8"-1/2" protrusion which is unnoticeable to the untrained eye. I have no way of knowing if another manufacturers grills will snap in any easier. If you are comfortable with muscular, finger, forearm shredding auto projects, you will be fine with this installation.

Long term I have found that another "clip" that fastens the grill to that car has given out and now the it protrudes from the front end, I will have to replace them soon.
2131708
Worth the money just not to have to take the old stuff apart.  I did have to use the 7 reamer to open up the tie rod end hole to the proper diameter. Check it before you install it. It is much easier off the car.
3279829
I like the removable grill plates feature, which makes it much easier to clean than the earlier fixed plate model.  However, the heat transfer to the grill plates is slower, so it takes longer to get up to operating temp.
4102199
The original grill grates had little nibs on each end that held them in place on the grill. These don't have them so they side around a bit on the grill. I don't really notice this unless I'm cleaning the grill.
1796018
Expensive, but it's nice to get rid of my old, worn grates.  In my case, the length is just slightly more than needed so they don't sit in place as well as the originals.
1236257
All good except that when cleaning there is hard to get the crumbs and dirt away from the grill plate. You have to turn it upside down to clear the water and cleaning dirt.
2768396
Not super easy to install, but the old ones that came out were covered in leaves and hair and road crust. I am glad I replaced them, heater seems to work a bit better. I took them to a shop for installation and I was told "... there is no cabin filter on this car ... " to which I responded, "Uh, yes there is because I have already removed the old ones." I had to school them on how to install them and where (under the carpet to the right of the gas pedal) and then they were able to get the job done. Nice folks.
1045352
These look like the old ones, but they are really difficult to remove.  They don't pop out when the handle is turned and it really takes a lot of effort to pull them out, not fun when they are full of batter.  I see they have small rings around a recessed groove (like my old ones)that are quite loose.  I'm hoping with use they'll work better.
1878223
These things are awesome! Unfortunately, clean up isn't. They don't get completely cleaned in the dish washer and unless you are  letting your food get cold and cleaning them as soon as they come off the grill it's going to take a bit to clean. Overall, I do like them though and will only use these going forward.
3016402
My only concern is the instructions they a little hard to follow and the pics are to small( or I'm getting Old) a short length of stiff wire and maybe a set of small hands will help greatly. The factory bolt that you remove for the upper mounting bracket is held in by a thin flat washer once you loosen them you have to tap them out from the inside. I did this myself but would advise a helper once you go to mount the grill guard.
206581
The heat spreaders ARE slightly narrower than the OEM ones... but that seems to be a slight advantage.  Because they are at a steeper angle, the grease is less able to stick to them.  Other components seem strong enough.
1851578
The igniter worked well, but the metal housing surrounding the actual igniter did not match my stove, therefore I had to pull it out and insert it into the old housing so that it could be attached to my stove and burner.  The difficulty with this was that the housing had a metal tab that was permanently fixed into the igniter. I was unaware of this, which made removing the igniter more difficult.  In fact, it is impossible to remove the igniter before going into the side of the housing and chipping away at the ceramic material to free the tab. The metal housing also must be pried away from the igniter before removal.
3821960
Just be careful when removing the old one, so as to not damage the ring around the emblem.  Be patient with it because the original emblem may we glued down pretty good; however, if you take your time you should be able to take the old one off without any problem.
205648
I used these to remove and replace ball joints on a 2003 accord. I beat the crap out of these things (combined with a clamp and an impact wrench) and they did not break.

However, I did not find the fit to be perfect and it took hours of frustration to get the job done. Overall, not perfect, but glad I had these when I needed them.