hey man, sorry I missed this. I have never actually tried one of those second gen spoilers held right up against a first gen bumper but I can tell just by looking at it that it really will not be a good fit at all, and personally I don't think I'd even attempt it, the results will not be good in my opinion and they really will not match up well to each other at all. not saying it can't be done, just saying I wouldn't as I don't think the fit and look is right enough to attempt it
I've been playing with different bumpers and different designs and personally what I'd recommend is exactly what I am doing right now, which is to find a similar size and shape bumper that compliments our body and then cut the 2 bumpers apart and graft them together, using the upper half of the fx bumper combined with the lower half of another. even this will take a ton of work but in the end I think you'd be able to come up with something that fits better than the second gen spoiler would.
so far I've played with a few different ones, I have pics of 1 that I did just to the mock up/test fit stage with a mercedes amg bumper from a new E class combined with the fx upper and it fits well and looks great. only thing is no matter what you do in the end I think you will have to also build custom sideskirts and rear bumper for it to all "fit" together visually. this particular amg bumper can take the new mercedes LED parking lights, as they'll just bolt in but I don't think I'd do that, I'd be more likely to do "custom" grille and light work so it doesn't just look like you slapped a mercedes bumper on an infiniti. in these pics you can also see how much the front bumper will now "drop down" or be lower in the front lip than the stock bumper. this of course can be adjusted in this mock up stage to exactly how low you want it to be too.
this kind of work is far from easy or cheap, but if done well in the end it will wind up being a custom urethane bumper, with all the good stuff that goes with a urethane bumper such as flexibility and being able to absorb small hits and flexing instead of cracking as fiberglass would, but it all comes down to how well it is actually grafted together. if fiberglass or bondo is used then that would kill it, as it will then be very likely to crack and not be as durable as a urethane bumper, but if this is grafted together with the proper flexible materials throughout then the end results can be very good.
here are a few crappy shots just to give you the idea of what I'm talking about
this is just propped in front of an fx for a visual idea of the look....
now keep in mind that this is just one of many many possible candidates for this type of grafting, anything from a ford edge to a mazda can be used, you must look at the general size shape and curve and then consider possible candidates, then rough measure to see if it's feasible and then just go for it, you can never see the actual "fit' untill you start cutting them and fitting them together, but the good news is that you can use a salvaged bumper for this a the donor does not need to be perfect since you're going to be chopping it up anyway. best way is to find a damaged FX bumper for cheap and then find a damaged donor and then just start cutting...
---------- Post added at 06:16 PM ---------- Previous post was at 05:55 PM ----------
also, just to add, you can also think a bit outside the box with this, for example you might find a suitable donor for the rear that actually comes from the front of another car or a rear to work on the front even...in the end you're borrowing the shape and mass from another urethane bumper but the fx bumpers are very weird shape, especially the rear, not many vehicles are that rounded in the back but many are in the front. there are some cadidates for the rear that come from the front of another car but you have to also consider styling and what the end results will actually look like... it's one thing to just "change" the look but it's another to actually "improve" it, you don't want to do custom just for the sake of custom and wind up with something that looks worse than it did stock... the fx is a beautiful vehicle to begin with, improving it without making it look tacky is a challenge and is why I think you can't do just the front alone, it all needs to tie together for an overall look, don't just focus on a bumper, focus on the whole silhouette of the vehicle as a whole and make sure what you're doing is actually going to be an improvement from how it looks stock
