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it's an acquired taste, this.

while a 928 without spoilers doesn't seem to excite some enthusiasts, to me and those with an eye for clean, uncluttered design, it signifies absolute perfection of the species. the classic, original lines penned by Möbius are devoid of aerodynamic aids for a very good reason. you see, a car with spoilers and flares sends a very powerful message; it suggests that the engine and suspension has outperformed the shape. put another way, the original lines of the car, in this case the 928, now needs help aerodynamically to cope with the increase in performance.

in the case of the 1983-1986 928S with either the M28.19/20 242hp, 263lb-ft torque 4,7 liter 16-valve engine or the M28.43/44 5,0 liter 32-valve lump producing 288hp and 302lb-ft of torque, one could forgo the "suggested" spoilers with a single option; M470.
Dieter Fröhlich's Porsche 911S-T at the 1970 1000km of Nürburgring.
Waldegård 1971 in Sweden piloting his Porsche 911 S-T for the Finnish Racing Team AAW (Antti Aarnio Wihuri).
this is one of those rare moments when a Porsche option has a bit of a double meaning. you see, M470 was originally used from 1969-1970 and also from 1971-1973 as an option for the 911T/E; it was labeled as an "Appearance Group" package which was an upgrade to the 911S specs save for the engine. what M470 gave the T and E version of the 911 were 911S instruments, leather covered steering wheel, wider 911S rubber moldings on the bumpers and below the doors, rubber bumperettes, gold "Porsche" nameplate and model designation, aluminum door sills, chrome rocker panels, and velour carpeting as in the 911S. for 1969, this option gave you the 5,5 x 14 forged alloy Fuchs with 185HR 14 tires, the S alloy brake calipers and vented discs, hydraulic self leveling front suspension, and a 500Hz horn.

M470 for the 911S, however, was a totally different matter; it was considered a "Comfort Group" option; let me explain.
the standard 911S as offered in Germany...totally stripped out of any comforts and ready for the track. this was the S-T version
the inside of the 1970 911S; remember, this was standard!
a "tamed" S with comfort option M470
Piëch couldn't get the 911R homologated with 500 examples like he wanted; only 22 were made, so what Porsche ended up doing instead was apply this thinking to the 1970 911S. there would be three versions of the S offered in Germany; 911S "Komfort E," 911S "Sport-S" and 911S "GT4/S-T." the Germans got their S already stripped down to what was considered R specifications as standard. that meant it had lightweight bumpers, Recaro seats, a stripped down interior, thinner sheet metal with some aluminum and fiberglass mixed in, Plexiglas windows, no glove box door sunvisors, or ashtray, a center fill 110 liter fuel tank, a collapsible space saver spare, and pull straps taking the place of the traditional interior door latches dropping this sportlicht down to 930kg. 

Porsche then went a few steps further distilling this version of the 911S model to what they called the S-T making them even lighter and offering 2,2, 2,3, and 2,4 liter engines. it wasn't necessarily a road ready 911, rather it was more of a "sports purpose" machine that was essentially 90kg away from classifying as a homologated for the Group 4 Special GT class according to FIA. so this racing version of the 911S that took its cue from the '67 911R, was produced between 1970 and 1971 where the quantity was limited to 33 copies. this car pre-dated the RS.

now, since the S came stripped and ready to race as standard in Germany, you could opt for option M470 "Comfort Group" or "Sonderausstattung" (special equipment) package which essentially made the ultra-lightweight S more comfortable by adding all of the elements previously deleted, sort of taming it a bit to be more of a road car. This concept of the stripped down S was abandoned in 1971 as a result of the recession that gripped Germany at the time; the RS would pick up where it left off.
1984-1989 911 Carreras with option M491 "turbo look" coupled with option M470 "front/rear spoiler delete"
911 Carrera coupé with options M491 and M470
the ultimate sex machine, the 1989 911 Speedster widebody, again option M491 paired with M470
the M470 we're interested in surfaced with the 1984-1989 911 3,2 Carreras; Programs E-K. if one needed an example of what semanticists called a pretentious semiotization, fingers would point to the Turbo-look 911 Carrera. a 911 in this guise would be considered an "all show, no go" Porsche since it basically got everything the Turbo had save for the most important thing; the engine. this option gave it the flared fenders, the rear spoiler and chin spoiler, the turbo suspension, turbo 285mm cross-drilled brakes with piston calipers, and of course the turbo's 16 x 8/9 Fuchs. 

there were those, however, who could do without the wings and chin spoilers wanting something a bit more unique, something that wouldn't elicit the potentially embarrassing question of whether or not it was a Turbo; option M470. to me, it's one of the most sexiest of looks a Carrera could have. the reason behind it was that Porsche wanted to lock a market segment of enthusiasts who were having the flares of the Turbo, whether in steel or fiberglass, tacked on by private tuners and backyard hacks alike. they saw how popular such a look was becoming and decided it best to offer those who preferred that option...done correctly at the factory. so, beginning with the E Program 1984 Carrera you could opt for M470 with the M491 Turbo-look as the basis; the option was then re-categorized with code P59 from 1985-87, and P22 for 1988-89. 
naturally, the pendulum swung the other way towards the 928 crowd. because the 928 Normal was no longer offered in the US from model year 1983 on, there were those who couldn't, or wouldn't, have their 928's distinctively pure design ruined by spoilers. that market still had a preference to have their 928 look like the original version first seen in 1978. technically, the 928 offered option M470 (1983) a year before the 911 3,2 Carrera did (1984), nevertheless, the numbers with 928s with this option are fewer and not as commonly seen as is with the 911.

from 1983 until 1986, there were only 208 examples according to the 928 Owner's Club records; the figures presumably apply to the US cars. I know of an '83 S/N: WP0JB0922DS860995 that has this option in its build sheet, but I've never seen any images of it. the only one I've come across was this 1985 33X Prussian Blue 928S. although the body is exactly as the 1978 original, the staggered Gullideckels somehow manages to trick the eye into believing that something doesn't look quite right. I think it much rather see this shape paired with 16" phone dials instead; there's a direct association when seen this way.

beginning with model year 1987, option M470 was discontinued with the 928's new look with the more modern front and rear fascias which quite frankly don't do the original design tucked between them any favors; it killed the look, in my opinion; I can't imagine it faring any better without the spoilers as there'd be nothing to detract the eye from such an unflattering design decision.

the '83-'86 928S was the only 928 with spoilers that blended themselves perfectly to the 928's design...I simply love the way they look. apparently, other enthusiasts shared my thoughts since both the front and rear spoilers were offered as option M473 on pre-1982 versions as early as 1979 when the 1980 928S made its debut.

interestingly, option M470 was also used on 1989-1993 964s and 1994-1998 993s, only this time instead of it being a "front/rear spoiler delete" option, it offered the exact opposite; a "fixed wing" option. since both models were spoiler-less, at least in the rear, until 50mph when the rear spoiler magically raised in position to both create a slight bit of down force and direct cool air into the engine. no spoilers to remove then, may as well give M470 a new assignment.



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