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2012 HF Under-body panels

43K views 59 replies 30 participants last post by  ScottDR 
#1 ·
Part of the HF package includes special tires/wheels and a additional(s) under body panels for better air flow. Does anyone have any info ( part# etc.) on these parts? Will they fit an EX? See insert from HF add.

New to the Civic lineup, the Civic HF takes fuel efficiency to higher levels[.
The Slippery Civic
The new Civic HF has the same smooth, mpg-enhancing shape as all Civics.

The Science of Fuel Saving
The Civic HF also gets the same efficient powerplant as the rest of the lineup, but adds an aerodynamic decklid spoiler and unique alloy wheels with low rolling-resistance tires.

Go Low
To further enhance aerodynamics, the ride of the HF was lowered a bit compared to other Civic models, and special wind-cheating underbody panels were
 
#12 ·
#11 ·
I checked underneath my LX. There seems to be panels underneath the car. I think the main difference between a HF and original sedan, is that they have lighter wheels and a rear spoiler which I think have no purpose in aerodynamics (maybe for looks?). I think even think the wheels are much lighter than the steelies we're running.
 
#22 ·
I have not had the time to look into the clips yet. The panel are still sitting in the box. I need to take a trip to the big city and find a dealer that will help me with this. If any one knows where I can get the clips on line please post it.

Thanks
 
#25 ·
Panels installed.

Finally got the two panels installed yesterday. It very easy if you have a hoist. The rear panel uses 2 existing bumper clips, (3) 8mm? bolt holes with welded nuts already there and (1) 10mm push clips. The front panel uses (2) 10mm push clips and (2) existing 8mm? bolts. I also used (2) large cable ties to hold the panel tighter up against the gas tank brackets. I did not have 10mm push clips so I used bolts and washers. With no problem. So fare things look promising. One highway trip, 60 miles going, 50.6 mpg and 47.8 mpg on the return. My average on the tank so far is 45.4 but I,m still at 3/4 of a tank. My 15 mile trip to work seems to have pick up about 2mpg. Really to early to tell it it really did any thing yet. I will keep you posted.:eusa_dance:
 
#26 ·
Finally got the two panels installed yesterday. It very easy if you have a hoist. The rear panel uses 2 existing bumper clips, (3) 8mm? bolt holes with welded nuts already there and (1) 10mm push clips. The front panel uses (2) 10mm push clips and (2) existing 8mm? bolts. I also used (2) large cable ties to hold the panel tighter up against the gas tank brackets. I did not have 10mm push clips so I used bolts and washers. With no problem. So fare things look promising. One highway trip, 60 miles going, 50.6 mpg and 47.8 mpg on the return. My average on the tank so far is 45.4 but I,m still at 3/4 of a tank. My 15 mile trip to work seems to have pick up about 2mpg. Really to early to tell it it really did any thing yet. I will keep you posted.:eusa_dance:
thats incredible man
 
#27 ·
Part of the HF package includes special tires/wheels and a additional(s) under body panels for better air flow. Does anyone have any info ( part# etc.) on these parts? Will they fit an EX? See insert from HF add.
My father in-law recently bought a CIVIC LX and I'm converting it to match the HF under body. There are two panels missing, one directly under the gas tank, and another under the trunk all the way back to the bumper bottom.
I ordered and installed the panels. They use two different kind of plastic snaps and a few steel bolts.
I noticed that the panel under the gas tank is only attached to the front and the rear ends with no support in the middle, that's because the HF uses different fuel tank support straps with welded brackets (brackets missing on the LX model) for additional support.
I ordered those too and will find out if they are compatible with the LX gas tank which shows up as a different part number than the HF tank.
For the mean time the panel is secured with tie-wraps to make sure it does not flutter or oil can.
 
#29 ·
Thanks gohammer! Please let us know if it works out or not.

and if possible once everything works out. Can you copy and paste us the exact part numbers and qty used in this project?

Kind regards,

Brian
 
#34 ·
These parts are taking ages to get here, ordered November 11 and still not shipped. I'm sure tank straps are not a common part ordered. Here are the HF gas tank straps I ordered but I'm not sure if they are compatible until I can fit them.
17521-TR0-A70BAND, FUEL TANK MOUNTING1$15.75$15.75
17522-TR0-A50PIPE COMP, FUEL TANK MOUNTING1$13.10$13.10

Here are the missing under body panels that are compatible with the LX and EX:
74626-TR2-A00COVER, FUEL TANK (LOWER)$8.75 $8.75
74625-TR7-A00COVER, RR. FLOOR (LOWER)$20.50 $20.50

The picture posted by R90S shows panels that look the same as the HF panels.
 
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