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55 isn't bad considering


Sent from my Autoguide iPhone app
 

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View attachment 2048 View attachment 2049 View attachment 2050 View attachment 2051 View attachment 2052

Got the project finished last week, the gas tank support straps are 100% compatible with the Civic LX and every thing fits perfectly.
This is not my car, before the panels where installed my father in law made a road trip to Michigan driving at 75mph on cruise control most of the time and he claims the car averaged 37 MPG. He doesn't track MPG's so it will be hard to quantify from his experience.
This panels should start to make a difference on anything over 50 MPH. View attachment 2047

Hey GoHammer,

Thank you for all your pictures and your hard work, people will definitely be using this thread to build them a HF. Do you know how many screws from Majestic and the plastic snap fasteners from Napa are needed and what type?

Kind Regards,

Brian
 

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Here is the link to the parts page that has the panels and hardware: Honda Automotive Parts
I don't remember exactly what I ordered for hardware and I no longer have the receipt but I would get 2 ea. of item 25, 2 ea. of item 27, 2 ea. 28, 4 ea. 36, and 2 ea. 37 The different bolts have different grip-lengths, eg. : Some go through more plastic layers than others.

Here are the fuel tank straps if you like a neater installation, without both of this straps the panel under the gas tank will not have adequate support but I'm sure some of you could come up with creative ways to secure that panel anyway: Honda Automotive Parts
You will need items 2 and 3. The bolts for this are already present in your car.

"DON'T FORGET TO USE JACK-STANDS"

I'm adding this because when I attempted to install the panel under the gas tank the fasteners did not line up to the holes on the straps.
The correct way to install these parts is to follow this sequence:
1) Install straps but do not torque large bolts.
2) Install panel with bolts and plastic snaps on to straps.
3) Torque large strap bolts.
4) Re-install heat shield (removed previously for access)
 

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I'm pretty sure the whole civic line up has underbody panels across the board. I'm sure that's the case for the Canadian cars unless the underbody panels are different on the HF. My LX has them and bluetooth is standard on the LX as well.
My lx does not have bluetooth! Im all in on the gas saving things too! I may be looking into this project as well.
 

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Thank you for the help gohammer. One more question before I order the parts. how many bolts should I order for #37?
 

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How many bolts should I order for #37?
Not sure because I didn't keep a tally of all the parts I ordered versus the parts I actually needed, and the car is not mine or in my garage to go check.
I can see that #37 is a plastic snap fastener, the same one that holds the bumper trim panel under the car which you will reuse on both sides to attach the back of the new panel and the bumper trim, looks like there is one needed for the left front corner of the rear panel near the wheel well.
You can order one #37 or go to Napa and show them a sample of one of the fasteners in your car, they have good equivalent fasteners.
If you end up short on any of these plastic fasteners make a quick trip to the autoparts store.
Have fun.
 

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Just ordered all my parts from Majestic Honda; shipping came out to $14.00, not bad considering others charge well over $50. I'll let you guys know how it goes. I'm in process of converting my car into a HF haha. I wonder where I can pick up used Hybrid OEM Honda Rims.
 

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i did this on my manual trans LX sedan, but i can't really judge too well as i didn't have too many miles on it before i added the under body panel. i only went with the rear most panel, not the one under the gas tank. i do know that my average gas mileage is about 30.1 MPG. it would be higher, but about 80% of my driving is my 2 mile commute to and from work that has about 7 traffic lights. as soon as i hit the highway (where this panel really comes into play), my MPG's raise pretty quickly.
 

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great find. so do these fit, theres accommodation for them? i'll be investing in these!
yep, all holes are already there, just need to buy the panel, a couple bolts, and a couple clips. here is what i ordered for just the rear most panel:
74625-TR7-A00 1x COVER, RR. FLOOR (LOWER)
90111-SM4-003 2x BOLT, BUMPER
90149-SA0-003 2x BOLT, BUMPER
91506-S9A-003 2x CLIP B, BUMPER

installation is pretty easy and i was able to do it in about 10-15 minutes. the longest part was jacking the rear end up so i could get a better look at everything. if you want to add the panel under the gas tank, you will have to replace the tank straps which is more $$$ and more time. personally, i don't think the panel under the gas tank will do too much to add to MPG's.
 

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Delsoldon: Where did you end up buying your parts? I ordered mine recently and they wanted $50 for shipping and not the regular $15 they quoted me. :(
 

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Delsoldon: Where did you end up buying your parts? I ordered mine recently and they wanted $50 for shipping and not the regular $15 they quoted me. :(
it will be different depending where they are being shipped from, but i ordered from here: https://www.1hondaparts.com/

it may end up being cheaper for you to order from your local honda dealer. you might not get a discount on the part price (never hurts to ask if they'll match the price), but you will save on shipping.
 

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@ delsolden i would like to know if you noticed any bad side effects of making this mod. i mean logically there should not be any, but i would like to know before jumping in! there should be no warranty issues here right? it is just basically more mudguards (which give better streamline). yes?!
 

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@ delsolden i would like to know if you noticed any bad side effects of making this mod. i mean logically there should not be any, but i would like to know before jumping in! there should be no warranty issues here right? it is just basically more mudguards (which give better streamline). yes?!
i have not noticed any negative side effects. they are OEM honda parts, so they shouldn't affect the warranty at all. if you are worried for whatever reason, it is completely reverse able before you take your car in.
 

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have you checked your car to see if yours have the panels. after looking thru the thread, some cars had the panels, some didn't. my car, '14 EX Sedan has all the panels.....i know because i had to trim them to fit around my hitch.
 

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Hey all, thread revival! Has anyone verified if these panels became OEM for 2015 EX sedans? I don't want to order and find out I already have them! Thanks

Upon further inspection of a 2013 HF vs 2015EX, the part numbers match on the two panels listed early in this thread. Darn. Was hoping for a slightly better edge in my amazing MPG! My CVT gets me 40.9 average US MPG since I've owned it (5.8L/HK for Canadians). That's over the last ~8,000 miles(11,000KM). So far I have just HF wheels and the HF rear lip.
 
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