GT500 Rear Diffuser Install Help - Mustang Evolution

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Old 09-06-2016, 06:42 PM   #1
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GT500 Rear Diffuser Install Help

Hi Guys,
Just got my GT500 Rear Diffuser in the mail & to put it bluntly....The instructions Suck!!! Just a few pics & not much instructions at all. It looks like you have to remove the rear Bumper Cover. Anyone know how to remove it ?
Also looks like you have to cut off some of the Bumper Cover & cut 4 slots for mounting. Anyone done this install that can give me some tips on doing it?
Cutting my bumper cover kind of scares me !!!
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Old 09-06-2016, 10:01 PM   #2
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This video should give you what you need! cutting aint to bad



---------- Post added at 10:01 PM ---------- Previous post was at 10:00 PM ----------

This video should give you what you need! cutting aint to bad

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Old 09-07-2016, 04:26 AM   #3
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Thanks !!!!
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Old 09-08-2016, 12:30 AM   #4
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Here are the instructions from Ford.
When you take the bumper off the car and you look on the back there are mold lines that show you exactly where to cut...just take your time. I used an electric hand saw and it worked great, just take your time and follow the lines. I outlined my lines in black as I had a Red Mustang.

http://1.cdn.lib.americanmuscle.com/...99904-cust.pdf
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Old 09-08-2016, 04:15 AM   #5
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Thanks olerodder. Going to pick up a small electric hand saw tomorrow so I can do this over the weekend. Doubt my jigsaw will fit in there.
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Old 09-08-2016, 10:52 AM   #6
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I used a dremel and it worked perfectly
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Old 09-08-2016, 11:49 AM   #7
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I did the Boss GT/CS but same cuts. really not bad. Wish had a dremel but I used a drill bit and a jigsaw
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Old 09-08-2016, 12:43 PM   #8
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Make sure you protect your paint! Overall not that hard, other than your cutting up your car.
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Old 09-08-2016, 01:09 PM   #9
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I used a dremel too as some of the cut is awkward - definitely the hardest part of the deal.
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Old 09-08-2016, 05:21 PM   #10
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I marked the cut line with a white paint pen before cutting. You don't want to get off the line on the wrong side.
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Old 09-08-2016, 05:27 PM   #11
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Thanks for the tips guys. Going to buy a Multi tool to do the cutting.
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Old 09-08-2016, 08:25 PM   #12
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I used aviation tin shears for mine, $10 pack from harbor freight and literally cut the bumper like paper.
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Old 09-09-2016, 01:28 AM   #13
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Hmmm....I have snips !!! Think I'll try that. Should be a much cleaner cut than any type of sawing. Good Idea. Thanks
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