OP
OP
V8der
Well-Known Member
- Thread starter
- #46
Ok here's a quick write up on the rear valance install for the Mach 1/GT500. As I mentioned above I was the first to figure this one out and do it as well early last year off of the 500 and since its the same on the Mach 1 I'll ad this to the thread.
So the big reason why everyone thought the wouldn't work on 18+ cars even thought the bumper looked identical was because the GT500 had a different part number that the GT bumper. So it was figured by most that it would need the whole complete rear bumper and valance to make it work. What I figured out after looking at ALL Data R&R pics and some exploded parts views and the 500 bumper up close was that the only difference between the 2 is the parking sonar sensors. GT500's don't have sonar and so the bumpers don't have the holes for them. Thats the only difference. Besides that and a the crash support isolator being different everything is identical.
Parts wise here is everything needed for the rear valance ( Levitown has them listed also based of the part numbers I initially gave them when I did this swap and their prices are awesome)
Install wise its super straight foward. Rear bumper cover will have to be taken off. Heres the All Data for that:
Next the Rear crash support isolator will need to be modified (or if you want to pay $120 for a GT500/ Mach one it will need to be swapped out)
The isolator will need to have these arms cut off flush with the main body if the isolator. If you have a Dremel or reciprocating saw this can be done on the bumper cover without removing completely. It will just need to be unsecured and drooped away from the bumper on the 3 tabs that hold it. You can leave all the wiring in place for the parking sonar /lights etc except for the back up light wiring that runs across one of the arms.
Next the bumper will have to remove the 6 bolts (3 per side) from both sides of the corners of the bumper, then unlatch the clips that hold the valance to the main bumper. (These are a pain IN the ASS!) go slowly and carefully. I take a plastic trim tool and "gently" bend the bumper part of the tab to make them separate easier.
New 500/Mach valance will go on the same way and basically reverse the steps to secure to the bumper. Back up reverse light is the same on the GT so that will need to be swapped over from old bumper and then use the all data bumper instructions to put the bumper back on the car the way you took it off.
Next is the part I get asked about the most on IG and here. Once the bumper is on the car and it tine to install the rear underbelly aero this can get tricky if you don't know what your looking for.
These brackets ( left side of pic) mount to these circled holes below in the body of the car. If you have active exhaust the wiring harness for that will have some wiring clips using these holes. They will need to be removed and put back in and secured to the bracket itself instead. Next, the middle perch will mount a Xmas tree clip to the valance itself BEFORE you mount the underbelly. The the last big hole (far right on pic) will use the bolt to hold up the underbelly itself. The rest of the rear of the underbelly uses bolts and Xmas tree clips to secure.
On the front of the underbelly , the middle exhaust hangers will need to be removed and replace with these. (you don't need to remove any part of your exhaust to remove and replace these) just simply unbolt and remove. I use a little lube to make them slide off and on easier.
They will slide like the stock GT one. The front of the underbelly will hang on that little tab and then its secured with a bolt.
That pretty much it. very simple mod to do even if you're not mechanically inclined if you just follow the instructions and take you time.
So the big reason why everyone thought the wouldn't work on 18+ cars even thought the bumper looked identical was because the GT500 had a different part number that the GT bumper. So it was figured by most that it would need the whole complete rear bumper and valance to make it work. What I figured out after looking at ALL Data R&R pics and some exploded parts views and the 500 bumper up close was that the only difference between the 2 is the parking sonar sensors. GT500's don't have sonar and so the bumpers don't have the holes for them. Thats the only difference. Besides that and a the crash support isolator being different everything is identical.
Parts wise here is everything needed for the rear valance ( Levitown has them listed also based of the part numbers I initially gave them when I did this swap and their prices are awesome)
- KR3Z-17F828-AA - Rear Diffuser
- KR3Z-6P013-A - Closeout Panel
- FR3Z-17D943-H - Bracket
- FR3Z-17D942-G - Bracket
- (x2) FR3Z-5A242-E - Brackets
- (x2) W711687-S300 - Clips
- (x4) W709990-S439 - U-Nuts
- (x2) W520812-S439 - U-Nuts
- (x2) W714312-S439 - Bolts
- (x4) W712977-S439 - Bolts
- KR3Z-6328371-AA Left Wheel Arch Guard
- KR3Z-6328370-AA Right Wheel Arch Guard
- (x4) W714040S300 Arch Clips
- (x4) W715060S450B Arch Screws
- (x2) W712977-S439 Exh. Hanger Screws
Install wise its super straight foward. Rear bumper cover will have to be taken off. Heres the All Data for that:
Next the Rear crash support isolator will need to be modified (or if you want to pay $120 for a GT500/ Mach one it will need to be swapped out)
The isolator will need to have these arms cut off flush with the main body if the isolator. If you have a Dremel or reciprocating saw this can be done on the bumper cover without removing completely. It will just need to be unsecured and drooped away from the bumper on the 3 tabs that hold it. You can leave all the wiring in place for the parking sonar /lights etc except for the back up light wiring that runs across one of the arms.
Next the bumper will have to remove the 6 bolts (3 per side) from both sides of the corners of the bumper, then unlatch the clips that hold the valance to the main bumper. (These are a pain IN the ASS!) go slowly and carefully. I take a plastic trim tool and "gently" bend the bumper part of the tab to make them separate easier.
New 500/Mach valance will go on the same way and basically reverse the steps to secure to the bumper. Back up reverse light is the same on the GT so that will need to be swapped over from old bumper and then use the all data bumper instructions to put the bumper back on the car the way you took it off.
Next is the part I get asked about the most on IG and here. Once the bumper is on the car and it tine to install the rear underbelly aero this can get tricky if you don't know what your looking for.
These brackets ( left side of pic) mount to these circled holes below in the body of the car. If you have active exhaust the wiring harness for that will have some wiring clips using these holes. They will need to be removed and put back in and secured to the bracket itself instead. Next, the middle perch will mount a Xmas tree clip to the valance itself BEFORE you mount the underbelly. The the last big hole (far right on pic) will use the bolt to hold up the underbelly itself. The rest of the rear of the underbelly uses bolts and Xmas tree clips to secure.
On the front of the underbelly , the middle exhaust hangers will need to be removed and replace with these. (you don't need to remove any part of your exhaust to remove and replace these) just simply unbolt and remove. I use a little lube to make them slide off and on easier.
They will slide like the stock GT one. The front of the underbelly will hang on that little tab and then its secured with a bolt.
That pretty much it. very simple mod to do even if you're not mechanically inclined if you just follow the instructions and take you time.
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