• Sign Up! To view all forums and unlock additional cool features

    Welcome to the #1 Explorer ST Forum and Explorer ST community dedicated to Explorer ST owners and enthusiasts. Register for an account, it's free and it's easy, so don't hesitate to join the Explorer ST Forum today!


Flex Pipe Upgrade

Stinger

Member
Active Duty U.S. Navy
Messages
193
Reactions
76
Points
27
Location
Madison, WI, USA
#1
No more rattle.




Sent from my iPhone using Tapatalk
 

GearHead_1

1000 Post Club
Messages
1,416
Reactions
1,132
Points
262
Location
Utah
Vehicle
Exploder
#2
Those look like very nice ones. In my opinion a better design than the ones Ford chose to use on the Exploder. May I ask how much the flex joints cost by themself?
 

OP
Stinger

Stinger

Member
Active Duty U.S. Navy
Messages
193
Reactions
76
Points
27
Location
Madison, WI, USA
Thread Starter #3
Those look like very nice ones. In my opinion a better design than the ones Ford chose to use on the Exploder. May I ask how much the flex joints cost by themself?
Not sure. It was a cash job. Work order wasn’t detailed.


Sent from my iPhone using Tapatalk
 

Kirk ST

Member
U.S. Army Veteran
Messages
115
Reactions
41
Points
27
Location
Pittsburgh, PA, USA
#4
jealous. I HATE the rattle...especially when a friend says "hey, nice ride" and then I start it up and it sounds like garbage! :)

my dealer said it's a known issue, so I'm just waiting on them to replace it or modify it.
 

Messages
252
Reactions
111
Points
37
Location
New Orleans
#5
jealous. I HATE the rattle...especially when a friend says "hey, nice ride" and then I start it up and it sounds like garbage! :)

my dealer said it's a known issue, so I'm just waiting on them to replace it or modify it.
Do you possibly have any video of what it sounds like when rattling?


Sent from my iPhone using Tapatalk Pro
 

Last edited:

zdubyadubya

Active Member
Messages
813
Reactions
629
Points
232
Location
Utah
Vehicle
2020 ST
#6

Kirk ST

Member
U.S. Army Veteran
Messages
115
Reactions
41
Points
27
Location
Pittsburgh, PA, USA
#7
Do you possibly have any video of what it sounds like when rattling?


Sent from my iPhone using Tapatalk Pro
next time I do a cold start I'll try to remember to make a video. it only rattles for about 10-15seconds.
 

Messages
99
Reactions
47
Points
17
Location
Washington D.C., DC, USA
#8
The rattle is a recall item, I had mine replaced by the dealership.
 

OP
Stinger

Stinger

Member
Active Duty U.S. Navy
Messages
193
Reactions
76
Points
27
Location
Madison, WI, USA
Thread Starter #9
The rattle is a recall item, I had mine replaced by the dealership.
I wonder if they would’ve warrantied mine with an aftermarket exhaust? My guess is no.


Sent from my iPhone using Tapatalk
 

OP
Stinger

Stinger

Member
Active Duty U.S. Navy
Messages
193
Reactions
76
Points
27
Location
Madison, WI, USA
Thread Starter #10
Do you possibly have any video of what it sounds like when rattling?


Sent from my iPhone using Tapatalk Pro
Have someone blip the throttle while you look at the flex joints. It’s very obvious. You’ll see the joints vibrate then hear it rattle like metal on metal.


Sent from my iPhone using Tapatalk
 

Messages
99
Reactions
47
Points
17
Location
Washington D.C., DC, USA
#11
I wonder if they would’ve warrantied mine with an aftermarket exhaust? My guess is no.


Sent from my iPhone using Tapatalk
If you can show that the flex pipe was not impacted by your aftermarket exhaust, they should warranty it.
 

Cdubya

1000 Post Club
Messages
1,442
Reactions
699
Points
262
Location
NE Ohio
Vehicle
2020 Explorer ST
#12
I don't think it's a recall item unless it's leaking. There's a TSB fir the rattle but it doesn't say to replace it, just to put on a clamp on each flex section (doesn't work). I suggested to Ron to get thermal to put out a midpipe that would work for stock exhaust. i would definitely buy one rather than go to an exhaust shop.
 

KegsBdry

Active Member
Messages
926
Reactions
407
Points
182
Location
WashDC
#13
If you can show that the flex pipe was not impacted by your aftermarket exhaust, they should warranty it.
I too am thinking of pointing it out on it's next oil change at the dealership. There's a recall on these vehicles for 'rear view camera blue screen' anyways.

Thanks for the reminder.
 

Messages
72
Reactions
23
Points
7
Location
Detroit, MI, USA
#14
What size did you use for the flex pipe? I thought it was 2-1/4 but when I was about to cut mine off I measured 2-1/8 and I cant find that size anywhere.
 

Cdubya

1000 Post Club
Messages
1,442
Reactions
699
Points
262
Location
NE Ohio
Vehicle
2020 Explorer ST
#15

Ford Boss (above) seems to say they have a new part for the mid pipe and the flex sections are improved. To me they look the same.
 

Messages
335
Reactions
263
Points
67
Location
The midwest
#16
Ford Boss (above) seems to say they have a new part for the mid pipe and the flex sections are improved. To me they look the same.
They are supposedly updated even though the look hasn’t changed. That ST in the video is a real early one with the two-in-to-one resonator, and seems like plenty of the later models with the “revised” exhaust haven’t had problems. My 2/20 build has been just fine too - no rattle.
 

Messages
72
Reactions
23
Points
7
Location
Detroit, MI, USA
#17
They are supposedly updated even though the look hasn’t changed. That ST in the video is a real early one with the two-in-to-one resonator, and seems like plenty of the later models with the “revised” exhaust haven’t had problems. My 2/20 build has been just fine too - no rattle.
My explorer 3/21 with the revised exhaust has had rattle issues. But they appeared after the downpipes so it’s probably self inflicted.
 

Messages
52
Reactions
13
Points
7
Location
Charlotte
Vehicle
2021 Ford Explorer ST
#19
The rattle is a recall item, I had mine replaced by the dealership.
No it’s not. Unfortunately. Dealing with issue right now.
 



Top