Sponsored

First Look - Lethal Performance 2015 Mustang GT Resonator / Flex Pipe Delete Kit

gzstang

Who's stang? It's gzstang
Joined
Sep 7, 2014
Threads
5
Messages
394
Reaction score
99
Location
Lincoln Nebraska
Vehicle(s)
2015 Mustang GT w/performance pack
Vehicle Showcase
1
would using the h pipe delete kit with an axle back exhaust work? seems like it would be more cost effective.
Yes exactly..this is what I am going to do...personally I think this is better because you are deleting the flex pipe which doesnt happen with most catback kits.
Sponsored

 
OP
OP
LethalPerformance

LethalPerformance

Well-Known Member
Diamond Sponsor
Joined
Sep 5, 2014
Threads
332
Messages
3,272
Reaction score
2,034
Location
Fl
Vehicle(s)
2020 Shelby GT500 CFTP, 2021 Whipple'd F150
Both the X and H sound great...seems like maybe the H is a little louder.
Question: Is there any drone with this setup: either H or X?

With your resonator delete setup could everything that was cutout be put back using the same clamps you supply? Just in case...I would not want to back myself into a corner if I thought it was too loud or something.

Listening to the video they don't seem a whole lot louder...mainly wondering about drone.

Thanks
There's no drone whatsoever with either setup (x or h). If you wanted to switch back to the stock resonator you'd need (2) 2.25" clamps which aren't included.

Let me know if you have any other questions.

Thanks, Jared

would using the h pipe delete kit with an axle back exhaust work? seems like it would be more cost effective.
You can definitely install an axleback with this kit as our res delete kit still uses most of the factory piping from the rear of the resonator to the mufflers.



Car was obviously dynoed with each setup, so what were the numbers?
The car with an intake, tune and the res deletes (x and h versions) made 409rwhp/384rwtq.

Jared
 

anotherneon

Well-Known Member
Joined
Oct 30, 2014
Threads
26
Messages
847
Reaction score
98
Location
Maryland
Vehicle(s)
15' base GT w/3.55s
If I want to get Kooks headers or any other headers would they bolt up to this?
 

anotherneon

Well-Known Member
Joined
Oct 30, 2014
Threads
26
Messages
847
Reaction score
98
Location
Maryland
Vehicle(s)
15' base GT w/3.55s
There's no drone whatsoever with either setup (x or h). If you wanted to switch back to the stock resonator you'd need (2) 2.25" clamps which aren't included.

Let me know if you have any other questions.

Thanks, Jared



You can definitely install an axleback with this kit as our res delete kit still uses most of the factory piping from the rear of the resonator to the mufflers.





The car with an intake, tune and the res deletes (x and h versions) made 409rwhp/384rwtq.

Jared
Any numbers before the exhaust was added? Seems like most people are putting down 415-420 with just a tune.
 
OP
OP
LethalPerformance

LethalPerformance

Well-Known Member
Diamond Sponsor
Joined
Sep 5, 2014
Threads
332
Messages
3,272
Reaction score
2,034
Location
Fl
Vehicle(s)
2020 Shelby GT500 CFTP, 2021 Whipple'd F150
If I want to get Kooks headers or any other headers would they bolt up to this?

Kooks as well as most other longtube header manufacturers require you to use their own shorty midpipe with their headers. So if you went with a set of Kooks headers they will not mate up to this pipe or any other midpipe that mates up to the stock manifolds. You'll need to purchase the matching Kooks midpipe in order for the system to mate with the rest of the stock exhaust.

If you have any other questions please let me know.

Thanks,
Jared
 

Sponsored

OP
OP
LethalPerformance

LethalPerformance

Well-Known Member
Diamond Sponsor
Joined
Sep 5, 2014
Threads
332
Messages
3,272
Reaction score
2,034
Location
Fl
Vehicle(s)
2020 Shelby GT500 CFTP, 2021 Whipple'd F150
Any numbers before the exhaust was added? Seems like most people are putting down 415-420 with just a tune.

We dyno'd the car with the factory resonator, our X and our H resonator deletes and there was no difference in peak power. Only a small gain across the midrange with the H.

Let me know if you have any other questions.

Thanks
 

anotherneon

Well-Known Member
Joined
Oct 30, 2014
Threads
26
Messages
847
Reaction score
98
Location
Maryland
Vehicle(s)
15' base GT w/3.55s
Kooks as well as most other longtube header manufacturers require you to use their own shorty midpipe with their headers. So if you went with a set of Kooks headers they will not mate up to this pipe or any other midpipe that mates up to the stock manifolds. You'll need to purchase the matching Kooks midpipe in order for the system to mate with the rest of the stock exhaust.

If you have any other questions please let me know.

Thanks,
Jared
Yes I totally knew that and I dont know why I asked.:headbonk:

Thank you
 

BC

Well-Known Member
Joined
Dec 7, 2014
Threads
16
Messages
274
Reaction score
65
Location
Santa Cruz, CA
First Name
Bob
Vehicle(s)
2015 Mustang GT w/PP, Guard
There's no drone whatsoever with either setup (x or h). If you wanted to switch back to the stock resonator you'd need (2) 2.25" clamps which aren't included.
Let me know if you have any other questions.
Thanks, Jared
Thanks for the reply! I'm leaning to this instead of axle backs.
I like the idea of not having to ditch a set of perfectly good mufflers to get a decent sound and a little better flow.
BC
 

Melekith

Well-Known Member
Joined
Dec 1, 2014
Threads
6
Messages
215
Reaction score
45
Location
Wisconsin
First Name
Luke
Vehicle(s)
2015 Mustang GT
Sounds great! I'm thinking about snagging the H-pipe version. Has anyone added an axle-back to the resonator delete kit yet? I'm curious as to the overall sound. This seems like a route many people are considering for cost savings.
 

MustangTim

Well-Known Member
Joined
Nov 2, 2014
Threads
1
Messages
50
Reaction score
4
Location
Katy, TX
First Name
Tim
Vehicle(s)
2015 Mustang GT PP Comp Orange
Sounds great! I'm thinking about snagging the H-pipe version. Has anyone added an axle-back to the resonator delete kit yet? I'm curious as to the overall sound. This seems like a route many people are considering for cost savings.
I'll be doing this shortly. I installed the Flowmaster American Thunder axle back and will be installing the H-pipe in the next few days, when time allows. I'll add that video once I do the install. Here the video of just the axle back, which I also purchased from Lethal. Part # is FLO-817710.

[ame="[MEDIA=youtube]PJBImukvuaQ[/MEDIA]"]
 

Sponsored

Ingot2015

Well-Known Member
Joined
Nov 28, 2014
Threads
40
Messages
301
Reaction score
47
Location
CT
First Name
Ron
Vehicle(s)
2015 gt
I'll be doing this shortly. I installed the Flowmaster American Thunder axle back and will be installing the H-pipe in the next few days, when time allows. I'll add that video once I do the install. Here the video of just the axle back, which I also purchased from Lethal. Part # is FLO-817710.

Have you done this yet?. Leaning toward this setup. Wondering how it sounds
 

gsxr1300

Well-Known Member
Joined
Nov 16, 2014
Threads
15
Messages
2,211
Reaction score
521
Location
MA
First Name
Jason
Vehicle(s)
2023 Mach 1 2015 Mustang GT PP (Sold)
Si it looks like you can install the H pipe without cutting the flex pipe off right?

 

MustangTim

Well-Known Member
Joined
Nov 2, 2014
Threads
1
Messages
50
Reaction score
4
Location
Katy, TX
First Name
Tim
Vehicle(s)
2015 Mustang GT PP Comp Orange
That picture is not accurate. The kit is just like the X-pipe kit pictured on their site.
Sponsored

 
 








Top