ISS forged Qes exhaust?
08-07-13, 07:13 AM
#1
Driver School Candidate
Thread Starter
ISS forged Qes exhaust?
What are the pros and cons? Recently purchased a Brand new lexus IS F 2013, and after listening to the ISS Forged Exhaust on the F i fell in love. Will it kill the reliability? Please tell me about your experience with it. Thank you! and also which would you prefer qes or des?
Last edited by JohnathanK; 08-07-13 at 07:16 AM.
08-07-13, 07:48 AM
#2
Driver School Candidate
primary difference between QES and DES is that the QES is more for track performance. It will throw a code in your IS F when installed. The DES is street spec and won't do that.
I have a DES on order now.
I have a DES on order now.
08-07-13, 07:55 AM
#3
The only con of the QES: it's loud!
One of the pros of the QES: it's loud!
An exhaust won't exactly compromise reliability, but this exhaust has caused some interior rattles in-cabin.
The sound, the slight performance increase, the 'real-tip' look as opposed to the oval quad 'fake' exhaust tips...ISS qes is my favorite exhaust for the ISF, hence why I own it.
However, it is rare and has been discontinued.
It will drone, and with headers, it will rasp.
Here's a link to a cold start (this is with sikky headers, but cold starts are loud regardless with the qes):
https://www.facebook.com/photo.php?v...66327701037441
One of the pros of the QES: it's loud!
An exhaust won't exactly compromise reliability, but this exhaust has caused some interior rattles in-cabin.
The sound, the slight performance increase, the 'real-tip' look as opposed to the oval quad 'fake' exhaust tips...ISS qes is my favorite exhaust for the ISF, hence why I own it.
However, it is rare and has been discontinued.
It will drone, and with headers, it will rasp.
Here's a link to a cold start (this is with sikky headers, but cold starts are loud regardless with the qes):
https://www.facebook.com/photo.php?v...66327701037441
08-07-13, 08:01 AM
#4
installation is key.
I can install a track exhaust, a street exhaust, a space travel exhaust...as long as install is clean, no codes will be thrown.
Even my headers didn't throw a code
.....yet
08-07-13, 08:14 AM
#5
Driver School Candidate
My quote came from Dustin at ISS Forged. This is what he told me when I asked him the same question.
08-07-13, 09:23 AM
#7
I've had both and currently have the DES. Like already said it's a noise preference and maybe a little more power that really isn't noticable.
I never threw any codes with either system since they both have O2 bungs and both eliminate the secondary cats. The DES is more liveable day to day. I personally feel like the DES is a more daily driver friendly exhaust as I always felt like I displaced some torque with the QES (never had it dyno'd to prove though).
If you throw a code its because you damaged the o2 or have the wires twisted and there is too much resistence but not because of ISS.
I never threw any codes with either system since they both have O2 bungs and both eliminate the secondary cats. The DES is more liveable day to day. I personally feel like the DES is a more daily driver friendly exhaust as I always felt like I displaced some torque with the QES (never had it dyno'd to prove though).
If you throw a code its because you damaged the o2 or have the wires twisted and there is too much resistence but not because of ISS.
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08-07-13, 11:59 AM
#9
...and many experience problems with air leaks and bad gaskets, because unlike Joe Z...ISS does not really include proper gaskets with their systems, especially off of the headers. Even the best installations can have follow up issues, as the system flexes and heats up and cools down over time. A good installer will fix these issues as they happen post install.
No two car and drivers are alike
Digger08
08-07-13, 02:40 PM
#10
Its a header back....not a CAT back
...and many experience problems with air leaks and bad gaskets, because unlike Joe Z...ISS does not really include proper gaskets with their systems, especially off of the headers. Even the best installations can have follow up issues, as the system flexes and heats up and cools down over time. A good installer will fix these issues as they happen post install.
No two car and drivers are alike
Digger08
...and many experience problems with air leaks and bad gaskets, because unlike Joe Z...ISS does not really include proper gaskets with their systems, especially off of the headers. Even the best installations can have follow up issues, as the system flexes and heats up and cools down over time. A good installer will fix these issues as they happen post install.
No two car and drivers are alike
Digger08
08-08-13, 04:58 AM
#12
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Its a header back....not a CAT back
...and many experience problems with air leaks and bad gaskets, because unlike Joe Z...ISS does not really include proper gaskets with their systems, especially off of the headers. Even the best installations can have follow up issues, as the system flexes and heats up and cools down over time. A good installer will fix these issues as they happen post install.
No two car and drivers are alike
Digger08
...and many experience problems with air leaks and bad gaskets, because unlike Joe Z...ISS does not really include proper gaskets with their systems, especially off of the headers. Even the best installations can have follow up issues, as the system flexes and heats up and cools down over time. A good installer will fix these issues as they happen post install.
No two car and drivers are alike
Digger08
ISS is still making some exhausts, talked to them not to long ago about it.
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