Muffler Question looking for Patrick G.
#1
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
First, I'm not knocking anyone else's response or opinion so please cime in.
I just bought a full Kooks long tube/catted x-pipe. I'm having a hard time deciding on mufflers. I am anticipating this to be loud. I just don't want the mufflers to make it any louder.
I'm asking Patrick to chime in because he will be tuning it in the near future. How much if any HP will I be leaving on the table with the stock GT mufflers
I just bought a full Kooks long tube/catted x-pipe. I'm having a hard time deciding on mufflers. I am anticipating this to be loud. I just don't want the mufflers to make it any louder.
I'm asking Patrick to chime in because he will be tuning it in the near future. How much if any HP will I be leaving on the table with the stock GT mufflers
#2
8 Second Club
iTrader: (13)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Any other mods? I believe its only about 5hp on a bolt on car... but I believe Pat found it to be closer to 10-15hp on a cam car. Actually think it was 14hp on his personal G8.
Either way stock mufflers quiet down Kooks just fine... sounds so much better with real mufflers though.
Either way stock mufflers quiet down Kooks just fine... sounds so much better with real mufflers though.
#4
11 Second Club
iTrader: (2)
Join Date: May 2009
Location: Oxford,Pa
Posts: 457
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Any other mods? I believe its only about 5hp on a bolt on car... but I believe Pat found it to be closer to 10-15hp on a cam car. Actually think it was 14hp on his personal G8.
Either way stock mufflers quiet down Kooks just fine... sounds so much better with real mufflers though.
Either way stock mufflers quiet down Kooks just fine... sounds so much better with real mufflers though.
#5
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Thanks for the input guys.
Yes for the very long time being it is just a bolt on car. OTR CAI and soon to be exhaust.
Right now I'm leaning toward Magnaflow. I think Solo's would be too loud and I'm just not feeling Spintech/Flowmaster. SLP could be an option.
I really am trying to avoid having the car sound louder than it's actually moving if that makes any sense. Thanks...
Yes for the very long time being it is just a bolt on car. OTR CAI and soon to be exhaust.
Right now I'm leaning toward Magnaflow. I think Solo's would be too loud and I'm just not feeling Spintech/Flowmaster. SLP could be an option.
I really am trying to avoid having the car sound louder than it's actually moving if that makes any sense. Thanks...
#6
LS1 Tech Administrator
iTrader: (14)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
You'll only lose 5rwhp with stock mufflers on a bolt-on car making 360-380rwhp. Personally I would keep the stock mufflers and use washers if it's not loud enough. I'd stay away from the Magnadrone mufflers. You will hate the drone from 1500-1800 rpm. Ask me how I know.
__________________
![](https://ls1tech.com/forums/signaturepics/sigpic210_1.gif)
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
![](https://ls1tech.com/forums/signaturepics/sigpic210_1.gif)
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
#7
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
You'll only lose 5rwhp with stock mufflers on a bolt-on car making 360-380rwhp. Personally I would keep the stock mufflers and use washers if it's not loud enough. I'd stay away from the Magnadrone mufflers. You will hate the drone from 1500-1800 rpm. Ask me how I know.
![Nod](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_nod.gif)
Quick question for Patrick. Do you do Saturday appointments for tuning??
Trending Topics
#8
8 Second Club
iTrader: (13)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
You'll only lose 5rwhp with stock mufflers on a bolt-on car making 360-380rwhp. Personally I would keep the stock mufflers and use washers if it's not loud enough. I'd stay away from the Magnadrone mufflers. You will hate the drone from 1500-1800 rpm. Ask me how I know.
#9
Teching In
iTrader: (2)
Join Date: Apr 2009
Location: Knoxville, TN
Posts: 2
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Thanks for the input guys.
Yes for the very long time being it is just a bolt on car. OTR CAI and soon to be exhaust.
Right now I'm leaning toward Magnaflow. I think Solo's would be too loud and I'm just not feeling Spintech/Flowmaster. SLP could be an option.
I really am trying to avoid having the car sound louder than it's actually moving if that makes any sense. Thanks...
Yes for the very long time being it is just a bolt on car. OTR CAI and soon to be exhaust.
Right now I'm leaning toward Magnaflow. I think Solo's would be too loud and I'm just not feeling Spintech/Flowmaster. SLP could be an option.
I really am trying to avoid having the car sound louder than it's actually moving if that makes any sense. Thanks...
#10
LS1 Tech Administrator
iTrader: (14)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Yes, I tune on Saturdays and Sundays by appointment.
__________________
![](https://ls1tech.com/forums/signaturepics/sigpic210_1.gif)
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
![](https://ls1tech.com/forums/signaturepics/sigpic210_1.gif)
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
#11
12 Second Club
Join Date: Jul 2006
Location: Goldsboro, NC
Posts: 372
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
I ran Kook 1 7/8 with their catted x-pipe for about 2 years before doing an aftermarket axle back. Finally pulled the trigger on some Solo's earlier this year and yes they are loud with the rest of the exhaust, but man I love them. I've not had one complaint on how the car sounds with them either.
Tate
Tate
#14
#15
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Thanks that's good to know about the SLP's. Patrick didn't seem to care for the Magnaflow and the SLP's were my second choice.
#17
TECH Enthusiast
iTrader: (7)
Join Date: Oct 2006
Location: Chesterfield,Va
Posts: 707
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
I had this setup previously. It is definitely louder and better sounding than the GT mufflers but was too raspy for me. SLP powerflows are deeper sounding but still not very loud and arent raspy at all. Even in my cammed car I can talk on the phone or carry on a conversation without any unwanted noise from the mufflers.
#19
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
I've had the same set up you're about to since December. They are almost a little too quiet, but I half think I feel that way because it's the summer months and everyone else has their loud cars out. I'm going to try the washer mod and see if I like it or not, but I'd MUCH prefer too quiet over any drone or even slightly too loud. This is my DD and I have no interest in being annoyed while driving around.
I will be going with a Livernois cam around the new year, so this exact topic has been on my mind lately.
However, this video from Livernois shows a car with otherwise identical mods to you and I, with the addition of a Livernois cam and a valve job. The exhaust is all relative through computer speakers and whatever camera they used to tape it, but they show his dyno numbers at the beginning. 433hp with the factory mufflers. That's right on par with everyone else with similar mods, and I don't think he would've been in the 445-450hp range with other mufflers. Just my $.02.
http://youtu.be/ERglNwq297I
I will be going with a Livernois cam around the new year, so this exact topic has been on my mind lately.
However, this video from Livernois shows a car with otherwise identical mods to you and I, with the addition of a Livernois cam and a valve job. The exhaust is all relative through computer speakers and whatever camera they used to tape it, but they show his dyno numbers at the beginning. 433hp with the factory mufflers. That's right on par with everyone else with similar mods, and I don't think he would've been in the 445-450hp range with other mufflers. Just my $.02.
http://youtu.be/ERglNwq297I
#20
TECH Enthusiast
iTrader: (7)
Join Date: Oct 2006
Location: Chesterfield,Va
Posts: 707
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
The powerflows are heavier than some aftermarket mufflers but they are probably still half the weight of the stock mufflers. Im sure they save at least 30lbs total over stock.