Professor
forum member
My 2009 GT/CS is basically stock except a CAI and a tune. I wanted something deep and old/school (think Bullitt movie) but not raspy. After listening to countless exhaust clips and hearing several in person, I landed on MAC Boom Tubes and installed them.
They look great and sound great. At idle, they sound nasty (I wish the car was half as nasty fast as it sounds). It's a deep burble. There is no drone (that irritating buzzy resonance). I love the old-school muscle car sounds it makes in between shifts. Outside of the car nets smiles and compliments whether at idle or cruising between redlights. I get compliments at car shows and people want to see what is under the hood (ironically ... it's basically stock).
However, just cruising around, anytime the rpms climb above the 2500 mark, it sounds like a NASCAR drive by. Just a mild 3000-4000 rpm shift sounds like I am all over the throttle. Inside the car, it isn't droning, but it is definitely loud. I really wanted to deepen the sound, but I am not looking for negative attention, especially from neighbors and LEO's. I knew it was a muffler-less cat back system, but I thought the resonators would tone things down a bit (like my 03 Marauder).
I love the timbre of the sound, I just need to turn the volume down from 11 down to a reasonable 7 or so both inside and outside. So what are my options? Here is what I am considering:
1) Add a MAC Pro-Chamber clamp on mid-pipe. The reviews online imply that it "mellows" the sound (it basically looks like a mid-mount muffler). I think this will allow me to preserve the timbre of the sound while turning it down a few notches. Am I wrong?
2) Add a Hushmat trunk kit. This won't decrease the negative attention, but it might drop a few decibels out of the interior. I hope.
3) Have a custom muffler welded at the mid pipe. This could reduce the volume. If I am careful not to pick something too restrictive, I don't think it will dramatically affect hp/torque. Do I run the risk of adding drone to the equation?
4) Adding some small resonators on each line.
5) Going back to stock. I hate this option because stock the car sounded like an air pump breathing through a straw.
Anyway ... I am open to suggestions. I did several searches online and on the forum with little help. Thanks in advance!
They look great and sound great. At idle, they sound nasty (I wish the car was half as nasty fast as it sounds). It's a deep burble. There is no drone (that irritating buzzy resonance). I love the old-school muscle car sounds it makes in between shifts. Outside of the car nets smiles and compliments whether at idle or cruising between redlights. I get compliments at car shows and people want to see what is under the hood (ironically ... it's basically stock).
However, just cruising around, anytime the rpms climb above the 2500 mark, it sounds like a NASCAR drive by. Just a mild 3000-4000 rpm shift sounds like I am all over the throttle. Inside the car, it isn't droning, but it is definitely loud. I really wanted to deepen the sound, but I am not looking for negative attention, especially from neighbors and LEO's. I knew it was a muffler-less cat back system, but I thought the resonators would tone things down a bit (like my 03 Marauder).
I love the timbre of the sound, I just need to turn the volume down from 11 down to a reasonable 7 or so both inside and outside. So what are my options? Here is what I am considering:
1) Add a MAC Pro-Chamber clamp on mid-pipe. The reviews online imply that it "mellows" the sound (it basically looks like a mid-mount muffler). I think this will allow me to preserve the timbre of the sound while turning it down a few notches. Am I wrong?
2) Add a Hushmat trunk kit. This won't decrease the negative attention, but it might drop a few decibels out of the interior. I hope.
3) Have a custom muffler welded at the mid pipe. This could reduce the volume. If I am careful not to pick something too restrictive, I don't think it will dramatically affect hp/torque. Do I run the risk of adding drone to the equation?
4) Adding some small resonators on each line.
5) Going back to stock. I hate this option because stock the car sounded like an air pump breathing through a straw.
Anyway ... I am open to suggestions. I did several searches online and on the forum with little help. Thanks in advance!
