# Exhaust Question **URL:** \ **Category:** PittSpeed Automotive\ **Created:** [August 12, 2008, 6:15am UTC](https://forums.speedlife.net/t/exhaust-question/198999 "2008-08-12T06:15:23Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![jph102900](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jph102900/32/6049_2.png) [@jph102900](https://forums.speedlife.net/u/jph102900)\ **Post date:** [August 12, 2008, 6:15am UTC](https://forums.speedlife.net/t/exhaust-question/198999/1 "2008-08-12T06:15:23Z")
Got a question on my exhaust for my Mazda3. I picked up a Mazdaspeed3 exhaust from a guy and Jeff installed it this weekend. I like it and I can feel a little more mid range power on the butt-dyno but it is pretty loud and tends to drone. I did some research and it looks like some other people on the mazda forums have replaced one of the cats (the car has 2) with a highflow cat or I can replace one of the resonators with a 6" universal magnaflow muffler. I don’t want the car to be extremely quiet but it does drone some which I don’t like too much. What do you guys think would do the job? I was skeptical about using the highflow cat since I figured that would increase the volume of the exhaust. On a side note, Jackedup probably thinks I am crazy considering how loud his exhaust was on saturday compared to mine 🤣 ---
**Author:** ![SP71Supra](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/sp71supra/32/5955_2.png) [@SP71Supra](https://forums.speedlife.net/u/SP71Supra)\ **Post date:** [August 12, 2008, 6:16am UTC](https://forums.speedlife.net/t/exhaust-question/198999/2 "2008-08-12T06:16:47Z")
I would think that adding the highflow cat would make the car louder… not that I know that for sure, but just assuming. ---
**Author:** ![4doors5gears](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/4doors5gears/32/6006_2.png) [@4doors5gears](https://forums.speedlife.net/u/4doors5gears)\ **Post date:** [August 12, 2008, 6:18am UTC](https://forums.speedlife.net/t/exhaust-question/198999/3 "2008-08-12T06:18:43Z")
Yeah a highflow cat will make it a little louder, but a resonator will probably help with the drone. ---
**Author:** ![jph102900](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jph102900/32/6049_2.png) [@jph102900](https://forums.speedlife.net/u/jph102900)\ **Post date:** [August 12, 2008, 6:18am UTC](https://forums.speedlife.net/t/exhaust-question/198999/4 "2008-08-12T06:18:49Z")
> [@Adult swim 11:30 tonight: the BOONDOCKS](https://forums.speedlife.net/t/adult-swim-11-30-tonight-the-boondocks/37434/10): > > I would think that adding the highflow cat would make the car louder… not that I know that for sure, but just assuming. I was thinking the same thing. That’s why I am leaning towards getting the magnaflow so that it will quiet things down a bit and get rid of some drone. I was also thinking about putting some dynamat under the carpet to supress some of the sound and road noise. ---
**Author:** ![SP71Supra](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/sp71supra/32/5955_2.png) [@SP71Supra](https://forums.speedlife.net/u/SP71Supra)\ **Post date:** [August 12, 2008, 6:20am UTC](https://forums.speedlife.net/t/exhaust-question/198999/5 "2008-08-12T06:20:27Z")
> [@Ricer and bikes on the street (3 vids inside)](https://forums.speedlife.net/t/ricer-and-bikes-on-the-street-3-vids-inside/37410/11): > > I was thinking the same thing. That’s why I am leaning towards getting the magnaflow so that it will quiet things down a bit and get rid of some drone. I was also thinking about putting some dynamat under the carpet to supress some of the sound and road noise. Dynamat will definatly help ---
**Author:** ![EvoCats2011](https://avatars.discourse-cdn.com/v4/letter/e/9f8e36/32.png) [@EvoCats2011](https://forums.speedlife.net/u/EvoCats2011)\ **Post date:** [August 13, 2008, 8:20am UTC](https://forums.speedlife.net/t/exhaust-question/198999/6 "2008-08-13T08:20:35Z")
Are you trying to cut down the sound all around or just inside the car? ---
**Author:** ![jph102900](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jph102900/32/6049_2.png) [@jph102900](https://forums.speedlife.net/u/jph102900)\ **Post date:** [August 13, 2008, 9:12am UTC](https://forums.speedlife.net/t/exhaust-question/198999/7 "2008-08-13T09:12:32Z")
> [@GM takes Toyota sales crown (for now)](https://forums.speedlife.net/t/gm-takes-toyota-sales-crown-for-now/37403/22): > > Are you trying to cut down the sound all around or just inside the car? Mostly just inside the car. I was going to try dynamat under the carpet first. I was just going to pull up the carpet in the footwells for the driver and passenger (not going to take up the center console area or the front seats). Then I will pull up the carpet in the hatch and back seats and dynamat under there. Hopefully that fixes most of it, but if not, I will probably put a magnaflow cylinder muffler in place of one of the resonators. ---
**Author:** ![coondogg](https://avatars.discourse-cdn.com/v4/letter/c/c2a13f/32.png) [@coondogg](https://forums.speedlife.net/u/coondogg)\ **Post date:** [August 13, 2008, 7:24pm UTC](https://forums.speedlife.net/t/exhaust-question/198999/8 "2008-08-13T19:24:21Z")
What a wuss… Your HID’s giving you too much drone too? lol ---
**Author:** ![thejeans](https://avatars.discourse-cdn.com/v4/letter/t/779978/32.png) [@thejeans](https://forums.speedlife.net/u/thejeans)\ **Post date:** [August 21, 2008, 10:37am UTC](https://forums.speedlife.net/t/exhaust-question/198999/9 "2008-08-21T10:37:43Z")
honestly, my drone was pretty bad when i first my CBE on my car… give it a few weeks and the drone will fade out some or you get used to hearing and it doesnt bother you anymore… not sure which one it really is… lol ---
**Author:** ![kilmer420](https://avatars.discourse-cdn.com/v4/letter/k/d6d6ee/32.png) [@kilmer420](https://forums.speedlife.net/u/kilmer420)\ **Post date:** [August 21, 2008, 1:24pm UTC](https://forums.speedlife.net/t/exhaust-question/198999/10 "2008-08-21T13:24:53Z")
no farking way will a cat make the car drone more…it will quiet down the exhaust note and droning, and so will an added resonator… :bigthumb: