Muffler Question... [Archive] - Hyundai Elantra Forum

: Muffler Question...

08-02-2004, 09:41 AM
For those who have installed a performance muffller (No Catback) i want to know if you have noticed a great change on your Elantra performance? Did this affected your car mileage? And what about the sound? Did you noticed a big change? (Im talking about mulfler WITHOUT exhaust tip resonator)

For now, this mods i put on my car is a CAI (with a AEM bypass valve when im driving in big raining/water conditions), and platinum spark plugs. And i noticed a significant gain (about 5-8hp depending on the weather). So, when my muffller will be installed (thursday!) how much gain do you think i will probably have?

Currently, my CAI is 3" and my exhaust pipes are still stock (1 3/4") and my muffler will be 2". the main reason why i have to stick with this is because my warranty is still on for some engine parts... After that, im planning to change all my exhaut line. Maybe i will stick with a 2" or 2"1/4 with news headers. Unless you guys can give me better advices :rolleyes:


04 elantra cvvt
08-02-2004, 09:44 AM
I installed a Magnaflow Muffler. As far as performance, I would guess about 8-10 hp. And the sound is a very deep growl. It sounds really good. I don't know about Canada, but in the states, a muffler can't void the engine warranty.

08-02-2004, 09:48 AM
Did your muffler growl alot when your engine is on idle? or you start earing the sound when you push on the gaz pedal?

04 elantra cvvt
08-02-2004, 09:52 AM
It is very quiet at idle. You only start to hear it when you give it some gas. The loudes thing at idle is the CAI.

08-02-2004, 11:02 AM
changing your muffler pipes will not affect your warranty because its considered a replacement part...

the only thing that they wont fix under warranty is the second cat if you damage it somehow.. but that doesnt even really matter and your car will pass emissions testing even if (your cat) is gutted or completely removed... :)

08-02-2004, 11:35 AM
Good sound and noticable gains. You will be please!

08-02-2004, 12:53 PM
Magnaflow :iamwithst

08-02-2004, 02:34 PM
Thanks guys :) normally, my car will sound close to this

04 elantra cvvt
08-02-2004, 07:54 PM
A Magnaflow will be slightly less raspy. That doesn't sound bad though.

08-03-2004, 08:44 AM
As far as performance, I would guess about 8-10 hp.

Huh? Not just from a muffler. I maybe barely got 8-10hp from a header, hi flo cat, 2.25pipe and performance muffler combined.

I'd say that maybe it will free up a hp or 2 but mostly it will make it sound fantastic especially if you go with the Magnaflo.

08-03-2004, 09:29 AM
I'd give it more than 2....

08-03-2004, 01:43 PM
giving a muffler more then a 2 hp gain is a lil unrealistic in my mind sorry I have to agree with XDGT03. But if he opened up the piping then I would agree that hes making more then 2 hp considering the only time I would hope for 6-8hp is when I go from the second cat and use 2.25 inch piping to a magnaflow resinator with 2.25 inlet/outlet and a 2.5 inch core back to a single tip Magnaflow Muffler also with a 2.25 inlet and the tip is a 3 inch so its not a total coffee can lol .

08-06-2004, 10:39 AM
ok, my muffler is intalled!

I did feel some gain, now i have better response on high rpm but... Im a bit disapointed with the sound. Actually, my CAI sound louder than my muffer! for now i put only a classic exhaust tips (Sleeper look :tongue: ) but now im planning installed a REAL exhaust tip with a resonator, i want more sound!
Now the only thing i ear is a very low tone between 750-2800 rpms. Normal?

04 elantra cvvt
08-06-2004, 07:02 PM
What kind of muffler is that. Looks like a Flowmaster.

08-06-2004, 07:59 PM
its a dynomax ultraflow

04 elantra cvvt
08-07-2004, 12:39 AM
Ahh... ok. I've never seen one before.