MBRP Exhaust

[Gtecko]

OCC, JB4, and intake
The mechanic installed the tips at the same time he installed the exhaust. The car seat literally vibrates I'm at a stoplight.
Thanks, I don't know why but it didn't occur to me until you guys said it.
I will be bringing it in next week and have them look at it.

I would say that the clamps are not tork properly ... if you never had issue before and now you have vibration, there is something loose or not sitting properly. The clamps have an odd shape BUT have flat part to them, they need to sit properly and you can tork them very very well.
Could be your tips not tight up too ... something is loose my friend

 

[HerbieTheCar]

Yeah that is totally not normal. Once they have it up on the lift they'll be able to pinpoint what is touching and causing the vibration.

Thanks for your reply!

I would say that the clamps are not tork properly ... if you never had issue before and now you have vibration, there is something loose or not sitting properly. The clamps have an odd shape BUT have flat part to them, they need to sit properly and you can tork them very very well.
Could be your tips not tight up too ... something is loose my friend

I will bring this up with the mechanic. Thank you!

 

[NismoDPB]

Thanks for your reply!

I will bring this up with the mechanic. Thank you!

I could see the passenger seat shaking even stock. I just dont think you noticed it before. I dont think it's a result of the system. Unless you are hearing a metal on metal rattle or a tinny sound I'm going to guess your fitment is just fine.

No matter what tips you use, you are going to get drone. The exhaust system is allowing more airflow and hence more noise. The acoustics of the vehicle have an intrinsic resonance around those low frequencies. The only way you are getting around that is with a bi-modal system or sound insulation in the hatch area.

I agree with you that it doesnt sound all that great inside the cabin on those low RPMs, it does sound like it might be "ricey" but I assure you if you go into a parking garage though you will find that outside the car it has a nice low snarl that sounds pleasing.

 

[SKStinger]

I could see the passenger seat shaking even stock. I just dont think you noticed it before. I dont think it's a result of the system. Unless you are hearing a metal on metal rattle or a tinny sound I'm going to guess your fitment is just fine.

No matter what tips you use, you are going to get drone. The exhaust system is allowing more airflow and hence more noise. The acoustics of the vehicle have an intrinsic resonance around those low frequencies. The only way you are getting around that is with a bi-modal system or sound insulation in the hatch area.

I agree with you that it doesnt sound all that great inside the cabin on those low RPMs, it does sound like it might be "ricey" but I assure you if you go into a parking garage though you will find that outside the car it has a nice low snarl that sounds pleasing.

That also doesn't sound normal. I know other members have commented that they felt the 2018 is louder in cabin than the 2019. Perhaps that's why I don't experience what you've described? I don't have drone or vibration in the cabin. My seat's don't shake. I went from stock, to stock catback + SSR midpipes, to MBRP + SSR midpipes + tips and at each change I can't say that there is/was a noticeable drone.

Drone being defined as a resonance or annoying low pitched hum that exists at cruising speed.

With the stereo off at highway speed the catback is only slightly more noticeable than the stock exhaust sounded with the midpipes. Barely noticeable. If I turn the audio volume up to 2 or 3 I can't hear the exhaust at all.

It is noticeably louder when accelerating but that's welcome!

 

[NismoDPB]

That also doesn't sound normal. I know other members have commented that they felt the 2018 is louder in cabin than the 2019. Perhaps that's why I don't experience what you've described? I don't have drone or vibration in the cabin. My seat's don't shake. I went from stock, to stock catback + SSR midpipes, to MBRP + SSR midpipes + tips and at each change I can't say that there is/was a noticeable drone.

Drone being defined as a resonance or annoying low pitched hum that exists at cruising speed.

With the stereo off at highway speed the catback is only slightly more noticeable than the stock exhaust sounded with the midpipes. Barely noticeable. If I turn the audio volume up to 2 or 3 I can't hear the exhaust at all.

It is noticeably louder when accelerating but that's welcome!

I would guess you just have a higher tolerance for it then. We can all agree that the exhaust note is louder. The thing with aftermarket exhausts (mostly because of their intended purposes) is the fact that the low pitch wavelengths will extend beyond the boundary of the muffler, and whatever sound mitigation is being used in said muffler. That's usually why drone occurs inside the cabin, more so in hatchbacks.

So while you may not categorize it as annoying or drone, that situation of low RPM, high load driving is what I find to be the loudest inside the cabin. I think how that loud noise is perceived is entirely up to the driver and what they find offensive.

Drone being defined as a resonance or annoying low pitched hum that exists at cruising speed.

I wanted to come back to this. I agree with you if you are basing drone on this definition. At cruising speed it does not drone and is quiet. It's the acceleration at low rpm (cruising RPM) that I would characterize as being droney. It's a temporary state but it is loud inside the car.

It's why I drive less and less in comfort mode. I am usually in sport engine setting around town

 

[SKStinger]

I would guess you just have a higher tolerance for it then. We can all agree that the exhaust note is louder. The thing with aftermarket exhausts (mostly because of their intended purposes) is the fact that the low pitch wavelengths will extend beyond the boundary of the muffler, and whatever sound mitigation is being used in said muffler. That's usually why drone occurs inside the cabin, more so in hatchbacks.

So while you may not categorize it as annoying or drone, that situation of low RPM, high load driving is what I find to be the loudest inside the cabin. I think how that loud noise is perceived is entirely up to the driver and what they find offensive.

That's possible for sure but I definitely don't experience seat vibration or would say that the low RPM/high load driving is any worse. This is also not my first car with an aftermarket exhaust. I've had others where the drone was much more pronounced and you avoided certain rpm ranges.

For me the biggest concern with drone was highway cruising as I won't tolerate drone when cruising as that is what I find most annoying and i'm completely happy with this catback at those speeds.

 

[NismoDPB]

That's possible for sure but I definitely don't experience seat vibration

I think I need to clarify something here because perhaps I misunderstood Herbie. When I was referring to vibration I meant if I looked over at my passenger seat I can see the headrest shaking a little if no one is sitting in the seat, which I would say is pretty normal for any car.

I didn't meant that my drivers seat has a vibration or rumble when I'm sitting in it. My bad.

Yes if he is feeling a vibration so strong that its shaking his driver seat I would agree that's a problem.

 

[SKStinger]

I would guess you just have a higher tolerance for it then. We can all agree that the exhaust note is louder. The thing with aftermarket exhausts (mostly because of their intended purposes) is the fact that the low pitch wavelengths will extend beyond the boundary of the muffler, and whatever sound mitigation is being used in said muffler. That's usually why drone occurs inside the cabin, more so in hatchbacks.

So while you may not categorize it as annoying or drone, that situation of low RPM, high load driving is what I find to be the loudest inside the cabin. I think how that loud noise is perceived is entirely up to the driver and what they find offensive.



I wanted to come back to this. I agree with you if you are basing drone on this definition. At cruising speed it does not drone and is quiet. It's the acceleration at low rpm (cruising RPM) that I would characterize as being droney. It's a temporary state but it is loud inside the car.

It's why I drive less and less in comfort mode. I am usually in sport engine setting around town

That makes sense and is also my experience. Thanks for the added detail/clarity.

 

[TigGTS]

Just installed installed my MBRP exhaust last weekend, and was able to do it mostly myself (with the help of a buddy at the end to lend a hand hooking up the new mufflers) with the rear tires on ramps. Took about 4 hours all together since it was my first time doing an exhaust myself, but its honestly was straight forward really wasnt bad.. even with the limited room under the car. Also got the oval gloss carbon fiber Akrapovic exhaust tips which fit the car/exhaust perfectly and look great! (I staggered them). Loving it so far, with the combination of the K&N intake and this exhaust you definitely feel a slight bump in power which is now accompanied by some fine sounds

Photos aren't the best, since she's pretty dirty but you get the gist!

 

[Matthewsjw3]

Is anyone running deals on the exhaust at the moment? Have the opportunity to upgrade since I was rear ended 2 weeks ago.

 

[noogahz]

Is anyone running deals on the exhaust at the moment? Have the opportunity to upgrade since I was rear end 2 weeks ago.

Check a few pages before this in this thread. There’s a deal for Presidents’ Day from Discount Bandit(?) and I paid like $780 or something for MBRP SS exhaust

(cheaper if u go alum)

 

[Drudge]

I know @K8 Stinger Store has some great sales. I'm waiting for one (hopefully soon) so I can get a Borla & CF Tip combo.

 

[K8 Stinger Store]

I know @K8 Stinger Store has some great sales. I'm waiting for one (hopefully soon) so I can get a Borla & CF Tip combo.

Reach out and let us know and we would be happy to get you setup with a discount!

 

[RickySpanish]

Anyone order from Khartuners on Black Friday or within a few days of that and received their exhaust yet? Emailed them well over a month ago and still haven’t gotten a response from them about an update.

 

[Svet]

I would like to hear how it sounds from inside the cabin. Does anyone have any links to audio/video?

 

[CKeeler]

Anyone order from Khartuners on Black Friday or within a few days of that and received their exhaust yet? Emailed them well over a month ago and still haven’t gotten a response from them about an update.

I did and received mine a few weeks ago. @NICK_KHAR

 

[Aarvix]

One of the things about this exhaust that annoys me is how wobbly it is, primarily due to the lack of a cross brace between the LH & RH pipes (even the OEM system is braced). Even after trimming my bumper a bit, the tips still rattled against the bumper, especially in gear while stopped.

Today I sought to remedy this. Here's more info in case anyone wants to replicate.

I welded some .065 mild steel to a pair of cheap-o exhaust clamps from O'Reilleys, then drilled and bent a piece of 304 bar I had lying around (any steel will work really).




Painted



Installed



The result is far less movement of the tubes and completely eliminated the rattle. Both pipes are rubber mounted, and coupling the tubes won't change that, just be careful that the brace doesn't contact the differential crossmember.

I understand not everyone has a welder, but this should be pretty cheap at an exhaust shop as well. (skip the clamps and weld tabs directly to the pipes, I plan to do this eventually but didn't have any SS wire for my spoolgun)

Unnecessary pic of welder

 

[AdamNZ]

Funny you decided on this solution, as it's exactly what I did too. The movement just seemed like it was asking for trouble, so I put a bar across the pipes to stabilize the mufflers.

 

[xot1]

, especially in gear while stopped.

Exactly!
I fixed it by trimming a bit more and adjusting the rubber hangers.

 

[Aarvix]

Nicely done @AdamNZ your solution is certainly simpler and doesn't risk shifting/loosening. I just wanted to keep it modular (looks like you welded your clamped connections too)