anyone running Flowmasters with h-pipe?

Nomadic · Dec 10, 2017

Just picked up a ‘15 GT. Looks to have Flowmaster series 40 Delta flow mufflers and an H pipe (no resonator).

Sounds mean. A “little” loud for my tastes. Maybe a tad bit of drone at lower speeds. Anyone else have this set up?
And would a Flowmaster catback be even louder?

Thanks.

BmacIL · Dec 10, 2017

They're called dronemasters for a reason. Get a different axleback. Corsa touring, AWE, krona, FRPP Touring. No drone with those.

Nomadic · Dec 10, 2017

BmacIL said:
They're called dronemasters for a reason. Get a different axleback. Corsa touring, AWE, krona, FRPP Touring. No drone with those.

Thanks. I might. The Mustang isn’t my DD so I’ll see if it bothers me. It’s actually not too bad. More a bit too loud if anything. But yes Corsa Sport most likely if anything. I think the touring would be too quiet?

BmacIL · Dec 10, 2017

Nomadic said:
Thanks. I might. The Mustang isn’t my DD so I’ll see if it bothers me. It’s actually not too bad. More a bit too loud if anything. But yes Corsa Sport most likely if anything. I think the touring would be too quiet?

With an H-pipe resonator delete like you have, the sport axleback will be as loud as the Xtreme catback. With the touring it will be solidly loud when you get on it, but extremely manageable and zero drone.

Touring + double X-pipe = Sport catback
Sport + double X-pipe = Xtreme catback

WildHorse · Dec 10, 2017

BmacIL said:
They're called dronemasters for a reason.

I have flowmaster 40's on my Silverado. Zero drone.
I'll most likely put them on my GT as well. :cheers:

Nomadic · Dec 10, 2017

BmacIL said:
With an H-pipe resonator delete like you have, the sport axleback will be as loud as the Xtreme catback. With the touring it will be solidly loud when you get on it, but extremely manageable and zero drone.

Touring + double X-pipe = Sport catback
Sport + double X-pipe = Xtreme catback

Ok, these are the Delta flow 40s. No doubt if the original owner left the resonator on, I’d be fine. We’ll see how it goes. I don’t notice much drone.

Thanks again for the feedback, Bmac! Much appreciated! I will get Corsa touring if I end up with the need to go quieter.

WildHorse · Dec 10, 2017

If you buy the corsa I'll buy you axlebacks.

Nomadic · Dec 10, 2017

WildHorse said:
I have flowmaster 40's on my Silverado. Zero drone.
I'll most likely put them on my GT as well. :cheers:

Yes I think the h-pipe is what causes the slight bit of drone along with extra noise.

If I get the Corsa, will hit you up.

BmacIL · Dec 10, 2017

Nomadic said:
Yes I think the h-pipe is what causes the slight bit of drone along with extra noise.

If I get the Corsa, will hit you up.

The H pipe doesn't cause drone. The muffler's design does. The stock resonator would only lessen it.

Nomadic · Dec 10, 2017

BmacIL said:
The H pipe doesn't cause drone. The muffler'a design does. The stock resonator would only lessen it.

Hmmm. Ok. Well then it’s just loud really. Will have to drive car again. Just got it. I really don’t notice any real annoying drone. I think the 40 w/delta flow was designed to get rid of most that.

BmacIL · Dec 10, 2017

Nomadic said:
Hmmm. Ok. Well then it’s just loud really. Will have to drive car again. Just got it. I really don’t notice any real annoying drone. I think the 40 w/delta flow was designed to get rid of most that.

There's nothing inside that muffler that acts as a quarter wave/Helmholtz resonator. You have to have targeted frequency cancelation for the particular car. As mentioned, Corsa, AWE, Krona, Borla/FRPP by Borla, ARH all do this, some more effective than others at limiting interior presence. What you're hearing is cabin boom that's just at the threshold of drone, so it doesn't feel like your head is vibrating but it's only a tiny step below it.

Nomadic · Dec 10, 2017

BmacIL said:
There's nothing inside that muffler that acts as a quarter wave/Helmholtz resonator. You have to have targeted frequency cancelation for the particular car. As mentioned, Corsa, AWE, Krona, Borla/FRPP by Borla, ARH all do this, some more effective than others at limiting interior presence. What you're hearing is cabin boom that's just at the threshold of drone, so it doesn't feel like your head is vibrating but it's only a tiny step below it.

But they have “The “Delta” deflectors generate increased scavenging for better performance and reduced interior sound.“ Lol. I’ll see how it goes. Not a DD. If it bothers me, I’ll naturally gravitate to switching them out and vice versa.

AlmostFamous · Dec 10, 2017

I'm not one of those zero drone fanatics, but personally, flowmasters do not sound good with the Coyote engine. While Flowmasters sound great when paired with the 5.0L (302ci) and all varieties of the 4.6L (SOHC, DOHC, 2V, 3V, 4V), it produces a raspy tinge to the exhaust note throughout the RPM range with the Coyote and the note isn't full sounding. It has a very un-muscle car like sound IMO.

Braski · Dec 10, 2017

AlmostFamous said:
I'm not one of those zero drone fanatic, but personally, flowmasters do not sound good with the Coyote engine. While Flowmasters sound great when paired with the 5.0L (302ci) and all varieties of the 4.6L (SOHC, DOHC, 2V, 3V, 4V), it produces a raspy tinge to the exhaust note throughout the RPM range with the Coyote and the note isn't full sounding. It has a very un-muscle car like sound IMO.

Yup! Nothing sounded better than flowmasters on a 5.0 back in the day. My 95 was a turd but sounded great! :thumbsup:

AlmostFamous · Dec 10, 2017

Braski said:
Yup! Nothing sounded better than flowmasters on a 5.0 back in the day. My 95 was a turd but sounded great!

I agree, nothing sounded better than a O/R H-Pipe and 1 chamber flowmaster with the 5.0L (302ci). I had a 1987 Mustang and that little tin can moved through 1st and 2nd gear, but was hilariously slow after that, especially when compared to modern vehicles. Sounded great though. :thumbsup:

anyone running Flowmasters with h-pipe?

Nomadic

King of Europe

BmacIL

Enginerd

Nomadic

King of Europe

BmacIL

Enginerd

WildHorse

N/A or GO HOME

Nomadic

King of Europe

WildHorse

N/A or GO HOME

Nomadic

King of Europe

BmacIL

Enginerd

Nomadic

King of Europe

BmacIL

Enginerd

Nomadic

King of Europe

AlmostFamous

Well-Known Member

Braski

Well-Known Member

AlmostFamous

Well-Known Member