To those of you with an Ex 7.3 with a 4" exhaust- Do you have a problem with drone in the cab? Do you run with or without a muffler or "resonator"? I am wanting to upgrade to a full 4" exhaust and have heard that in an Ex, sometimes you get some drone and I dont want that. Just wondering what yall think, any input appreciated, thanks

 

I would like to help,but the 35" nittos drown out any drone I would have. If I roll the pass rear window down I can hear the exhaust real good,but otherwise I can't really hear it.

 

I think the "drone" might be on the intake side? At least it was for me when I did the 6637 mod...

 

No exhaust drone for me.

 

No issues for Chelseas X...

 

It's possible that reported drone on the X has something to do with where the exhaust exit is.

Different vehicle but similar body style- when I installed a larger exhaust on our turbo diesel station wagon the exhaust exited under the body like stock and had drone, especially bad around 70-75 mph. Then I redid it and had the exit stick out past the body. Absolutely no drone with the latter setup.

I believe if the exhaust isn't ejected sufficiently from under it will resonate and create drone. Just my opinion based on experience with the wagon.

 

No drone from the 5" on mine....quiet as stock.

 

Are you running any kind of muffler?

 

Running a muffler?

 

Using a muffler?

 

Quiet as stock?? Wow.

 

Yup, the standard MBRP 4"

 

I'm using a Walker BTM with a FTE resonator in front of it. It really is as quiet as stock. My wife insisted....she doesn't like the 6" tip on it though. She says it looks redneck.

 

MBRP 4" w/muffler here. I miss how quiet it was w/stock exhaust... It's not the deafening drone my '99 454cid Suburban had with basically straight pipes, but its not stock-quiet either. Overall, the stock exhaust with muffler delete on my F350 is quieter - inside and outside the truck. I actually prefer the tone of the straight-piped 3.5" exhaust!

With 100% stock exhaust and the tunes I was running on the X, I had NO PROBLEM with EGT's even towing my 12k lb Toy Hauler in the heat of summer thru the Smokey Mountains. The ONLY reason I went to the 4" system is I have bigger plans for the X and stock won't be an option. There is no MPG or SOTP's power increase, so as long as you have good tuning - I cannot see WHY you'd give up a nice, quiet luxury ride for a noisy 4" exhaust. (I think thats what old people would say... )

All that said, when that 4" MBRP sees 30psi of boost and 2500rpm's - it makes beautiful music!! And I am certain it took 1000's of miles of driving with no radio listening to that song before my fuel economy and tire wear got back to normal - but since I drive ALOT and tow about 50% of that, I miss the quiet interior the stock system provided. I have added dynomat stuff to the floor and will be doing doors and roof, but do not expect it to be stock-quiet ever again...

 

X2 here