Who there .... you can kill drone without a new system. I did it on my 07 5.4 F-150 Super Cab that came with a cat back Flowmaster 40 SI/DO and two welded rear exits.

We found the '07 last Augiust 2009 and instantly fell in love with it and the day we tested it out I told the wife it was too loud, she agreed. The drone was worse at certain speeds / loads. We loved the truck and where the exhaust exits and how it looked, even some of the tone, but that drone was awfull.

Well, we bought the truck. A few days later, I took it to my muffler man and he said he'ld replace it with a Series 50 SUV Flowmaster, for $175. Muffler is over $120 alone. Fair price, I almost did it.

We talked it over though ... my muffler man and I ... and since the 40 and pipes were nearly new, and as I noticed a straight piece of pipe ahead of the muffler 2.5" diameter, 28" long ... I went to auto parts store and picked up a Thrush Glasspack # 24214 , 28" long, bright red, 2.5" ID inlet and outlet, straight thru, louvered core. Picked up a saddle clamp and a short piece of 2.5" tubing. Between the tubing and glasspack, I replaced the 28" straight section with no modification to the original pipes except to drill a spot weld to reuse the rear band clamp ... so I have it if I ever want or need to slip it back in place.

I know that I said 28", but that's what I could see. Match the muffler and pipe assymbly to the pipe after you get the pipe off, it's closer to 30" total length.

In short, I cut a little off one end of the GP to allow for the wide front band clamp, inserted the piece of pipe into the muffler and cut it then so total length was same as the pipe removed, and then I cut and notched the rear end to match and once I had duplicated both ends, simply slipped it in place.

The long 2.5" glasspack with louvered core and packing removed the drone, yet the truck still has a nice tone. Costs was less than $25 ... with a can of high temp silver which I used to touch up and repaint that bright red glass pack.

If I need to do it again next year or two, I will use a stainless glasspack maybe?

Together, a Flowmaster 40 and a long Thrush or Cherrybomb glasspack make up an effective and very pleasant sounding, reasonably efficient muffling device.





I know that I said 28", but that's what I could see. Match the muffler and pipe assymbly to the pipe after you get the pipe off, it's closer to 30" total length.




I sanded and painted it aluminum high heat.