50 or 70 series Flowmaster
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Junior User
Joined: Feb 2003
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From: Saugus, CA.
50 or 70 series Flowmaster
I was wondering about which will be better for my truck. 06 F150 screw 6.5 be 2wd. I just had 20's put on and they look great. I have done a search which raised a couple ?'s. I have the 70 series on my 03 Expy which sounds great but there is a slight drone at cruising speed (65 to 75 mph). I live with it. Will I get the some drone on this truck? Will either series produce a drone? The Expy has a 5.4 as does this one. I also read that depending on what tip is used it can play a role in the noise. I think the sound will be great with whatever I use. I don't have a CAI just the basic OEM. So what will be better, the 50 or the 70? I like Flowmaster sound so lets go with them for now. Thanks for help. Bluefire
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I have a 50 series and there is no drone, I also have a K&N CAI.
Can't speak for the 70, but I considered the 40 and it was too loud for my tastes.
I sometimes wish it was a little louder, but it is nice when you get on it.
I had my pipe turned down after the muffler, I don't really like the look of the pipe turned behind the wheel...I know a buddy of mine had the 50 series put on the same truck with the stock tip remaining and it sounds no different.
Can't speak for the 70, but I considered the 40 and it was too loud for my tastes.
I sometimes wish it was a little louder, but it is nice when you get on it.
I had my pipe turned down after the muffler, I don't really like the look of the pipe turned behind the wheel...I know a buddy of mine had the 50 series put on the same truck with the stock tip remaining and it sounds no different.
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Joined: Dec 2005
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I have the 50 and love it. Like mcrensha mentioned, I didnt want the 40 either because I didnt want it to be too loud. The 50 is a nice compromise between a deep, throaty sound and a super loud exhaust. If I want loud ill drive the mustang, for a daily driver I just wanted it to sound good.
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Junior User
Joined: Feb 2003
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From: Saugus, CA.
That sounds good. I guess the 50 is the way to go. Is there a fix for the drone or no. Being this is my daily driver, I would hate to get the drone again in this vehicle. Thanks guys.
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Joined: Oct 2006
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From: Lubbock, TX
I have the FM 70 on mine and absolutely love it. I previously had the FM 50 on a JEep Wrangler and there was noticable drone at highway speed, but probably because it was a small Jeep.
I got the 70, a Volant CAI and the Edge. The Volant makes more noise than my muffler did/does.
I got the 70, a Volant CAI and the Edge. The Volant makes more noise than my muffler did/does.
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Fleet Mechanic
Joined: Nov 2004
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From: Pittsburgh, PA
I had a 50 series on a 4.0L V6 and it droned.
you could always have the shop add a resonator in front of the muffler to reduce the drone/noise. Most resonators look like a cherry bomb or glasspack muffler.
you could always have the shop add a resonator in front of the muffler to reduce the drone/noise. Most resonators look like a cherry bomb or glasspack muffler.
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From: North Carolina
You cannot compare a V6 to a V8 when it comes to exhaust. IMHO it doesn't matter what exhaust you put on a V6..... it will still sound like crap! The 50 on the F150 doesn't drone at all. If you put a 70 on it, you might as well leave the stock exhaust on it.
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From: North Carolina
Yes, The resonator will take away from the exhaust note. I tow regularly with my truck. It runs right in the typical "drone zone" of 2100-2200 RPM's while towing. There is NO drone at these RPM's. This truck is also my daily driver. I am running a 50 series SUV Flowmaster. 3"in 2 21/2" out. I tow with OD off and love the way it performs and sounds. Nice mellow rumble but not aggrevating in the cab like the 40 was.
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I've had 40 series Flowmaster (cat back) on several trucks. The last was a Dakota quadcab ... the system was louder for some reason in the cab than it is on the '07 Screw I now have. Different insulation? Dunno.
I don't think the 40 series with one in/two out is too loud either. It could be a matter of taste, tho. I like some rumble with a V8 and the Flowmaster does it for me. There is no resonance in the cabin at any speed.
I have them mounted so they exit straight out the rear of the truck (like the OEM) and extend about 3 inches past the bumper. The tips are 3.5 inch slash cut SS deals. Perhaps all this helps keep the drone some others are having from what I see in my truck.
Hope this helps.
BAGGER
I don't think the 40 series with one in/two out is too loud either. It could be a matter of taste, tho. I like some rumble with a V8 and the Flowmaster does it for me. There is no resonance in the cabin at any speed.
I have them mounted so they exit straight out the rear of the truck (like the OEM) and extend about 3 inches past the bumper. The tips are 3.5 inch slash cut SS deals. Perhaps all this helps keep the drone some others are having from what I see in my truck.
Hope this helps.
BAGGER
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Joined: Jun 2003
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From: San Jose, CA
I would go with a 24 inch Magnaflow. It will be the deepest sounding of all the mufflers mentioned, with a nice mellow growl. NO drone on the highway. My 18" is very loud when I'm on it but when I'm cruising on the highway it's dead silent. I believe the baffle design of the Flowmaster (besides being inferior performance-wise) generates a lot of drone.
