I just bought a 2000 F-150 S/C Flairside and wanted to put Flowmaster's on it. My question is how do the 2 chamber 40 series flowmaster sound on the highway? Are they too loud? I do alot of highway driving and want to be able to talk to the person next to me. Or should I go with the 50 series 3 chamber muffler instead.
Are there any performance difference between the two?

Any help would be app.

 

I just put on a Flowmaster 40, dual out the rear and I love the sound. I have a 99 with the 5.4. Sounds and looks great, get a lot of compliments. The sound in the cab is minimal, all you hear is the low rumble but not bad at all for me. For a performance exhaust it is great. My opion is to go with the 40. Hope I helped.

 

Thanks for the info. I am probably going to go with the 40 because I want something that will turn heads. As long as the noise inside the cab is not that bad.

 

I would agree with chevy sucks i have 40's on my 5.4 and they really get peoples attention, they sound great , but their not to loud in the cab.

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1999 F-150 xlt reg.cab short bed,NASCAR truck,black/ 5.4 /3.55 limited slip/class III towing package/in dash cd player and 6 disk cd changer/p275/60r-17 owl/airaid induction/flowmaster 40 series cat back/classic hood scoop/white face gauges/backdraft spoiler/piaa fog lights.

 

triton2 -
HOW LOUD IS LOUD? Your question is hard to answer simply because we are all different. I have a three chamber flowmaster on my truck and I say the same things as the other guys. It sounds great! It has a mellow tone and its not too loud inside the cab.

The owner of the muffler shop I've used for many years suggusted that I NOT use a two chamber muffler. He had installed a number of them and many customers came back stating they were a little louder than they wanted. The day I was there, he only had a two chamber unit so he installed and told me that if I didn't like it, he would switch it the following week. The sound was nice until I reached freeway speed at about 65 MPH with engine revs at 1900-2200. At that point, things got too loud inside the cab for my taste. I went back the following week and got the 3 chamber. Much Better!

Since my experience with the 2 chamber, I've talked to at least two others who said they also found the muffler to be pretty loud beginning at about 2000 RPM. One of these guys drove a Mustang.

It still boils down to One's Opinion. Good luck with whatever choice you make.

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Black '97, SC with 4.6, 3.55 gears, automatic, 2-4 Belltech drop kit, SnugTop fiberglass lid, 3 chamber Flowmaster muffler, billet bumper grill, fog lights, American Racing 17x8 wheels with 275-60 Goodyear Eagle GT II tires.

 

Thanks to all for your replies, but after thinking about it I went ahead and installed the 50 series flowmaster with duals out the back. It sounds great when accelerating but when on the highway it is not disturbing. Also I noticed a big difference in throttle response.

Thanks again

 

fOR ANYONE,
I am ready to replace my Gibson with a flowmaster 50 series,one 21/2 in and 2 2.25 out.I am plannig on having the two pipes come out in front of rear tire. Does anyone think or know if i am going to loose any low end torque?

any help will be appreciated.

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99 xlt sc,4.6 2w.d.,gibson catback,
superchip,
rsx shocks,
hellwig sway bar,
3" front lift,275/70/16 scorpions,
sst soft bed cover.

FUTURE MODS:4.10 GEARS, GORHINO BRUSH GUARD AND HELLA LIGHTS.
From: Los Angeles, CA

 

veloci: I to have asked that same question. I don't remember getting any straight foreward answer. I did have my pipe routed in front of the rear tire. But the original pipe was there too. I do remember noticing when I first installed the flowmaster that the truck seemed to have more "pick-up". And another point to think about is that the Lightings all have their exhaust routed in front of the rear tire too. The only negative about this is the extra work you have to put into keeping the rear wheel clean. I've put extra effort into mine and it still looks great after 3 years.

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97F150 XLT SC 4x4 Flairside 4.6 V8 5sp Dk Toreador Red, 3.55LS
ARE tonneau cover, p255/70rx16 tires (came w/235), Superchip
Pioneer CD w/4 Polk Speakers & Clarion APA5240amp, skid plates
bed liner, side window deflectors, reese hitch, K&N air filter
40s-2chamber Flowmaster, Bosch +4 spark plugs, rustproofing
Better Built Stainless nerf bars

 

does anyone have the exact dimensions on the flowmaster, i want to make sure i get the right one

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97 f150 XL, white, with plain jane look, (going for the street sleeper look)
full airbox mods, K&N
sway bar and 2/4 drop next

 

Buckettruck,
If you go the flowmaster web site you can find all the details and specs on any muffler.

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99 xlt sc,4.6 2w.d.,gibson catback,
superchip,
rsx shocks,
hellwig sway bar,
3" front lift,275/70/16 scorpions,
sst soft bed cover.

FUTURE MODS:4.10 GEARS, GORHINO BRUSH GUARD AND HELLA LIGHTS.
From: Los Angeles, CA

 

Tina,
thank you for the info. I am going to do it and let you know how it turms out.

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99 xlt sc,4.6 2w.d.,gibson catback,
superchip,
rsx shocks,
hellwig sway bar,
3" front lift,275/70/16 scorpions,
sst soft bed cover.

FUTURE MODS:4.10 GEARS, GORHINO BRUSH GUARD AND HELLA LIGHTS.
From: Los Angeles, CA

 

Veloci,

The guy at the muffler shop I went to installed a 3 inch pipe going in and 2 two and a half inch pipes going out with the 50 series muffler. I sounds great and I did not loose any low end torque at all. It actually feels like I gained some and the throttle responce is much much better.
Hope this helps you.

 

I had a 3" Gibson NASCAR-style exhaust on my '97 F-150 5.4L. I just a ton of low-end torque, the trans started shifting funny and the thing was WAY too loud at idle and cruise. I took it off after only a week and put my stock muffler back on! I have 3-chamber Flowmasters on my Mustang and I love them!!!