I was wondering which series of flowmaster exhaust I had on my truck. It was already installed when I bought my truck and yesterday I inspected my muffler, but all I saw was some patent #'s. Is there a way to tell what series it is? Thanks in advance.

 

Look on www.flowmastermufflers.com I think they have some dimensions of their mufflers.
You could measure yours and find one that matches.

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1999 F-150 XLT Reg. cab F/S Sport 4x4, Black, 4.6 Auto, Lund Tonneau Cover, 305/70/16 GY MT on 16X8 American Racing Nitro Wheels, Black Westin Nerf bars

 

Thanks Blueoval. I went to the site and found all the measurements for each muffler. I measured mine at 13" long (my muffler that is) so I'm assuming that I have the "40 series". According to their site, the "40 series" has the most aggressive sound to it, which is exactly what I want.

 

I think the 30 series is the most aggressive. They are called the American Thunder series. I have 40's and don't think they are to loud, and the real test is that neither does my wife.


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2000 F-150, XLT SuperCab
4.6 V8, auto.
3.55 Limited Slip Diff.
Towing Package
Stainless ICI nerf bars
K&N Airfilter
Flowmaster 40 Catbck Sys.

 

Actually, the 40 series are the most aggressive, unless you go right for a race car only muffler. "American Thunder" or "Force II" are generic names for flowmaster's exhaust systems kits, and do not directly have much to do with the muffler in the kit, but loudness level outputs. For example, a 50 series SUV-Performance muffler with 2-1/2" outlets are in both the Dodge Ram and F-150 cat-back kits. Since the factory volume level after the cats in the Dodge is very loud, it is louder after the kit install and called American Thunder. At the same location in the Ford, the volume is quieter and is therefore quieter after the kit install and gets the ForceII designation.

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2000 XLT Black Sport, Flareside, 2WD, Ext. Cab, 5.4L Auto. Other factory options: 3.55 LS, Class III tow, 6-way Captains chairs w/CD changer, Remote entry , and Slider window.
Mods: Undercoat, window tint, headlight & tail light covers, removed "Sport" decals, upgraded Triton tailgate emblem, Linex spray-in bedliner, an ARE LSII lid, recessed Blazer reflectors below the bottom tailgate edge (Thanks Captain),and a Flowmaster cat-back exhaust kit.
Wish list: K&N FIPK, Belltech 3/4 drop, Belltech or Helwig sway bars, and a front bumper cover with lights.
Check out more pics at: http://home.columbus.rr.com/selva1/f150.html




[This message has been edited by selva1 (edited 03-12-2000).]

 

TF,

On the end of the flowmaster (usually on the exit end) there should be the part number engraved on the side. After you get the number you can then cross reference it with the web sight. Hope this helps

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The heartbeat stops when LIGHTNING Strikes!!!!

99.5 Red Lightning #1652> born May 27, 1999
1/4 mile w/ only new mufflers 13.594 @ 101.98
2 Chamber Flowmasters
8" Bazooka Tubes
6.5 Diamond fronts
5x7 Kenwood Excelon rears
Phoenix Gold Amp
Dyna Mat Cab
Superchip
Downs Filter
Red Rhino Liner
JBA Jet Hot Headers
BFGoodrich Drag Radials

1996 SVT MYSTIC Cobra #177 of 1999
2 Chamber Flowmasters

1999 Harley Road King Classic
Too much to list

2000 Mercedes ML430 SUV

2000 SVT MYSTIC Gold Cobra Coupe 1 of 800 (deposit)

ROB
Bel Air, Maryland