Hi All:
I have a 2001 F150 SuperCrew w/ 5.4 4x4 Lariat. I am going to put Flowmasters on, but I'd like to know if anyone has heard the difference between the FM50 straight and with the Delta Flow ? I want the ESL, but I want to keep the ISL to a minimum.

Thanks,
Les

 

les-maverick
below is spec's on all flowmasters
http://www.flowmastermufflers.com/fm...PerfMuff8.html
another site to explain delta flow here

http://www.flowmastermufflers.com/fm...PerfMuff7.html

to me the deltas models are a little more subdued and may keep low in power better.
hope this helps
im shopping too but think i'll go borla

here is an explanation of diff between reg 50 an delta flow 50


http://www.flowmastermufflers.com/fm...PerfMuff4.html

------------------
2001 F-150 4X4 Supercab
Arizona Beige clearcoat
XLT 139" WB style side
5.4L V8 4-SPD AUTO O/D
3.55 LIMITED SLIP AXLE
6500# GVWR PACKAGE
17" ALUM WHEELS
OFF ROAD 4X4 EQUIP GROUP
TOW GROUP CLASS III
SLIDING REAR WINDOW
FORD BED LINER
FORD BUG SHIELD
FORD STEPS

MODS:
AIRAID FIPK
SUPERCHIP(FLIP CHIP)
ROLL & LOCK TONNEAU

[This message has been edited by Predator1 (edited 03-31-2001).]

 

The Delta's take the drone out.Makes it quieter inside.When I bought my 50 series the guy at the performance shop told me flowmaster only sells the 50 series in delta.Don't know how true that is just what I was told.

------------------
------------------------- 99 SILVER XLT/REG.CAB/4.2/5SPD/3.55/K&N/Flowmaster 50 series Delta Flow/Westin Black Nerfs/SuperChip/Hellwig Rear Swaybar/Energy Suspension Front Swaybar Bushings and Endlinks/Trenz Billet Antenna

 

You might consider a 40 series Delta Flow. It will have nice loud and clear external sound at WOT and solid rumble at idle but fairly quiet levels inside the cab.

I have a 50 series non-DF (SUV series) that came with the FORCE II kit, and there is a bit of interior resonance. Not much but it is there. It is rumbly but not obnoxious. I have talked to people who have done a 3"in/out 40 series DF thru a 3" tail pipe in the stock location and they are very happy.

------------------
Howie's Effie
Amazon Green 2000 F150 XLT 5.4L 4x4 ORP Supercab Flareside
Captains Chairs, Electronic Shift, Rear Slider, Keyless Entry, Cab Steps, 3.55 L/S
Mods: Superchip, WMS Velocity Tube, Flowmaster Force II, Scorpion Spray in Liner, fogs + hibeams (thanks FedExPilot)

 

Hi All:

Thanks for the replies. I have looked at the specs and I think I will probably go with the FM 40's with Delta Flow. They shouldn't be too much louder inside, but much loader outside.

Les