I just ordered a 3 chamber flowmaster series 40 for my 4.2L. I am keeping the factory pipe.
I also just added a K&N filter for my truck also.
Is this set up going to work? The guy at the muffler place assured mt that it would not make a whinning sound, but give it a deeper growl to it. (not like a V-8, I know).
How much HP gain should I see from the flowmaster and K&N; plus will I get better MPG?

Thanks,

Fake

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Ford vs Chevy
www.fordvschevy.com
Moderator: Road Kill, Mustang vs F-bodies
2000 White F-150 Sport 4.2L 5-speed,3.55 gears
No Mods Yet
superstang97@yahoo.com

 

The 40 series flowmaster is a two chamber and is their loudest. If you got a three chamber it is either a 50 or 70 series, 70 series being the quietest. In any case the performance from all is very simular and will be an improvement. I rean an article last year in one of the 4 wheel mags where they did a step by step exhaust change and they picked up 8 hp with just a flowmaster on a 350.

You should actually feel a little difference with the muffler change, probably won't feel as much improvement from the K&N but it will be there. Overall you will probably pick up 5-10 hp. Your stock 2.5 in exhaust is plenty big enough for the 4.2. Most people who go bigger loose some low end torque. You probably won't see much improvement on MPG. Next thing you need is the Superchip.

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98 Nascar Edition, Superchip, Airaid, Flowmaster 70 series, bedliner, in bed tool box, Profile bug deflector and window vents, Class III receiver hitch.

 

Johnny is correct. I think the 30 series is also a three chamber and is pretty quiet.

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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 03-20-2000).]

 

Also, does removing the air intake silencer help with the K&N filter? If so, how do you get the dang thing off?

------------------
Ford vs Chevy
www.fordvschevy.com
Moderator: Road Kill, Mustang vs F-bodies
2000 White F-150 Sport 4.2L 5-speed,3.55 gears
MODSK&N,Flowmaster 40 series.
superstang97@yahoo.com

 

I dont have a 4.2, but I do have a 5.4..I went with flowmaster 40 ser w/3in out rear side and k&n filter kit..these were good mod's but what you absoulity have to get next is the SUPERCHIP from mike...the superchip was by far the best thing I have done yet...this whole web site stands behind the superchip...that says alot..good kuck

 

FAKE FVC

CHECK OUT THE TECH ARTICLES AND THEY WALK YOU RIGHT THROUGH IT IT IS KIND OF DIFFICULT BUT IF YOU ARE CREATIVE YOU CAN DO IT , IAND IF YOU MESS UP YOU COULD STILL GO WITH THE AIR RAID OR THE K&N INDUCTION, I WAS ABLE TO DO IT BUT I DIDN'T LIKE THE WAY IT LOOKES SO I PURCHASED THE AIR RAID YESTERDAY BUT HAVENT HAD TIME TO INSTALL IT GOOD LUCK

1997 REGULAR CAB, 4.6 LARIAT. 4X4 40 SERIES FLOWMASTER, K&N

 

HEY--- I just had the flowmaster 40 series put on my 4.2-with a wicked 3inch tip. I already had a k&n with no air box.

At idle my f150 has a low quite deep rumble..AND when you floor it ,,it turns to a loud deep rippin rumble..
damm good mod.....

97 F150-
STANDARD CAB FLAREINGSIDE--
REAL XENON H.I.D.'S