Has anyone experienced a loss of any power with true duals and 30 inch glasspacks? I used aluminized packs and pipes 2 1/4 inch for all. Does anyone have any specific performance/mileage gains with this setup? I only had the truck a week before this setup, so don't have any specifics. I put in a basic K&N filter at the same time and reset the computer, and it "feels" better, but is probably phychological.

When I did mine I went with 24" packs and I noticed quite a bit more power. More so on the high RPM, but I think I got more on low end as well. Also gained about 1.5 Mpg better mileage. I couldn't be happier.

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1996 F150 4x4 302, 102,000 miles

Hey POLARISGUY sorry I did not respond earlier. I did not experiance any low end power loss. I also have 24" glass packs I hade the shop install a balance tude aprox. where the pipes y used to be. Do you have the balance tube? I heard that it is a good idea. As for the MPG I actually lost about 1mpg but I think that is do to my driving habits changing, I like to hear the pipes ROAR! I did notice a moderate power gain 2500rpm and up.

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97 f150 ext cab 4x4 4.6L Mods (True duals, mud flaps, ventshade, hood gaurd, more to come!)

I don't know what a balance tube is, but yes, I have the 4.6 with 30 inch 2 1/4 diameter tubes. I haven't noticed any lowend performance and the muffler guy recommended this setup, and he has been in the business for 20 years. Now I wonder if I should get a "balance tube"?

Polarisguy, you didn't say what size motor you have. If you have this set-up on a 4.2 or a 4.6 you probably opened it it too much. They need a little back pressure at low rpm to keep up the torque.

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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.

I have the exact same setup and it definitely added power. I have a balance
tube (H-pipe?) about two feet back from where the pipes route back from the cats.
If this guy has been in the business for
20 years,he probably put one in,but check
anyway,just to be sure. It helps cut down
on reversion by creating a balance between the two sides of the engine. ,,,98



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98 F-150 4.6 Litre XLT2wd Ext. cab
prarie tan/tan int.
K/N gen.II fipk
custom dual exh/gibson rectangle tips/rear exiting.
color matched snuglid
Superchip!!!
Westin nerfs blk .powdercoat
Clear front corners
Cobra 75WXST cb w/weather alert
Kenwood cd w/Radio Shack speakers,don't laugh it sounds pretty good
Viper 500HF Security system
On the way/wheels,tires,air dam, etc..etc.......
doin the monochromatic boogie
on the front end.Billet grilles on order
www.my-f150.com
Fender Guitars,ROCK!!!
http://www.bigsandy.net
officialtomwaits.com
reverendhortonheat.com

Not sure how the balance tube works but they say its good for about 15hp in some cases. All it is is a tube that is placed between the two seperate pipes, I think it equilizes the pressure in both banks.

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97 f150 ext cab 4x4 4.6L Mods (True duals, mud flaps, ventshade, hood gaurd, more to come!)

Well u guys wonderin how to get the best results from JUST an exhaust setup here it is! i have straight duals double tipped on each side running 2 1/2" pipe all the way at a 45 degree with dual 3" tips on each side and i will lay my soul to rest on these words that youll love the results!!!!!

I just read your message and I can say that I feel the same with my f150. I have a 99 flare side w/ the 4.6 also. I had a shop change my exhaust out to duals with 31" glasspacks and although I like the sound, I would swear that I actually lost power. My best friend has a 97 long bed (smae motor) and the same shop did his with 24" gpks and he didn't notice any loss of power. We both have 2 1/4" pipe too. The only real difference is his has a little longer pipe due to the length of the bed. Have you gotten any resolutions for the problem yet? Tried an H-pipe? I would really appreciate any info you may have found.

Thanks.

Went back and had the balance pipe put in. Much improvement, and called the guy up and recommended he not install another setup like this without one. Didn't change the sound much, but did smooth out the powerband. Looking back, buying a "tuned" system, such as Borla (if you've got the cash) is probably the way to go, since there was some research put into it.