im new here, i have a question. does putting on a y-pipe increase my horsepower? and if so how much? but if it doesn't than whats the purpose of having it? thanx
J.P.

 

Hi silverjpm17

I replaced the factory Y pipe on my truck and gained a noticable amount of bottom end and mid range power. I don`t know horsepower wise but i would guess at least 10 hp or better. If you look at the stock Y pipe it is reduced down from two and a half to two and a quarter were it is welded to the right side pipe, but the hole that is cut into the right pipe were they meet is only an inch and three quarters, also the angle were they meet does not allow for the best flow.

I hope this answers your questions.

Larry.

------------------
2001 F150 supercab short bed. Modifications so far, k/n fipk, 40 series flowmaster, flowmaster Y collector, electric cooling fans, Bauman shift kit, underdrive pulleys, with more to come.

 

thanx for the info. i looked and the pipe does kinda get smaller toward the weld. do u know which y-pipe is the best if there is one. thanx
J.P.

 

Hi silverjpm17

I got my Y pipe from Jeg`s, it`s called a Y collector part# 389-Y250300A It cost 37.99
there phone# 1-800-345-4545, or jegs.com.

Hope this helps.

Larry.

------------------
2001 F150 supercab short bed. Modifications so far, k/n fipk, 40 series flowmaster, flowmaster Y collector, electric cooling fans, Bauman shift kit, underdrive pulleys, with more to come.

 

The area of the "Y" where it reduces down to 2 1/4" is a dream compaired to what lies inside. Get the FM...it's a fine piece of equipment. Almost...SEXY. I had to fondle it for a few minutes before the install.

-AR

------------------
2001 F-150 XLT 4x4 Off-Road, SuperCab, Flareside, Black[*] 4.6L Triton V8 HPI[*] 5 Speed / 3:55 Reg. Axle[*] Keyless[*] Premium Audio CD

Mods:[*] K&N Intake (Chopped Airbox)[*] Removed Elbow Silencer[*] Flowmaster "Y" Pipe[*] 3" Cat-Back (No Muffler, Turn-Down)[*] Cranked Torsion Bars[*] APC XENON PLASMA Super Whites[*] '01 "L" Taillights[*] Bugshield[*] Bedliner[*] Ventshades[*] Removed Mudflaps[*] "Light Argent" 4x4 Off-Road Decals

Audio:[*] Clarion 6675[*] Rockford Fosgate 5x7's[*] Rockford Fosgate G360A2 Punch Amp[*] JL 12W3-D2 (Ported)[*]Viper 500ESP Alarm

Build Date: 8/23/00 (Kansas City Plant)

 

Does anyone out there have some good pics of this mod?? I have seen the pics from the "nice little 4.6 exhaust mod" thread. It doesn't really look like they used the Flowmaster type of 'Y' collector. It appears to be more of a custom fabricated piece. It also looks like the drivers side part of the 'Y' was re-routed behind the torsion bar cross member. Is this the way that you guys who have done this mod routed the pipes?? I looked at the stock 'Y' pipe in my SCrew and what a POS. I want to do this mod with a FM 50 but would just like to see a couple of examples, maybe even print the pics to show the shop. Thanks in advance.

 

Does anyone know if the "Y" on the 5.4L is the same as on the V-10? Reason I ask is I have an "02" V-10 SD on order that will be getting a Gibson Sweptside and if the "Y" is the same may as well do both at once.
Thanks

------------------
2000 F-150, XLT, SPORT 4X4, BRIGHT RED/DARK GRAPHITE, SUPER CAB,
SHORT BED, 5.4L, AUTO, 3:55LS, TOW PACKAGE, HD COOLING/ELECT, SKID PLATES
SPORT CLOTH SIX WAY POWER CAPTAIN'S CHAIRS, CONSOLE, SINGLE CD,
CRUISE,ESOF,REMOTE KEYLESS, FORD SNAPLESS TONNEAU COVER, FORD BEDLINER,
FORD MOLDED SPLASH GUARDS, FORD BODY COLOR CABSTEPS,
MODS: CATCH ALL FRONT MATS, LUND DEFLECTOR, FORD VENT SHADES,
GIBSON SWEPTSIDE CATBACK,
K&N GENII FIPK,
FORD HITCH COVER

NEXT: SUPERCHIP!!

 

If you're going to cut out the Y, just put in a X pipe and go true duals. A DI/DO muffler costs the same as a SI/DO so why not? Keep pipe size at 2.5" and with the X pipe you will enhance the low and mid range as well as the top end. Just my .02.

------------------
- 2001 F150 Harley Davidson Special
- 1993 Mazda Miata, wifes car
- 1994 Harley Davidson Heritage
- 1976 Honda CB750K, Original
- 1965 Honda 305 Dream, Original
- 1971 Triumph Trophy 650, Original
- 1971 Norton Commando
- 1970 Honda Trail 90, Original
- Yamaha 500 Short Tracker, racing #69
- 1984 Yamaha Virago 1000, wifes bike
- 1981 Honda Passport 70, wifes bike
- My on-line album
- My Webpage

 

Why go with a dual in/dual out? Spend the xtra $50 for another Flowmaster 40 series single in/out and have true duals. Oh yeah, don't forget the "H" pipe- or equalizer pipe...whichever you prefer to call it. Love the way mine sounds!!

------------------
1997 F-150 Lariat SuperCab 4x4, 2-tone: white w/tan bottom, 4.6L, aoutmatic, Towing package, K&N Filter, Custom Cat-back true dual exhaust with 2 FLOWMASTER Series 40 Delta Flows and 4" x 22" chrome tips(out the back of course), Bridgestone Dueller A/T's 265/75/16, Ventshade Bug and Window Deflectors.

 

Installation of the "Y" pipe would seem to give the biggest bang for the buck.

------------------
1997 F150 reg cab, flareside
4.6 5spd 2wd 3.08
Steeda pulleys
Jacobs DIS
Accel coil packs
K&N FIPK
Airaid poweraid
MSD wires
Superchip
Dyna Glass cover
Center Line Cobra wheels
GoodYear 275/60/R17 tires on front, new 285/65/R17 on rear
Dark Toreador Red
Cordovan Interior
Alpine AM/FM/CD
Love My Truck
Next Mod: Electric fan