I am considering putting a new exhaust on my 98 XLT 4.2L. I have read and seen people that have changed the entire exhaust from the cat's back and others that have only replaced the mufflers. My initial thought is to replace everyting but with a V6, moving to a 3 inch pipe will probably cause a loss of low end torque, and I think the stock pipes are 2 1/2 inches. Which would you do? All or just the muffler.

Thanks

Randy

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'98 XLT SC, 4.2V6, 4spd Auto, SuperChip, BugflectorII, 50th Aniversery Flooor Mats, K&N Filter, Hard Tonneau Cover, Billet Grill and Insert, Sony CDX-6850 Head Unit, Soundstream Rubicon 405 Amp, JBL GTO 5x7's All 4 Doors, Qlogic 8" sub-enclosure with Kicker Punch XLC Woofer,SuperBrite Bulb Replacements...and More Mods to Come ( If the wife will just agree to them )

http://206.170.51.68/truck

 

I did just the muffler (flowmaster) and I am satisfied with the sound and performance. The cost was pretty nice too - about $80.00 installed.

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99 F150 XLT Silver 2WD S/C 4.2 5-speed, Superchip, Flowmaster muffler // Rear door switch guards - check them out at http://www.geocities.com/motorcity/show/5031

 

No matter what you do bcak there you will lose some low end. I like the Super Truck I just had done. Still out from Cat at 2.5 inches. Good thing is you can keep the stock system intack with this option and replace it if you don't like it. 280 buck however but really nice.

 

I replaced just the muffler (Magnaflow). Sounds like a V8 at idle, but after that you can tell it's a 6.

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'97 XLT Reg. Cab, 4.2V6, 5spd, Superchipped, K&N Air Filter, Lund Deflector, Dash Mat, MagnaFlow Muffler, Hellwig Rear Sway Bar, Edelbrock Shocks, Duraliner, Extang Saber Tonneau, Bell-Tech 2" Rear Drop, Amer. Rac. Atlas Wheels Clad in 275/60/17 Eagle GTII. Likes straightaways, loves twisties.

 

Guys, I appreciate your solutions but I would like to know some reasonings behind your decisions.

Thanks

Randy

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'98 XLT SC, 4.2V6, 4spd Auto, SuperChip, BugflectorII, 50th Aniversery Flooor Mats, K&N Filter, Hard Tonneau Cover, Billet Grill and Insert, Sony CDX-6850 Head Unit, Soundstream Rubicon 405 Amp, JBL GTO 5x7's All 4 Doors, Qlogic 8" sub-enclosure with Kicker Punch XLC Woofer,SuperBrite Bulb Replacements...and More Mods to Come ( If the wife will just agree to them )

http://206.170.51.68/truck

 

Will the Supertruck kill a substantial amount of low end? Is there any set-up that would boost low-end? Thanks in advance....Doc

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1999 F-150 WS 4.2 5-speed, reg. cab, short bed, Sport Grill, Pioneer DEH-P4000 CD, Rockford's 5 1/4 in the corners, Tinted windows, more to come....

 

Cost was one reason, and I really didn't think the V6 would pick up that much HP or TQ from a dual system so I took the money I saved an bought a Superchip.

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99 F150 XLT Silver 2WD S/C 4.2 5-speed, Superchip, Flowmaster muffler // Rear door switch guards - check them out at http://www.geocities.com/motorcity/show/5031

 

Forgeur, I think a 3" cat back for the 4.2 would be a mistake. I'd just go with a good hi-flow muffler. Go to the thread, "Which to Buy, Gibson or Flowmaster" Lot of good info there.

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98 Nascar Edition, Superchip, K&N with airbox mod., Flowmaster 70 series, bedliner, in bed tool box, Profile bug deflector and window vents, Class III receiver hitch.

 

I think 3" on a V6 would be a mistake as well. I just got 3" single put on my 5.0 '92 with Headers and Flowmaster 50 series. Got rid of the cat. converter too. Much better pull through all the gears, a little less response off the line, and it stumbles a bit and bucks at low speed in town. Could be not enough backpressure maybe. But for a V6 a 3" would be overkill in my opinion.

Dean

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'92 F-150 Flareside R/C "Electric Red" 5.0L
mods: K&N FIPK, Hypertech chip, Hedman Hedders, 3" exhaust, 50 series Flowmaster.

 

No doc_150 I think it will hardly be noticable. Unless you tow near the upper limits. This one is not recommended for heavy towing for that reason. I put it on a 4.6L and haven't noticed any change but I only tow below 2500 pounds. It takes advantage of your 2.5 inch stock cat out pipe. I liked most the reversability of the whole thing.

 

Obliterator,
I've noticed, you're the second person in as many days that has removed their CAT.

I guess I'm just getting old but these things are there for a reason. I guess up there where you're at it isn't a crime?

I just had to say something about it...

Carry on...

Mark