I'm looking for a y-pipe for my 4.6 97 f150 but it's lookin like i'll have to make one. I've got 144,000 miles on 4 cats and the truck is going to be a toy only once the sas is done. I was hoping someone had seen a bolt-in application for this. Any help would be appreciated.

 

If it's just the junction where the two tubes merge into one, Magnaflow and Flowmaster make them. About $30.

 

that's right...flowmaster and magnaflow and i think summit has one too...just slip it on and either weld it or clamp it and you're done for like $20-$50...

Good luck..._motes

 

The way I understood the question is for a replacement pipe from the Y up to the manifolds without cats. So straight pipes from manifolds to the Y pipe. I've been searching for something like this for a year and have yet to find anything. Gotta have it custom made. I'm going to get a custom tune to turn off the rear 02 sensors and then just take a hacksaw to the pipes. Gonna cut out the cats and replace with a piece of flexpipe from Autozone or Discount auto.

The parts ya'll are talking about by magnaflow and such don't have anything to do with the catalytic converters.

 

Thanx for the input- yeah, I was talking about a bolt-in offroad y-pipe that eliminates the cats but the closest I could find was an ad for pacesetter claiming they offered some for some trucks but when I called with my application for use, I was denied. I've got a couple welders and it's looking like i'll have to fab up something myself since shops won't touch it. I didn't notice any rear o2 sensors on my exhaust after the cats- did I overlook them or was this a feature on later models?

 

You should have two sensors before the cats, and two after.

If you are gonna get rid of the cats you should think about putting some long-tube headers on, then having a shop fab-up a killer custom system, either a large single or duals.

 

I've already got installed a flowmaster 40 series 2 chamber w/ 3" single in and 2 21/2" outlets that exit in front of the rear tire and a set of tubular shorty headers. I'd be willing to pull the complete y-pipe out and reweld pipe in where the cats were but I was concerned with everything lining up correct once it was done. No exhaust shops local would touch it because they were concerned with me driving it on the road.

 

Because there is a HUGE $ fine for doing it...that's why a good shop won't touch it....

CLICK HERE TO SEE OUR SHOP TRUCK

 

The stock cats flow pretty well until you add forced induction. You can replace the OEM y-pipe with a 90 degree mandrel bent elbow and a better designed y-pipe to improve power, but anything more will not get much improvement until you supercharge. Save your money. By the time you start replacing cats and adding MIL eliminators, you could drop in a used 5.4L and get at least 50 more ft-pounds.

 

Huh? Are you saying that removing the cats (less than $100) and adding MIL eliminators ($40-$60) is more expensive than a used 5.4L?

you crazy.

 

IMHO the stock cats flow plenty.

I personally don't think aftermarket cats flow any better than the stockers.

$0.02

 

I was thinking replacing stock CATs with aftermarket ones, so more than $140-160. However, spending $140-$160 is a waste of money to get no power improvement for naturally aspirated motors. Invest that in a newer, larger motor, if anything.

 

agreed