ok fellas 1988 xjs v12 already removed the resinators (fell off)and anything past there to the back of the car. Just got a little cash from selling my 1966 lincoln. Taking my jag to the muffler shop. for new pipes and mufflers.
should i cut off the catalytic converters or leave them.

looking to get a few more horses and a mean growl from this ride.

what to do????

 

ive got a set of downpipes with gutted cats for sale.. theyll pass a visual inspection but not a smog test. cat delete is good for a lot of power if your cats are clogged, or you might never notice a difference if theyre not clogged.

anywho, the car sounds way better with them removed.

 

if i cut these off or gut them they will have to be welded back on correct?
and if i run without them can i drive the car say 45 miles to the muffler shop??? im in South Carolina so i really dont know how strict they are about having them on or not.

 

one other question, will the removal of the cats lead to any computer problems???

 

Yes.

well, just gutting them won't mean re-wealding as you don't have to cut them off/open to gut 'em



I wouldn't. With the cats cut off you'll be dumping a TON of heat right on the firewall and/or trans.


Cheers
DD

 

No.

On your car the computer has no idea if the cats are in place or not.

Cheers
DD

 

I gutted the cats on each downpipe and removed the other 2 completely, as well as removed the innards of the 4 pipes where they attach to exhaust manifolds. Much throatier sound now, especially with the resonators removed.

 

to gut these things should i just cut the pipes as close to the back of the cats then take a piece of rebar or something to push in there???

 

if someone doesnt buy my pipes by tonight, im chopping them up tomorrow to make the motor removal easier.

 

I just used a prybar to hollow them out. Just beware not to breathe the dust, it's pretty toxic stuff' so wear a dust mask.

 

cordierite ceramic substrate Aluminum oxide, titanium dioxide, silicon dioxide, or a mixture of silica and alumina, Platinum, Palladium, rhodiumCerium, iron, manganese and nickel

 

Or you could have just said "toxic stuff" lol

 

lol

 

Or you could do a bit for clean air and replace your 24 year old cats with 2 new (and modern) free flow cats.

Just my $.02...

 

my Jag runs on Baby seals and childrens tears. those things dont catalyze well.

 

I have 2.5in pipes with highflow cats, if i remove the cats will it sound differently?

 

very.

 

Better or worse

 

this is true for about all cars. they will either sound better or worse.

pontiac grand prix? BETTER
mustang GT? WORSE
buick lesabre? WORSE


that being said, i cant think of anything that would make the glorious Jaguar V12 sound anything less than heavenly.

 

Still can't believe you're going through with the engine swap. It's out now right? *cough*justdroparunningonein*cough*