Bada$$VTEC

iTrader: (1)

Yup,but just dont let the cats "dust" touch you or else you'll itch like hell

Krack3r

Ok, so exactly how many cats do our cars have? If the XLR8 jpipe deletes one. And you guys are talking about deleting 2 more... How is this not throwing CELs.. Or what exactly are you "hollowing out" and where the hell is it located

Hi speed

iTrader: (3)

Ack is hollowing out the two primary cats that are attached to each head on the engine. I think XLR8's J-pipe deletes the 3rd cat which is not monitored, so it will not trigger a Cel. As far as the two primary cats, a defouler is used to avoid a Cel. The primary cats are on the front and rear of the engine, were the exhaust leaves the heads.

350

iTrader: (4)

Crowbar and a mallet works wonders too. Or an acetylene torch to melt the insides out. My biggest hesitation on doing this is I don't feel like messing with removing the rear cat unless it's clogged. If I wasn't worried about getting the material in the heads as it's so close, it would probably be really easy to drop the J pipe and pull the postcat O2's and chisel away for a few minutes with them still on the car. Start it up to blow the rest out, then reinstall the O2's with a spacer. I had done it on the car with an older beater with actual exhaust manifolds, once the honeycomb is compromised the rest blows out pretty quick.

Just curious if anyone ever did it on the car, maybe a few quick wacks, start the car to blow some material out, rinse and repeat until it's done.

Comptechtl2367

Props for the OP trying to make some extra money but if you can take your pre cats off you can gut them your self for free... Its simple.

I hate cars

Agreed. I can't imagine paying for someone to guy my cats. A hammer and prybar/long screwdiver is all you need. I almost did it myself but I don't feel like buying another set when emissions time comes around in 2 years. You're going to pay a lot more than the cost of precat deletes if you have to buy another pair of converters.

Buck007

might have to try out or just get hfpc or both lol

AckTL05

iTrader: (18)

Yeah it turned out to be easy, but it creates a huge mess which sucks. These are made of ceramic so over time these actually can start to break off from engine heat and get sucked back up into the engine.

talmadgeryan

iTrader: (1)

Have any of you hollowed out the cats and noticed your car runs very rich? a little black smoke when you punch the accelerator? overwhelming smell of burned fuel?

Sullytl

Thinking about trying to find some used cats at my local auto salvage and banging them out. These cats look like a pain to remove also. How long to remove for someone who has done it before. Also how much do the dufoulers run roughly? Trying to weigh my options on going this route or just getting pcd

Sullytl

Just talked to auto salvage and they told me its against law to sell me catalytic converters. Anyone hear of this? I'm in FL

20_sec.hatch

im just putting a j35a8 engine in a lighter older car but ill have to keep the cats to pass the sniffer until i get classic status in TX

20_sec.hatch

sullytl: I have heard it is illiagal in the past just find an individual parting out a car and buy them.

Noel Persaud

I'll take a drive out to the dirty jersey Bruce. How much would you charge for install?

Sullytl

Yeah I'll have to keep my eyes open. I like the option of no rasp from gutting factory cats if it yields enough hp gains. Still no dyno?

bouncer07

Almost like paying nothing in replace with your stock one. Good condition stock cats go for about $200.

jpm3071

Are there any pictures or DIYs on this? Any schematics to look at?

Seli8

Very interesting. I have a 2013 TL AWD 3.7 liter. Are they a fit for this car? I live in SJ. Not sure how close that is to you? Are you a mechanic were you can do the install?

twokexlv6coupe

I mean, no one can fault you for not searching, butttt.....

Not only is this thread 10 years old, but @OP hasn't logged on in over a year. I wouldn't hold your breathe.