Cats Have Been Deleted (Pics)

[v10enomous]

I had the Cats removed from my 98 GTS about a week ago and put the spark plug non-foulers on the sensors. Both sills had heat discoloration when I bough the car so I had those resprayed as well. I'm not sure but a couple of people have told me that the car has a Belanger exhaust and I thought it also had the stock cats but looking at some pictures I couldn't be sure of that either.

Anyway... I've driven the car over 100 miles since and I have to say that I love it. It really is like a different car now. The heat in and around the car is 1/3 or less than what it used to be and the sills get a little warm but never hot and I've been driving in 90+ weather. The sound is fantastic too... It has a deep pitch and rumble and there is no backfiring or popping on decel either... I did notice some fumes at one point but I was stopped at a light and sitting under an overpass so I'm not really sure if it was me or not.

My car is on a collector registration and inspection so that won't be an issue but there is no CEL so it would probably pass a standard tailpipe smogging. If you have been thinking about deleting your Cats and weren't really sure I say go for it

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[vancouver-gts]

That is the factory cat you had on. My sills are discolored as well since the January repaint ,so my cats got to go sooner than later

 

[vipergtspa]

Where did you get the cat delete pipe? and how long of a pipe is needed to delete the cats?

 

[Rheeder218]

how old are those tires?

 

[plumcrazy]

good move !!!

 

[v10enomous]

Ok... The shop fabbed the pipe from raw stock and welded it. 3 hours each side... Not excacly sure how long the delete pipes came out to be but it wasn't expensive for the pipe. The clamps were about $22 each. The tires are ancient and they are the next thing on my list... I'm thinking of going with the BF Goodrich G-FORCE T/A KDW tires and then I'm done for a while.

 

[Rizzo]

Deleting the cats is the first thing I do on every performance car I buy. Runs cooler and sounds better... and after the past 2 crappy summers we've had Im doing everything I can to warm up this damn planet again...LOL

 

[Russ M]

Should be the first mod any Viper owner does, like everyone that has done it says they become different cars to drive.

 

[Joseph Dell]

Ok... The shop fabbed the pipe from raw stock and welded it. 3 hours each side... Not excacly sure how long the delete pipes came out to be but it wasn't expensive for the pipe. The clamps were about $22 each. The tires are ancient and they are the next thing on my list... I'm thinking of going with the BF Goodrich G-FORCE T/A KDW tires and then I'm done for a while.

Looks awesome! And great move!

No disrespect, but for the rest of y'all considering this: Autozone has 18" length of 3" pipe for like 6 bucks. that plus a sawsall + 2 clamps and you are done in less than 3 hrs per side. 6 hrs total... that's a long day.

rock on!

 

[v10enomous]

I thought the 3 hours a side was a bit much myself especially because it was wrapped in with a lot of other work including removing and painting the sills anyway. The 6 hours also included the drilling and installing the non-foulers (NBD) and maybe some time to locate and pick up the parts plus the welding. Hopefully no test drive time Overall I was pleased with the price and quality of the work.

Looks awesome! And great move!

No disrespect, but for the rest of y'all considering this: Autozone has 18" length of 3" pipe for like 6 bucks. that plus a sawsall + 2 clamps and you are done in less than 3 hrs per side. 6 hrs total... that's a long day.

rock on!

 

[vipergtspa]

Looks awesome! And great move!

No disrespect, but for the rest of y'all considering this: Autozone has 18" length of 3" pipe for like 6 bucks. that plus a sawsall + 2 clamps and you are done in less than 3 hrs per side. 6 hrs total... that's a long day.

rock on!

Just wondering but would it not be better to use 2 1/2inch pipe instead of 3inch pipe for the stock size which is 2 1/4inch?

 

[GViper]

Can someone do this themselves?
What would be needed to get rid of the cats?

Thanks

 

[ViperTony]

Be cafeul with the clamps you're using below. Those threaded studs may stick out far enough where they will rub/burn through the side-sill insulation and eventually your side sills. Difficult to tell from the pic if they protrude too far but something to be aware of.

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[RTTTTed]

The stock cats are so bad we should call them "Government Cats" since that's why they're on the car and work so badly.

 

[v10enomous]

I agree the Cats really do almost ruin the car. It's so nice to be able to roll up the windows when it's 95 and actually freeze yourself with the a/c. It just sounds so much better now too. The car has a real howl in the lower range and it's like a Heavy Metal Power Chord up top. It may just be the sound but the car does feel more responsive too. The interior noise is a bit louder but I like that too.

 

[Viper Grenade]

Cats don't belong in your exhaust. lol

 

[runin1320]

Doing mine next week...can't wait.

 

[plumcrazy]

on a silver car, its even more important to do this mod. those sills will stay silver now once painted.

 

[eucharistos]

not that i want more, but i'm surprised more places don't require sniffer testing

 

[plumcrazy]

mine passed NJ emissions

 

[cyaford]

Just wondering but would it not be better to use 2 1/2inch pipe instead of 3inch pipe for the stock size which is 2 1/4inch?

Don't most people go to a full 3" system after doing all of the other basic mods? If it was a lower hp car, I could see using just a 3" cat back.

 

[eliems]

IS it true that the car might throw codes with the cats deleted?

 

[v10enomous]

Most folks including myself have eliminated the CEL by putting a spark plug non fouler over the rear sensors.

IS it true that the car might throw codes with the cats deleted?

 

[cyaford]

IS it true that the car might throw codes with the cats deleted?

Depends on the year. I'm sure someone will chime in on what years throw CELs and which do not.

 

[RTTTTed]

The emissions testing do visual insoections for the cats - they supposedly remove a tiny amount of Nitrates(?) from the exhaust while increaseing C02 emissions because of the restriction. Adding toxic metal to our cars to be more green?

Duh, hello ...

Ted

 

[Camfab]

One thing is for sure, no cats equals really embarassing fumes at a stop light. I never thought I'd admit it, but cats really should be on every car. At least hi flows anyway.

 

[v10enomous]

This is sort of a reversal because back in 1975 or so when they first started putting Cats on, the Cats were always known for creating a rotten egg smell and starting national parks ablaze and stuff... I never thought I'd see the day when Cats would be seen as a good thing. Having owned and driven a couple of dozen Pre-75 performance and transportation type cars I can't ever remember being embarrassed by an odor unless I hadn't showered of course. I love the smell of unburnt fuel in the morning anyway. Especially if it's two stroke.

One thing is for sure, no cats equals really embarassing fumes at a stop light. I never thought I'd admit it, but cats really should be on every car. At least hi flows anyway.

 

[plumcrazy]

i dont smell it too much when at idle, might be worse for other cars around me but thats not my problem.

 

[Viper Scot]

How much more does the exhaust spit flames without the cats? I suppose it depends on the rest of the tune of the car but say with head work and cam?

 

[RTTTTed]

Spit flames? There shouldn't be any unburnt fuel coming through the engine. Perhaps the Roe bein the exception because of it's 2" long intake runners, but I don't smell fuel from my car at idle. I do smell exhaust while driving if the window is down a little - it reminds me that I need to seal my rear GTS cabin vents. People were complaining of smelling exhaust behind me, but I think I've finally tuned it much better. The a/f mix was from 10.5 and now into the 11s. No cats