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SE Level Member
03-09-2018
Hey gang. I have an 08 na 3.8l with 225 000 kms and I need to replace the cat.....again. I bought a walker cat but this time I'm thinking of spending more and buying the bosal cat. Just wondering if anyone used it on here andy how it worked out. I DO NOT WANT TO DO THIS AGAIN lol. But serves me right I guess cuz when I did my lim I didn't torque to it to spec and didn't goop the corners which killed the 1st one.
Thanks
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#2
Re: Which cat is better
03-09-2018
97 GTP Sold-prolly rusted away by now
2011 F-150 Yote powered
Too Hot to Handle, Too Cold to Hold
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#3
Re: Which cat is better
03-09-2018
you would need a stock replacement or you'll get a cat code.
whats wrong with the one you got now? cant see no rtv in the corners of a lim killing a can. they need to run pig rich to kill one fast.
if you have a high flow cat now, thats the issue i bet. cars not gonna like that hi flow cat.
you got a code for a cat?
98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails
L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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#4
Re: Which cat is better
Turbo is the way to go.
03-09-2018
I think he means the engine was burning a lot of coolant with a improper install of the LIM. Lots of coolant or oil burning will wipe out the converters faster than some think.
SMGPFC Member #1
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#5
Re: Which cat is better
SE Level Member
03-11-2018
The cat is plugged from coolant andy a ridiculous amount of oil being burned by the lim job done wrong. The can't get the car over 3500 rpm. I just want cheapest fix possible. But yet I need it work right. If I delete the cat amd get a code would that effect gas mileage and overall performance of the engine?
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#6
Re: Which cat is better
SE Level Member
03-11-2018
And yes I'm getting a code. 420 for cat. I plan on keeping it till I scrap it so want to do the right thing.
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#7
Re: Which cat is better
Turbo is the way to go.
03-11-2018
Yes, no cat will always cause a code and poor mileage in your year car.
I say either cat will work, a new walker or the bosal cat. Both have warranties too.
SMGPFC Member #1
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#8
Re: Which cat is better
GT Level Member
03-12-2018
I bought a ebay high flow cat and use the spark plug nonfouler trick to pull the 02 sensor out of the exhaust stream a little to not get a light.
04 GP GT- top swap, VS cam, 2.8 pulley, E85, headers, 60 injectors, TEP 3:29 trans, Racelogic Traction Control, ZZP dyno tuned.
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Post Thanks / Like - 0 Thanks, 1 Likes, 0 Dislikes
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#9
Re: Which cat is better
Donating Users
Chris B
2009 CX-9
** SOLD ** 2002 GT
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#10
Re: Which cat is better
03-12-2018
damn fools put a U bend in it, that blows.
98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails
L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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#11
Re: Which cat is better
GrandPrix Junkie
03-13-2018
yep that's why i went with a bosal one once. no u-bend. I've been running a zzp cat-less downpipe for years and I love it cause I'll never have to worry about a cat again. Obviously I have a tune to eliminate the light along with other things.
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#12
Re: Which cat is better
Donating Users
03-13-2018
Originally Posted by
Scottydoggs
damn fools put a U bend in it, that blows.
That's the only way to call it OE replacement. LOL
Chris B
2009 CX-9
** SOLD ** 2002 GT
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#13
Re: Which cat is better
Turbo is the way to go.
03-13-2018
The u-bend in the aftermarket ones do not get as small as the factory pipe though, they kept the design so the o2 sensor would fit in the same spot.
SMGPFC Member #1
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#14
Re: Which cat is better
GT Level Member
09-27-2018
Can't speak for Walker or Bosal cat converters although I can tell you Bosal did make the factory catback for our cars (at least on the Grand Prix GT/GTPs). From my personal experience though I used the cat that came with the SLP headers. The first one lasted about 2 years. The 2nd one lasted about 6 years. After that 2nd SLP cat I couldn't find anymore available out there so I went with a Magnaflow hi-flow universal cat. I've had that one about 5 years so far no issues. The aftermarket units are kind of a mixed bag. I would go with one that has a better warranty