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exhaust modifcations

exhaust cutouts muffler 02 sensors catback cats catalytic converters

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#1 SSAWD

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Posted 09 December 2014 - 12:55 PM

Ok so Im lookin bolt on a catback exhaust system with Electric exhaust cutout right after the headers. would the the open cutouts **** up the reading on the 02s or no? Also pondering cutting out the cats and putting in a whole exhaust system. just wodering if anybody had tips on dealing with the codes with 02 sensors.


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#2 zachm89

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Posted 09 December 2014 - 01:07 PM

Budget in the money for a tune and have the rear O2s turned off, no worries about codes. Now on to the cutouts. Are you planning on keeping the factory manifolds or replacing them with long tubes? Either way, you can get cutouts in there, but its a pretty tight squeeze. Most guys just run them a bit farther back in the system where there's more room. Thats really just up to you. As far as a bolt on catback, that will also depend on if you choose to keep the factory manifolds and mid pipes or switch to long tubes with an aftermarket set of mids or modify the factory mid pipes to mate up to the headers. There's so many different ways to go about doing it you could end up spending a ton more money in the long run if you don't plan out exactly how you want to do it the first time.


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2BFAST: im a prick, so dont feel bad
zachm89: oh i dont. if Jon is going to play ITG every night then we have every right to put him back in his place....the kitchen... :P

 

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Lowered, 22" TBSS Reps, E-Fans, Magnaflow Exhaust

 

2004 Arrival Blue Silverado SS Procharged (SOLD)

New PB as of 10-14-11: 11.70 @ 112 with a 1.72 60'


#3 SSAWD

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Posted 09 December 2014 - 06:51 PM

Already have Long tube Pacesetters and prefer to run them further back. and Id like to keep the factory mids but if I cut out the cats and replace them with 3" pipes


Dont really wanna get a tune in until I get the flat tappet cam in.


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#4 zachm89

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Posted 10 December 2014 - 01:11 AM

Alrighty then....let us all know how that cam works out.

 

:blink:


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2BFAST: im a prick, so dont feel bad
zachm89: oh i dont. if Jon is going to play ITG every night then we have every right to put him back in his place....the kitchen... :P

 

2003 Arrival Blue Silverado SS: 

Lowered, 22" TBSS Reps, E-Fans, Magnaflow Exhaust

 

2004 Arrival Blue Silverado SS Procharged (SOLD)

New PB as of 10-14-11: 11.70 @ 112 with a 1.72 60'


#5 canadianVRss

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Posted 10 December 2014 - 02:37 AM

Alrighty then....let us all know how that cam works out.
 
:blink:


Lmao :jester:
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#6 GI.SS

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Posted 11 December 2014 - 12:00 AM

Lol
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#7 Blown 346

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Posted 11 December 2014 - 03:40 AM

Any exhaust shop will not remove the cats as its illegal unless they replace them with either high flow or OEM.  If you go to a speed shop thats a different story. They will put in piping where the cats used to be.


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#8 Tyson06SS

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Posted 12 December 2014 - 10:12 AM

^True, but it also depends on the state and county you live in. I'm from Southern Illinois and we don't have emissions down there. I have had my cats taken off at a exhaust shop, they did not have a problem with it and neither did the county when I had it inspected. Now I live in NC and the whole state does a visual inspection and that's it but they have to be there. you can hollow them out and they wouldn't know. 


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#9 Tyson06SS

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Posted 12 December 2014 - 10:17 AM

Zach a tune will give your truck a more efficient HP and TQ curve. With out it your throwing parts at the wall hoping it will make more power. You would need to have a base tune then a retune for every upgrade to maximize your performance, and that my friend is a proven FACT. You can upgrade several things at once when you get the parts piled up after you install them a tune is a must.


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#10 zachm89

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Posted 12 December 2014 - 12:44 PM

Zach a tune will give your truck a more efficient HP and TQ curve. With out it your throwing parts at the wall hoping it will make more power. You would need to have a base tune then a retune for every upgrade to maximize your performance, and that my friend is a proven FACT. You can upgrade several things at once when you get the parts piled up after you install them a tune is a must.

 

Why exactly are you directing that towards me? I think I've been around the block enough times to know the benefits of a tune and having a re-tune done for new mods. I think the real problem here is the OP who along with having no idea where to start on his exhaust, is also planning on installing a "flat tappet" camshaft into his LS engine. I mentioned a tune simply because he was wanting to ditch the cats, along with changing up the entire exhaust system. Of course he will benefit from a tune. But no tune in the world is going to help that camshaft selection.


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2BFAST: im a prick, so dont feel bad
zachm89: oh i dont. if Jon is going to play ITG every night then we have every right to put him back in his place....the kitchen... :P

 

2003 Arrival Blue Silverado SS: 

Lowered, 22" TBSS Reps, E-Fans, Magnaflow Exhaust

 

2004 Arrival Blue Silverado SS Procharged (SOLD)

New PB as of 10-14-11: 11.70 @ 112 with a 1.72 60'


#11 Tyson06SS

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Posted 12 December 2014 - 01:26 PM

Zack my apologies I looked at the wrong name it was SSAWD, not you. Sorry about that I was thinking about the flat tappet cam, like WTF. I got the wrong name, it happens that way sorry again.
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#12 Blown 346

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Posted 12 December 2014 - 08:00 PM

^True, but it also depends on the state and county you live in. I'm from Southern Illinois and we don't have emissions down there. I have had my cats taken off at a exhaust shop, they did not have a problem with it and neither did the county when I had it inspected. Now I live in NC and the whole state does a visual inspection and that's it but they have to be there. you can hollow them out and they wouldn't know. 

I also live in a area where there is no emissions. State law in Illinois is any shop cannot remove cats without putting in new ones or your old ones. Otherwise there is a $5,000 fine on the shop.  Hollowing them out is fine, 


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#13 Tyson06SS

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Posted 12 December 2014 - 08:07 PM

Rockford is not southern Illinois and the last time I looked who listens to ILLINOIS state law? Same state that brought no firearms to Chicago and look how well that one turned out, lol😄!!!
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#14 Blown 346

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Posted 13 December 2014 - 06:03 AM

Illinois is Illinois with the laws. I was just stating a fact whether people abide by the law or they dont. But Any exhaust shop that I have been to would not remove cats for the huge fine and going against the law.  That doesnt mean you cant do it yourself, or go to a buddies shop and do it. I myself dont have a welder so the shops near me were my first option.


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#15 Tyson06SS

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Posted 14 December 2014 - 08:40 AM

^ 100% correct, I completely agree.
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