Gutted cats... Done it? Heard it?
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Thinking about gutting my cats. Only found one vid on YouTube and it's at wot which doesn't sound to bad. Anyone else have first hand experience gutting or heard em at idle?
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its pretty much the same as having a straight piece of pipe but the greatly increased diameter of the cat gives it a nice sweet tone, i had 2 1/2 inch all straight pipe true duals with hollowed cats on my 88 chevy 1500 and it was loud as **** but a real deep tone, wasnt annoying like most trucks
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I vote offroad pipes.
I've heard gutting your cats will give you a hair less performance because of the way the exhaust scavenges in that bigger opening before squeezing back down into the smaller diameter again.
Who knows... that could be bull. Either way, i dont think there will be much if any sound difference and i know when i do mine, im going to cut em off and throw em to the side incase i ever want to go back to stock.
I've heard gutting your cats will give you a hair less performance because of the way the exhaust scavenges in that bigger opening before squeezing back down into the smaller diameter again.
Who knows... that could be bull. Either way, i dont think there will be much if any sound difference and i know when i do mine, im going to cut em off and throw em to the side incase i ever want to go back to stock.
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But hey, are those test pipes stainless? Welded in or bolted in? Wanna sell em if they are stainless?
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Scavenging doesn't happen at our cats. If anything they are a restrictor. Scavenging efficiency is the advantage of going with headers. Me on the other hand can't stand spending 1200 for 10-15 rwhp. I had found an article a few months back on our manifold flow rates and header flow rates. Out manifolds flow pretty decent. Headers are about creating a negative pressure chamber to suck exhaust gasses out of you cylinder rather than ur piston pushing them out.
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I vote offroad pipes.
I've heard gutting your cats will give you a hair less performance because of the way the exhaust scavenges in that bigger opening before squeezing back down into the smaller diameter again.
Who knows... that could be bull. Either way, i dont think there will be much if any sound difference and i know when i do mine, im going to cut em off and throw em to the side incase i ever want to go back to stock.
I've heard gutting your cats will give you a hair less performance because of the way the exhaust scavenges in that bigger opening before squeezing back down into the smaller diameter again.
Who knows... that could be bull. Either way, i dont think there will be much if any sound difference and i know when i do mine, im going to cut em off and throw em to the side incase i ever want to go back to stock.
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Here you go. http://www.frozenboost.com/product_i...6aa429bc236a69
Don't gut your cats it will create turbulence in the exhaust and also reduce the scavanging effect as said above. Either run a straight pipe through them, get off road pipes, or weld in a pair of those "non-catalytic" convertors.
Don't gut your cats it will create turbulence in the exhaust and also reduce the scavanging effect as said above. Either run a straight pipe through them, get off road pipes, or weld in a pair of those "non-catalytic" convertors.
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I dont think you will gain much HP if you gut the cats on the stock headers.
The LSx needs a set of long tubes to realy let things flow...
Get a set of long tubes and then offroad pipes...
If you on a budget I hear pacesetter has a set out for cheap, wait for some reviews.
The LSx needs a set of long tubes to realy let things flow...
Get a set of long tubes and then offroad pipes...
If you on a budget I hear pacesetter has a set out for cheap, wait for some reviews.
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I think if i do away with my cats, ill just get some straight pipes welded in place for now. No need to go through the trouble of gutting the cats or trying to run a straight pipe through them. Noone ever looks under my car and i have an inspection hook-up anyway.
A little later, ill prob go with ceramic coated pacesetters unless i get lucky and find a used set of kooks. Just cant justify spending $1000 on headers right now.
Both headers(kooks and pacesetters) are LT's anyway so power increase will be the exact same. Only difference is maybe a little in the quality but i ran the ceramic pacesetter LT's and O/R Y-pipe on my reg cab 5.3 silverado i had and they were really nice for the money!! No issues out of them at all.
A little later, ill prob go with ceramic coated pacesetters unless i get lucky and find a used set of kooks. Just cant justify spending $1000 on headers right now.
Both headers(kooks and pacesetters) are LT's anyway so power increase will be the exact same. Only difference is maybe a little in the quality but i ran the ceramic pacesetter LT's and O/R Y-pipe on my reg cab 5.3 silverado i had and they were really nice for the money!! No issues out of them at all.
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If so, id pick them up and run a pipe through the middle just to have them as added security for inspection reasons but like i said in my last post... As long as my buddy keeps doing inspections, i dont have to worry about any of that.
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I have two 3" high flow cats sitting in my closet that I've never installed. I was thinking about using them one day, but I'd sell them if someone wants them. $100 plus shipping.
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Id be all over them if i was planning to run cars. Emissions arent strict enough around here that we NEED them. Yes, we are supposed to have them but i run catless on all my cars and have never had any issues.
But someone will get a good deal thats looking for high flows!
But someone will get a good deal thats looking for high flows!