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13,578 Posts
Discussion Starter #1
I'm just wondering if there are any reasons not to remove the pre cat on my truck and if it's even worth it(noticeable performance gain?). I'd still have enough backpressure, right? Are there any sensors to worry about?

Oh, and I'm in Mississippi so I don't give a rat's ass about emissions. :D

Thanks guys.
 

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I'd Rather be Blown than Injected
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251 Posts
on my 2000 there were 2, one on each side. Had both removed
truck runs better and no check lits come on. so do it.
 

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Discussion Starter #4
Cool, thanks man :thumbup:

You just replaced with a piece of pipe I assume?
 

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I'd Rather be Blown than Injected
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251 Posts
Yes. had a piece of pipe welded in.
 

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Cali Member
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50 Posts
I think aftermarket Y-pipes such as the SLP for example eliminate the pre cat, while also providing smoother flow with a larger diameter and mandrel bends... i'm such a salesman

but i can't say i've ever seen an aftermarket y-pipe with the pre-cat on it, and they're not too expensive...
 

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I'd Rather be Blown than Injected
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251 Posts
Alot of people complain that when you use the SLP Y pipe with
headers and a good cat back you lose low end torque.
 
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