HemiBrother
Senior Member
Hi everyone! New here. Was wondering if anyone has seen or heard of these eBay y pipe/high flow cats? Worth it or not?
High flow cat Y pipe
- Thread starter HemiBrother
- Start date
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Fast69Mopar
Senior Member
I have used some of these before but not from that seller. So far I would say my success rate is about 80% with these aftermarket units. I've had a few that I have had to install some O2 simulators or make my own with spark plug non-foulers from the local parts store. I have only had one where I had to use HP Tuners to modify the downstream O2 sensors to keep the PCM from setting P0420/P0430 DTC's.
The ones I have used actually worked quite well and the welds were pretty good too. The one modification I did make to each one was by welding in a V-Band clamp at the slip-fit connection so that it would still be easy to remove one side at a time and to prevent any leaks in the future.
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HemiBrother
Senior Member
Thanks appreciate it!
Wild one
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I agree with Fast's idea of the V band clamp,but if that's not feasable,a torque tight clamp is a better option then the U clamp it looks like it comes with.
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diymirage
Banned
Seems like an excellent idea, the stock Y pipe is terribly restrictive
My only concern would be the actual cats, it wouldn't surprise me if they ended up throwing a "catalytic converter inefficiency" code
And there are ways around that as well
My only concern would be the actual cats, it wouldn't surprise me if they ended up throwing a "catalytic converter inefficiency" code
And there are ways around that as well
Wild one
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Read post #2,Fast pretty well covered that
Fast69Mopar
Senior Member
Yeah, the V-Band is not always an option for some people but in my opinion it is the best for this situation. Like @Wild one stated the Torc-Tite exhaust clamp is a good second option that will provide you with good sealing power and they are budget-friendly too.
diymirage
Banned
That's why I didn't go into details
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HemiBrother
Senior Member
That’s what I am wanting to do. I can weld and refab the stock on to flow better, but figured for a price like that why not just unbolt old and bolt in the new and go. Figure I’ll try em out if it throws codes well like you stated couple different ways around that issue.
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HemiBrother
Senior Member
I’ll be using a V-band clamp as well.
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HemiBrother
Senior Member
Definitely looked into doing such mods to the truck but It performs well enough for my needs. I am replacing stock leaky logs with shorties though and wanted to address the stock why pipe restriction. If it gives a little more power awesome if not and just helps it breath a little better and gives it a little more life and no leaks that’s the main reason plus cleans up the old rusty looking parts on it now haha.Just buy Long tubes , they come with all that
Wild one
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I think i would have copied the stamp numbers off my original cats,and stamped the same numbers into the cats,lol
Said no gearhead ever.
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HemiBrother
Senior Member
All good in my county. Plus garage I use looks like a cat is all the more he’s gotta see haha!
Just be careful with low cost cats. I have seen cheap cats come apart and plug up the exhaust system. I have seen it happen in supercharged vehicles and near stock power level, bolt on mod vehicles. Not saying not to do it but if you do just keep an ear out for any rattling coming from the cats or odd exhaust noise.
Adamcr68
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Just thought I would mention it, I definitely wasn’t worried about it, passed safety/emissions the first time, same shop failed it second time.Said no gearhead ever.
The mechanic said he let slide the first time because he liked my truck, but couldn’t do it again.
Nick got me the cats I needed, called his warehouse on west coast to make sure they shipped it same day.
Local exhaust shop welded them in & adjusted the y-pipe, 2k parts & labor.
I looked for work arounds & more lenient shops, but in end I’m glad I went this route & can get it inspected anywhere.
Wish you were my neighbor or I had your fabrication skills, definitely would have found a cheaper fix.
