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Exhaust 5.7 HEMI Exhaust Discussion


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  #11  
Old 01-31-2019, 06:24 PM
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Originally Posted by Garc View Post


2012 Challenger 5.7 before and after JBA shorties. This is a slightly detuned 2013+ Ram 5.7, the truck should see more power because of a better breathing intake system and power transfer.
This is great info - thanks for sharing. Got plans for shorties once my powertrain expires.
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  #12  
Old 02-02-2019, 12:47 PM
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Originally Posted by Garc View Post
The shorty headers will bolt direct to the OEM Y-pipe. I do not know of an off the shelf production bolt-on Y for shorty/OEM headers.
Some long tubes offer full replacement but they usually don’t mate well and end up needing a bead weld seal anyway.
Im getting ready to do a trans service among many other things at once and since I would probably have to take it out to get to the trans pan I was hoping to put a more free flowing y-pipe on. Maybe ill just use the mig welder while I have it on my dads lift and build one.
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Old 02-02-2019, 02:08 PM
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You could definitely use something like this with a little fab work.

https://rover.ebay.com/rover/0/0/0?m...2F401612277608
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  #14  
Old 07-11-2019, 10:20 AM
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Will_OT:
Did you ever try this combo of shortys and y-pipe? I'm thinking about doing the same thing and already have the y-pipe installed. I on the other hand do lots of towing but will wrap my headers in order to lower under hood temperature as well as intake temp. I've just now really started to figure the forum thing out. and apologize for not getting in when this post was newer. My input so far is that the y-pipe does make a pretty good mod, it's more snappy off the line, I have single exhaust and 3.21 gears in my 2017 ram, quad cab. Since the y-pipe installed I hang right up with stockers with duals. Never had a chance to ask any of them what gears they are running but have found no hemi ram that pulled off faster from a start and once we run em up I'v always got the upper hand over 60mph. Mash it at 60 and its maxed by the time I pass the guy in front of me. Mods are: AEM drop in air filter, magniflow y-pipe, flow master flow fx muffler. I feel that the y-pipe was a huge improvement over the stock, the stock y is most definitely the weakest weak link that exists in the whole thing and can't believe people would by shortys and cat-backs without addressing the issue with the y-pipe.
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Old 07-11-2019, 12:06 PM
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Mart, do you have any photos of your Y-pipe? I'm curious on your routing, 8 speed right?
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Old 07-11-2019, 06:17 PM
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Yes 8 speed, how do you post pictures?
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Old 07-11-2019, 06:51 PM
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Figured it out, so it's a really tight spot to get good pictures of... The y pipe often times has a small leak at the crotch that needs a spot of weld, I got it, the 90 and 45 from summit. I really didn't have the guts to weld it up myself since the cats are so expensive, I had it done at a shop and found the welds they did also leaked in a couple places and they were closed that day so I patched the welds up myself with my little welder. All together it ran me just under $300 I'm very happy with it and think it's worth it because it smoothed out my idle. No promises pn fuel economy I work all over the place so I don't have a particular rout I travel and often times I'm pulling a trailer. The performance is definitely better, got the power to pull the trailer much easier, I don't see a huge difference off the line but top end is fast. I believe the torque is greater, probably a little hp too but it's no turbo. If you dynoed the results I wouldn't be surprised if you saw maybe as much as 10hp but the torque would be more substantial.
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Old 07-12-2019, 11:33 AM
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Quote:
Originally Posted by Mart View Post
Will_OT:
<snip>
I feel that the y-pipe was a huge improvement over the stock, the stock y is most definitely the weakest weak link that exists in the whole thing and can't believe people would by shortys and cat-backs without addressing the issue with the y-pipe.
+1



the stock Y is a crimped pos with each bank of the engine necked down to <1/2 of the 3" pipe...
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Old 07-12-2019, 05:18 PM
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+1
the stock Y is a crimped pos with each bank of the engine necked down to <1/2 of the 3" pipe...

If you are lucky, the way they mash the two 2.5" pipes together gets inconsistent results. In my case the two pipes didn't come through right one 2.5" pipe was smashed more than the other so one was a half moon shape while the other was oval... If it appears that the two are even I don't know if it's really a big deal. I wish I took a picture of it, it was bad.
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