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How much power gain with longtubes over factory manifolds?

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Old 12-01-2017, 07:54 AM   #1
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Default How much power gain with longtubes over factory manifolds?

My car has longtubes now but I am starting to not like having them. I don't like the thin metal ticks, or the machinegun sounding rasp at common rpms, I don't like how low they hang etc. Considering swapping back to stock manifolds (or the new Hooker manifolds if they fit) and a custom 3" y pipe with a good merge. How much will the manifolds themselves hold back power? I know the swap from stock to headers/ory is like 20+ but how much of that is y design?
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Old 12-01-2017, 08:06 AM   #2
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A good y-pipe design definitely helps add power over the stock y-pipe. Are we comparing a ORY to stock here?
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Old 12-01-2017, 10:22 AM   #3
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Off road yes or one with good modern high flow cats.
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Old 12-01-2017, 10:30 AM   #4
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I can't say for sure exactly, but I'm betting a good 3" ORY will provide as much gains as the long tubes themselves, when comparing to the stock components
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Old 12-01-2017, 01:10 PM   #5
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So you think swapping to stock manifolds and a good ory from longtubes/ory would lose me maybe 10-15whp or so theoretically?
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Old 12-01-2017, 01:18 PM   #6
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Yes theoretically
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Old 12-04-2017, 09:36 AM   #7
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If you have old slp headers then the more modern design are a lot better and don't hang nearly as low
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Old 12-07-2017, 08:04 PM   #8
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Nah mine are Speed Engineering.
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Old 12-07-2017, 09:10 PM   #9
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After having just finished an install of the blackheart longtubes (and their matching dual system) I can say theirs tuck very nicely. I think that the exhaust hangs a little higher than the factory exhaust did, if not it's right around the same height. Looking forward to being able to easily cruise over speed bumps again! lol
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Old 12-07-2017, 09:44 PM   #10
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That setup is now on my radar since I made this post. I tracked down some installed pictures and I am really surprised by the ground clearance it has. I wish there were more driving videos of it. Not 100% I like the sound of the mufflers yet.
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Old 12-07-2017, 09:52 PM   #11
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A catted ypipe might help
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Old 12-07-2017, 09:55 PM   #12
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I haven't been able to fire my car up yet (waiting on a tune) but as soon as I do I'll post a vid.

Worst case the mufflers are only clamped on and you could add something else to the system (or an exhaust shop would fab something as well)
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Old 12-07-2017, 09:56 PM   #13
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Quote:
Originally Posted by wannafbody View Post
A catted ypipe might help
And the exhaust won't make your eyes water....
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Old 12-08-2017, 12:40 AM   #14
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How about the Thorley LS universal headers,, short tube twin Y..
I have their Tri-Y header on my jeep it definitely opened it up on long hills.
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Old 12-08-2017, 12:48 AM   #15
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Tri-Y's are supposed to be better for the low and mid range, with the top end only a little less than full 4-tube headers.
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Old 12-08-2017, 01:03 PM   #16
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I don't think the Blackheart headers are long tubes. I think mid length as to why they tuck up so good. A buddy also just installed their whole system. Said he's just chasing some little rattles here & there. He's happy with it.
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Old 12-09-2017, 12:37 PM   #17
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Quote:
Originally Posted by SoFla01SSLookinstok View Post
I don't think the Blackheart headers are long tubes. I think mid length as to why they tuck up so good. A buddy also just installed their whole system. Said he's just chasing some little rattles here & there. He's happy with it.
They look to have bot midlength and longtube options. I am curious what the ground clearance difference is between the two header options.
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Old 12-09-2017, 04:31 PM   #18
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A midlength header will always have more ground clearance simply because the collector is further off the ground, and angled up into the engine compartment.
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Old 12-09-2017, 04:40 PM   #19
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Yeah I realize that but I am curious about their clearance anyway.
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Old 12-12-2017, 10:18 AM   #20
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I went TSP 1 7/8 to 3 inch ORY and love it. Bought the complete system from them for a little over $1k and install was a complete breeze.
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