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Hedman Y pipe diameter?

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Old Feb 3, 2003 | 02:56 PM
  #1  
gruveb's Avatar
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From: Rio Rico, AZ 85648
Car: 1989 IROC-1
Engine: L98
Transmission: 700r4
Hedman Y pipe diameter?

What is the Hedman Y pipe diameter.......the Y pipe they manufacture for their shorty headers that fit 3rd gen F-bodies?
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Old Feb 3, 2003 | 03:12 PM
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From: Parkersburg, IA, U.S.
Car: Trans Am
Engine: L69
Transmission: T5
Axle/Gears: 3.73
I think it is 2.5 if the y pipe says its for the f body than it will work...Kevin
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Old Feb 3, 2003 | 08:20 PM
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gruveb's Avatar
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From: Rio Rico, AZ 85648
Car: 1989 IROC-1
Engine: L98
Transmission: 700r4
I guess I really mean to ask what the diameter of the outlet side of the Y pipe is..........where the two pipes merge into one before they go into the cat....
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Old Feb 3, 2003 | 08:26 PM
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From: Harford County, MD
Car: camaro sportcoupe
Engine: 7.0L
Transmission: G-Force GF5R
Axle/Gears: Moser 9"
it is most definetly 2 1/2" in diameter

Last edited by mw66nova; Feb 3, 2003 at 08:43 PM.
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Old Feb 3, 2003 | 08:36 PM
  #5  
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From: Rio Rico, AZ 85648
Car: 1989 IROC-1
Engine: L98
Transmission: 700r4
Thanks
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Old Mar 14, 2003 | 03:39 AM
  #6  
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From: Glen Allen, VA
so the hedman y pipe collector is only 2.5 inches and not 3?
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Old Mar 14, 2003 | 07:10 PM
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From: out of my mind; be back in 5 minutes....
Car: 1989 Firebird Formula
Engine: Internal Combustion
Transmission: Completed
Axle/Gears: ones that turn.
The collectors (right off the headers) are 3"; these then neck down to something like 2¼", then it's 2½" after the 'Y' back to the converter. Hedman also supplies a 3" converter adapter, gaskets and bolts with the Y-pipe.

Pete
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Old Mar 14, 2003 | 11:42 PM
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From: Faribault, Minnesota
Car: 1989 IROC-Z
Engine: LS1
Transmission: T56
I heard that the hedman Y-pipe is really bad.. Can anyone please say why this is such a bad Y-pipe??
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Old Apr 2, 2003 | 08:59 PM
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From: kentucky
Originally posted by Fbirdta878787
I heard that the hedman Y-pipe is really bad.. Can anyone please say why this is such a bad Y-pipe??
I think it is often tossed because of the 2 1/4" pipes. Hedman calls it a stock cat conv. y -pipe I think. If one could just come up with the right combo of mandrel 3" parts that would resemble that thing. I 'd pay that person for the info... believe me!
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Old Apr 2, 2003 | 09:08 PM
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From: Glen Allen, VA
Check out the Hooker 2055's. they come with a nice 2 1/2 mandrel bent y pipe with a 3 inch collector.
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Old Apr 4, 2003 | 07:19 PM
  #11  
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From: kentucky
I'd stick with the hedman's, 1 5/8" primarys and 3" collectors and no mounting problems.
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