LTX and LSX Putting LT1s, LS1s, and their variants into Third Gens is becoming more popular. This board is for those who are doing and have done the swaps so they can discuss all of their technical aspects including repairs, swap info, and performance upgrades.

LS1, T56, spoon crossmember, Hawk's longtubes what to fo about Y-Pipe?

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Old Dec 25, 2012 | 06:50 PM
  #1  
keith42's Avatar
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Car: 1987 Iroc
Engine: LS1
Transmission: 4L60E
LS1, T56, spoon crossmember, Hawk's longtubes what to fo about Y-Pipe?

Does anyone make a Y-pipe to work with this crossmember or should I have a custom one made?Name:  transcrossmember004.jpg
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Old Dec 26, 2012 | 06:45 AM
  #2  
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From: Bethlehem, CT
Car: 1983 Firebird SE
Engine: C5 LS1
Transmission: 6 speed
Axle/Gears: 3.42
Re: LS1, T56, spoon crossmember, Hawk's longtubes what to fo about Y-Pipe?

I think most folks are using the Hawk's double humped transmission mount (the Skulte original has been discontinued- Skulte has closed and moved on).
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Old Dec 26, 2012 | 09:17 AM
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From: Gobles, Michigan
Car: 92 Ttop Z28
Engine: Cammed 6.0
Transmission: T-56
Axle/Gears: Built 10 bolt-3.90s w/ PBR discs
Re: LS1, T56, spoon crossmember, Hawk's longtubes what to fo about Y-Pipe?

I wish spohn would make a double humped crossmember with the torque arm mount on the crossmember. Looks like the only option without hand fabricating, is hawks double hump crossmember, and BMR's trac-pack torque arm.

I have had my spohn crossmember mounted TA on my car for less than 100 miles and now I have to ditch the whole setup!
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Old Dec 26, 2012 | 09:42 AM
  #4  
keith42's Avatar
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Car: 1987 Iroc
Engine: LS1
Transmission: 4L60E
Re: LS1, T56, spoon crossmember, Hawk's longtubes what to fo about Y-Pipe?

why do you have to swap it out?
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Old Dec 26, 2012 | 11:35 AM
  #5  
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From: Gobles, Michigan
Car: 92 Ttop Z28
Engine: Cammed 6.0
Transmission: T-56
Axle/Gears: Built 10 bolt-3.90s w/ PBR discs
Re: LS1, T56, spoon crossmember, Hawk's longtubes what to fo about Y-Pipe?

The crossmember mounted torque arm crossmember is built the same way as yours, which poses an exhaust routing issue with long tubes( which previous to my ls swap, I did not have). To make exhaust without sacrificing ground clearance, ou usually swap to a double hump crossmember for exhaust clearance. They just don't make one that has a torque arm mount on the crossmember.
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Old Dec 26, 2012 | 11:54 AM
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25th327RS's Avatar
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From: Gobles, Michigan
Car: 92 Ttop Z28
Engine: Cammed 6.0
Transmission: T-56
Axle/Gears: Built 10 bolt-3.90s w/ PBR discs
Re: LS1, T56, spoon crossmember, Hawk's longtubes what to fo about Y-Pipe?

Hawks makes longtube y-pipes, but I believe is only for the smaller sized headers. Even with those, most are not happy with fit and quality. You are pretty much on your own for a ypipe, but the double hump crossmember makes it MUCH easier, and gives you more ground clearance when doing so.
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Old Dec 26, 2012 | 12:58 PM
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From: Bethlehem, CT
Car: 1983 Firebird SE
Engine: C5 LS1
Transmission: 6 speed
Axle/Gears: 3.42
Re: LS1, T56, spoon crossmember, Hawk's longtubes what to fo about Y-Pipe?

I did 2 1/2" y into 3". Got good ground clearance... friend who did exhaust worked at it.
Using a Spohn trans mounted Torque Arm.
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Old Dec 26, 2012 | 01:56 PM
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From: NC
Car: 91 Trans Am
Re: LS1, T56, spoon crossmember, Hawk's longtubes what to fo about Y-Pipe?

Hawks makes a 2.5" Y-pipe to go with crossmembers like that. You'll have to modify it to fit your flanged headers as it is designed for slip fit collectors

http://www.hawksthirdgenparts.com/pr...logy-Cats.html

I have one FS if you're interested
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Old Dec 26, 2012 | 02:12 PM
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Car: 1987 Iroc
Engine: LS1
Transmission: 4L60E
Re: LS1, T56, spoon crossmember, Hawk's longtubes what to fo about Y-Pipe?

thanks for all the replies, looks like I'll be fabbing my own Y-pipe
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