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.

Stock K-member vs. Hawk's Tubular for LS1 Swap

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Old Jul 30, 2006 | 01:33 PM
  #1  
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Stock K-member vs. Hawk's Tubular for LS1 Swap

Hey everyone. I had some questions about the stock K-Member vs. the Hawk's tubular member. I know there are some weight savings and more room for headers with the hawks version. Are there any other advantages with the hawks version?

I'm still undecided about which k member I will use for my LS1/t56 swap next year.

I would like to retain AC for my swap and I know if you use the 4th gen AC that you need to notch the factory K member. Do you still have to notch the stock K member if you use the 3rd gen AC and accessories with the relocation kit? I'd imagine with the Hawks K member, the AC wouldn't get in the way of anything because of the increased room?

Last question. If I do use use the stock k-member, which aftermarket motor mounts seem to work best with the swap (fitment and so on) as I have heard some people complain about fitment issues.

Thanks guys, your opinions would be greatly appreciated and sorry the long post.
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Old Jul 30, 2006 | 02:03 PM
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Hawk's is not DOT approved. Not sure about street use, but drag/race probably good.
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Old Jul 30, 2006 | 02:05 PM
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Check out the LSX Sticky at the top of this forum.

More room and using the LS1 A/C compressor w/o notching is the advantage of going with a tubular k-member. I wouldn't do it for the weight savings, even though there might be some.

I'd go with the Spohn mounts.
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Old Jul 30, 2006 | 02:15 PM
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Car: 89 IrocZ/17 LS 1LE
Engine: 383/LGX
Transmission: 400/TR-3160
Axle/Gears: 3.08/3.27
I think the Hawks/Spohn K-member is a myth .
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Old Jul 30, 2006 | 04:30 PM
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Car: '89 rs convertible
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Not at all , I have one .Do a search on a thread titled "pics of the Hawk's LS1 K-member ". Plenty o' pics!
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Old Jul 30, 2006 | 08:44 PM
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From: Austin, Tx
Car: 91 Z28
Engine: LS1
Transmission: T-56
Axle/Gears: 3.73 Hawks 8.8
Originally Posted by kairles
I think the Hawks/Spohn K-member is a myth .


I've got one too. Personally, I'm not so sure it was worth it.
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Old Jul 30, 2006 | 09:48 PM
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The Hawk's/Spohn one is a myth. The old Hawk's one a local guy was building does exist. As Steven an I found out, it takes a little modifying to work right.

Kevin D.
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Old Jul 31, 2006 | 07:51 AM
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Not really a cost effective mod IMO. Too pricey for so little gains. Spend the dough on other aspects of your build and notch the stock c member. If you cant notch the c member yourself then I would reconsider tackling this swap unless you have DEEP pockets
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Old Jul 31, 2006 | 10:02 AM
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From: Austin, Tx
Car: 91 Z28
Engine: LS1
Transmission: T-56
Axle/Gears: 3.73 Hawks 8.8
Eventually I will have tubular everything, its just one step in that direction.

Another nice thing about the tubular unit is you can easily go to a rack and pinion set up.
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Old Aug 1, 2006 | 09:18 PM
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Car: 89 IrocZ/17 LS 1LE
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Transmission: 400/TR-3160
Axle/Gears: 3.08/3.27
Originally Posted by badjuju342
Not at all , I have one .Do a search on a thread titled "pics of the Hawk's LS1 K-member ". Plenty o' pics!
I was talking about the new one by spohn. the reason I said that is because Im one of the people that has paid for it and is still waiting..........for now
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Old Aug 2, 2006 | 12:27 PM
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From: Southern Illinois
Car: '89 rs convertible
Engine: ls1
Transmission: T56
Axle/Gears: 3.73 posi
What's up with the old one? The one I have is still in the box and I haven't used it yet. I have seen something about the steering hitting lower accessories on the engine but I bought a kit from S&P and relocated everything to the top of the motor. A little more info on this?
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Old Aug 2, 2006 | 11:43 PM
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From: Austin, Tx
Car: 91 Z28
Engine: LS1
Transmission: T-56
Axle/Gears: 3.73 Hawks 8.8
Mine (old version) had a problem with the steering. The drag link would hit the k-member when turning the wheel to the right. I had to flip over the drag link to get enough clearence on the tie-rods
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Old Aug 6, 2006 | 10:35 AM
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Plus it most likely will not work with stock A-arms without a BFH.

Kevin D.
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Old Aug 6, 2006 | 10:38 AM
  #14  
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From: Southern Illinois
Car: '89 rs convertible
Engine: ls1
Transmission: T56
Axle/Gears: 3.73 posi
I'm using the Spohn tubular A-arms.
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Old Aug 12, 2006 | 09:09 PM
  #15  
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From: Lyndonville, VT
Car: 89 Firebird Formula
Engine: Custom Forged 402ci LS2 w/STS Turbo
Transmission: T56 6-speed
Axle/Gears: Moser 9" with 4.11
I've got Hawks tubular k-member and the Spohn tubular A-arms, installed by Hawkins himself.

Great LOOKING mod, in my opinon.
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