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.

subframe connetors for ls1 swap?

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Old Mar 28, 2007 | 12:41 PM
  #1  
Blkdth87's Avatar
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From: Huntington Station Ny
Car: 1989 TRANS AM
Engine: 2004 GTO LS1
Transmission: 4L60E
Axle/Gears: 02 ws6 torsen diff 3:42
subframe connetors for ls1 swap?

ok, i picked up a set of i think bmr subframes awhile back, and was goin to install them, looks like now thanks to the hawks ls1 ypipe, i have no room for them, anyone got ideas? different subframe connectors? i don't really feel like changing my ypipe / tranny crossmember unless completely necessary.
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Old Mar 28, 2007 | 04:18 PM
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From: Beloeil, Quebec
Car: IROC-Z
Engine: LSx
Transmission: T56
Axle/Gears: Fabbed 9"
Re: subframe connetors for ls1 swap?

I went with Spohn. They follow the rocker panels on each side. They dont go near the tranny tunnel or the exhaust. The fit was awesome.
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Old Mar 28, 2007 | 05:30 PM
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cam-'s Avatar
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From: In the Garage
Car: Camaro
Engine: 6.2L
Transmission: T56
Re: subframe connetors for ls1 swap?

I have SSM/kenny brown knock offs ( I knocked em off LOL ) but SSM if you can find them are very VERY nice connectors. They are boxed, tie into the rear suspension, and weld in all the way down the rockers and floors with no ground clearance lost or interference at all with c mem or anything for that matter.
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Old Jun 8, 2010 | 10:23 PM
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bigals87z28's Avatar
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From: Ocean, NJ
Car: Check The Sig
Re: subframe connetors for ls1 swap?

Bringing this back up. Which one of BMR's SFC's are better for those of us that are doing LT's on thier LT1/LS1.
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Old Jun 9, 2010 | 05:19 AM
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From: Fort Myers, FL
Car: 91 Firebird
Engine: 6.0
Transmission: T56
Axle/Gears: 3.73
Re: subframe connetors for ls1 swap?

I wouldn't use BMR SFC's

I used them on my last build, and the fit isn't that great. They do not follow the rocker at all, and you can see them from outside the car. Yeah, its *that* bad. Plus the loss of ground clearance......

I would use Spohn, UMI, SSM, etc

I would avoid the BMR's........
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Old Jun 9, 2010 | 08:06 AM
  #6  
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From: Lake Jackson Tx
Car: 91z,97ws6,98fb,87&90jeep,05 yz250
Engine: 5.0tpi,5.7LT4,5.7LS1,4.2I6,5.7TPI,1
Transmission: t5,4l60e,
Axle/Gears: 3.42
Re: subframe connetors for ls1 swap?

we ran the bmr w longe tubes in our lsx swap they fit just fine and you cant see them

SFC009Boxed Subframe Connectors for outside framerail exhaust$199.95 pr.
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Old Jun 16, 2010 | 12:09 AM
  #7  
bigals87z28's Avatar
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Re: subframe connetors for ls1 swap?

Anyone else? Im ready to buy...
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Old Jun 16, 2010 | 04:51 PM
  #8  
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
I used Spohn in one car and UMI in the other. I assume you'll be running custom exhaust, so the exhaust interference I had with the Spohn's and the Hooker 2055HKR y-pipe wouldn't be a problem, and I'd recommend them for fit. The UMI's are okay, I like their saddle connection to the LCA bracket better than the Spohn single-side interface, but the UMI's don't fit as snug up to the floorpan as the Spohn do.
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Old Jun 17, 2010 | 01:16 AM
  #9  
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From: Hou. TX
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: subframe connetors for ls1 swap?

I have the Competition Engineering wel ins and they are great, out of the way for a full length setup with Y pipe. Priced right and pretty strong.
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