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 slp headers fit automatic swaps?

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Old Dec 31, 2009 | 09:38 AM
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ls1 slp headers fit automatic swaps?

just tossing this out here for conversation.
ive never payed attention to these before, but with the short drivers side header, this looks to be an option to clear an automatic if the tubes cleared the chassis.
the passenger side looks similar to my hawks headers.
anyone tried these before?
i have no idea the part #.
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Old Dec 31, 2009 | 05:30 PM
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Re: ls1 slp headers fit automatic swaps?

Drivers wont clear the K-member

Pass wont clear the firewall
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Old Dec 31, 2009 | 05:34 PM
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Re: ls1 slp headers fit automatic swaps?

Originally Posted by Pocket
Drivers wont clear the K-member

Pass wont clear the firewall
stock or aftermarket k member?
did it hit the k member itself, or just around the a-arm bracket?
thanks.
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Old Dec 31, 2009 | 07:15 PM
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Re: ls1 slp headers fit automatic swaps?

Looks close, thats for sure.
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Old Dec 31, 2009 | 11:25 PM
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Re: ls1 slp headers fit automatic swaps?

Compare it to 3rd gen SBC headers. The shape isnt even close to fitting

Additionally, the pass header will not fit at all. Noone is going to buy a set of headers just to (maybe) use one side
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Old Jan 1, 2010 | 07:03 AM
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Re: ls1 slp headers fit automatic swaps?

I am honestly thinking of hacking a set of hooker supercomps i have and making new primaries route into the old pipes...
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Old Jan 1, 2010 | 08:58 AM
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Re: ls1 slp headers fit automatic swaps?

Modifying 3rd gen SBC headers is a proven method for low cost longtubes that fit very well
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Old Jan 1, 2010 | 09:23 AM
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Re: ls1 slp headers fit automatic swaps?

Originally Posted by Pocket
Compare it to 3rd gen SBC headers. The shape isnt even close to fitting

Additionally, the pass header will not fit at all. Noone is going to buy a set of headers just to (maybe) use one side
wasnt comparing it to a sbc header.
if the passenger side doesnt fit, it doesnt fit, but there are always deals out there to be had, so its good to know what IS possible.
wrecked car, hard landing from a wheelstand, etc.... sometimes parts show up super cheap and its worth grabbing them up.
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Old Jan 4, 2010 | 01:52 AM
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Re: ls1 slp headers fit automatic swaps?

Originally Posted by Pocket
Modifying 3rd gen SBC headers is a proven method for low cost longtubes that fit very well
I have heard this as well. Got a link or more information? No one makes a 1 7/8 swap header so im forced to make my own.
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Old Jan 4, 2010 | 07:05 AM
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Re: ls1 slp headers fit automatic swaps?

Yea, i am seriously probably going to use my supercomps, will looks like crap but i am not worried about the looks.
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Old Jan 5, 2010 | 09:24 AM
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Re: ls1 slp headers fit automatic swaps?

are you sure those are ls1 f-body slp headers? Dont look like any of the SLP headers i've ever installed on customer vehicles before.
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Old Jan 5, 2010 | 10:45 AM
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Re: ls1 slp headers fit automatic swaps?

They certainly dont look like my pacesetters for my 99 trans am. Passenger side does but drivers side does not, but i dont remember exactly. Didnt pay too much attention to them.

I know thirdgen headers sweep back further as the Kmember sits pretty much straight down below the middle cylinders

Last edited by Orr89RocZ; Jan 5, 2010 at 10:50 AM.
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Old Jan 5, 2010 | 06:51 PM
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Car: 88 iroc-z/28
Engine: 408 lsx
Transmission: 5800 stall
Axle/Gears: 4.71
Re: ls1 slp headers fit automatic swaps?

that is an older version of the slp header. this is the new version, its a tad different.
doubt it fits either.
http://www.slponline.com/view_produc...46&BIG=30046-1
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