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If you are sticking with the ls1 coolant lines all you have to do is grind the bottom of the manifold as shown and put it on. Whether you keep the foam is up to you. I did this when I got my ls6 intake last year and kept the foam and I have had no problems
I put my foam thingies back on. The only thing I think theyre there for is to keep debris from getting under there. I just slapped em back on. I also grinded off all the tabs too didnt want to mess with it. As for the gaskets, Ive read they are interchangable. Must be just a color diff???
now i understand why to grind the fins... when i took my LS1 intake manifold off there was no doubt that it was an LS1 unit, but i did not have the LS1 tube.
thanks to this pic on ls1howto.com i see what you guys were talking about.
I know this is a little late and kind of off topic for the thread, but what kinda of number are we looking at in terms of a power and torque increase by moving to an ls6 intake as opposed to an ls1 intake??
in the pics of that intake the runner gaskets are red/orange the runner gaskets on the ls6 im i got are gray.
whats the diff?
Those are pics of my intake, and the gaskets are the Fel-pro version, not the GM. That's why they're orange. I got my intake used and decided to replace the gaskets with new ones.
everyone should just do themselves a favor and do what i did, take a hammer,chisel, and whack ALL of those damn ribes off. took me 10 min. tops and had no fitment problems at all
I'm actually doing this as we speak along with headers and motor mounts. Do I need to replace my intake port gaskets or are the ones that came on it (stock GM) reusable? They look to be in good shape but I was wondering if it's necesary?
Since this is the thread that helped me out with my questions I thought I'd contribute pictures of my LS6 manifold after I had finished modifying the bottom. This was done with the hammer and chisel method as mentioned ealier and came out a lot cleaner looking that the grinding method in my opinion. Seemed like grinding them off was going to be a PITA anyway.
Bringing back from the dead one more time. When you take the fins off the LS6 did you shave the whole thing(every fin) or just the back half? Will it cause fitment issues if only the back half is grinded down(front half would sit higher)? Sorry for the newb question just want to get this right before I start hacking.
Bringing back from the dead one more time. When you take the fins off the LS6 did you shave the whole thing(every fin) or just the back half? Will it cause fitment issues if only the back half is grinded down(front half would sit higher)? Sorry for the newb question just want to get this right before I start hacking.
Do it just like my pic and the other pics show and you'll be fine. Mine mounted flush with no fitment issues whatsoever. I would highly recommend chiseling them off also. Seemed a bit more tedious to grind and mine came out looking a lot cleaner than if I were to grind them.
This thread was a complete savior last night when I installed the LS6 intake on my car. As others, I figured I would also contribute back with a picture.
The marked portion is what we knocked out with a chisel & hammer. (Was easier than working tediously with a dremel!)
Last edited by Y2KFirehawk; 02-25-2019 at 12:09 PM.
Reason: Ten years later; updated image linking and re-uploaded
It would be insanely easy to grind down the fins using an angle die grinder and a coarse scotchbrite disc or sanding disc. Would come out much nicer and less change of damaging the intake.
I can definitely see it being insanely tedious trying to do it with a dremel.
01-24-2007, 09:46 PM
