LS6 intke manifold on LS1??
Thread Starter
On The Tree
Joined: Oct 2007
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LS6 intke manifold on LS1?? How much of a chore is it to swap an ls1 manifold with an ls6 manifold? is the power gain worth the 500 dollars invested and install time? any help would be great. Thanks everyone!
TECH Resident
Joined: Aug 2003
Posts: 970
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From: England UK
It is an easy swap.
The LS6 manifold is deeper, it comes much closer to the top of the engine, therefore your coolant lines that run under the intake will no longer fit when you put on the LS6 intake. There are coolant pipe kits. What I done is plugged the rear coolant holes up in the heads and run the cross over pipe at the front of the heads.
As I say you can buy LS6 coolant pipes, just add this to your cost of the manifold. If you are going to spend that much on an intake why not spend a little more and go for F.A.S.T LSX intake? Remember if you go for the Fast 90 you will need an new TB.
Anyway intake swaps don't take long, I've had mine off a few times now. Just be careful of the oil pressure sender unit between the intake and the vaccuum pipe at the back of the engine.
The LS6 manifold is deeper, it comes much closer to the top of the engine, therefore your coolant lines that run under the intake will no longer fit when you put on the LS6 intake. There are coolant pipe kits. What I done is plugged the rear coolant holes up in the heads and run the cross over pipe at the front of the heads.
As I say you can buy LS6 coolant pipes, just add this to your cost of the manifold. If you are going to spend that much on an intake why not spend a little more and go for F.A.S.T LSX intake? Remember if you go for the Fast 90 you will need an new TB.
Anyway intake swaps don't take long, I've had mine off a few times now. Just be careful of the oil pressure sender unit between the intake and the vaccuum pipe at the back of the engine.
i picked up a LS6 intake for $150 shipped and the coolant tube for another $45 new from GM. Oh and when i bought the Intake manifold that came WITH the t/b for it too
i STOLE it basically. They are EASY to install though man, no worries~Cole~
i STOLE it basically. They are EASY to install though man, no worries~Cole~ Trending Topics
I've got everything I need for the swap now except for the coolant pipe and plug. I'd say for sure to save some cash and do the swap yourself. Check out LS1howto.com for a great writeup.
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Staging Lane
Joined: Aug 2006
Posts: 51
Likes: 0
From: Suffolk, NY
I used my stock coolant pipe, what i did was use a dremel to grind the bottom of the intake ribs/ridges that were interfering with the pipes.
I put one on my trans am and didn't feel any gain. I'm sure you will gain but I just couldn't feel it. I was going to get one for my vette but I decided not to since it just has headers, no cam. I'm guessing it was worth it on my trans am since I have it cammed.
+2 on leaving the coolant pipes alone.Just grind out a channel thru the ridges so you won't have any cooling probs. You may not notice much of a change untill you start to mod up, but then you'll be glad that you got it! It helped me out a lot, like 35 hp after complementing mods of course. Yea don't buy a new one for $500. There are too many guys getting rid of their's for Fast intakes. I sold one of the EGR equipped ones for $325, alot less than $550! Shop around for a cheap used one. Oh, they ain't hard to put on at all,45min topps.
Thread Starter
On The Tree
Joined: Oct 2007
Posts: 160
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so does that mean i can use my stock throttle body on the ls6 manifold? and i hear you gotta just remove the egr.. wont that set SES light or run a code or something of that nature?? let me know fellas. thanks a bunch
I assume the stock t-body would work but it would be the restriction now instead of the intake but it should be fine till you can get a bigger one. As for the EGR, juts get it tuned out at the dyno shop.
the LS6 intake has the exact same throttle body as the LS1. Both intakes even have the same size opening where the throttle body bolts on.
