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No -- the LS2 has cathedral port heads while the LS3 has rectangle port heads. You would be better off porting the LS2 manifold and much better off getting a FAST 102.
As above it doesn't bolt up. Some places like edgy vette port the ls2 manifold. There is the msd and dorman intake too. I go with the fast and am building one rn. It's a fun and pretty easy project.
The fast intake not only picks up top end horsepower, but you pick up power through the rpms as well.
Hence LS2 intake was first year of sonic welding, that was not perfected until the LS3 intake manifold. So with Fast intake, not only are runners smoother to pick up top end, but runner designed to pick up more HP across the board. Hence porting the OEM intake will pick up more top end power, but since your not changing the runners, not going to pick up more HP in the lower rpm range isntead.
As above it doesn't bolt up. Some places like edgy vette port the ls2 manifold. There is the msd and dorman intake too. I go with the fast and am building one rn. It's a fun and pretty easy project.
I see Z06 manifolds off to the right...you putting those on in addition to the FAST?
Yes this base project with get the exhaust manifolds too. I didn't want it getting much at all louder so skipping headers for now. Flex fuel sensor there as well.
Yes this base project with get the exhaust manifolds too. I didn't want it getting much at all louder so skipping headers for now. Flex fuel sensor there as well.
Cool, so you're going with E85 as well? Should play okay with the high-ish compression on the LS2. I installed the Z06 full-length exhaust and think it was a worthwhile upgrade. Not much of a sound difference, but a bit more top-end pull. I'll probably do a FAST next.
I see Z06 manifolds off to the right...you putting those on in addition to the FAST?
I may be wrong, but one of those exhaust manifolds doesn't look like a Z06 unit. The "D" port one does look like a Z06 unit. Z06 units had a more tubular construction look. They look exactly like my 2000 exhaust manifolds. But I'm from C5 land, so..... Just sayin'
Last edited by grinder11; Sep 24, 2024 at 12:46 PM.
Yes, you are correct. As I stated, I have a C5, and I kinda dropped the ball on this one. I apologize. I'll say this; if it wasn't such a PITA to remove my Kooks 1-7/8 LTs, I'd pull them and offer them for sale. Another thing that keeps me from doing this is my Kooks 3" Xpipe, which bolts directly to the headers. The Xpipe would require serious alterations before it could bolt up to the GM manifolds. The OEM LS7 exhaust manifolds are very good, for sure. When Brian Thomson was in business, he had a C6 Z06 he tracked. According to him, when an LS7 is at 600chp, or less, the manifolds put out within 10 hp of the LTs. He did say they didn't have quite the midrange torque the LTs do. I see no reason he'd BS me, since he could sell me a new set of LTs......
Last edited by grinder11; Sep 25, 2024 at 08:26 AM.
intake manifold
