View Full Version : Gm Lsx 427, 454,468, 482


texada
01-10-2007, 08:55 AM
I know alot of people are waiting for this block to hit the market. So am I :devil: Anyway, with these large cubic inch engines will we have to run a 2'' header because of the larger bore and big heads?

Ferocity02
01-10-2007, 01:35 PM
Large primary headers would be ideal for any LSx over 400ci. For the tall deck version of the block, you will need custom headers because the heads will sit higher, or you might be able to bend a set of normal ones, not sure.

Chicago Crew UnderBoss
01-10-2007, 09:47 PM
Large primary headers would be ideal for any LSx over 400ci. For the tall deck version of the block, you will need custom headers because the heads will sit higher, or you might be able to bend a set of normal ones, not sure.

Will the tall deck version of the block that sits higher (with the heads) clear the hood of a stock C5 vette and stock LS1 F-body?

Can't wait until these motors are being produced as readily as LS2 402 motors having been made the last year and a half!! :judge: :lock: :drive: :chug:

Ferocity02
01-10-2007, 10:04 PM
Will the tall deck version of the block that sits higher (with the heads) clear the hood of a stock C5 vette and stock LS1 F-body?

I'd imagine it would.

rookie89
01-10-2007, 10:40 PM
Kooks has an off the shelf header with 1 7/8" primaries that step to 2"

Beast96Z
01-14-2007, 05:30 PM
Kooks has an off the shelf header with 1 7/8" primaries that step to 2"That's what I have for my 454.

rookie89
01-14-2007, 09:58 PM
That's what I have for my 454.
hahaha. The reason I know that is because I read it in one of your posts