Question about the LS1

**ls1transam312** · 11-30-2009, 09:20 AM

Can you put LS6 heads on a LS1? There is some guy here in town that swears up and down that he has this done. I don't know if its possible or not that is why I am posting this.

**Spaz** · 11-30-2009, 09:28 AM

Originally Posted by ls1transam312

Can you put LS6 heads on a LS1? There is some guy here in town that swears up and down that he has this done. I don't know if its possible or not that is why I am posting this.

you might want to post this in the tech section...

the answer is yes...

**c5z28** · 11-30-2009, 09:48 AM

ls-1, ls-2, ls-6 all compatible parts.

**mark21742** · 11-30-2009, 09:39 PM

the casting number on the Ls6 head is "243" it will be raised on the front corner of the passengerside head (rear corner of the driverside).

yup bolts up the same, but flows better, has bigger, lighter valves than the Ls1 head

**SOMbitch** · 12-01-2009, 12:57 PM

Ls6/1 valves are the same 2.00/1.55 size. The LS6 Vettes are the only cars that received the hollow stem valves. The LS1 GTO's did not. The 799 castings on the LS2's are the exact same casting....

**tep98ws6** · 12-01-2009, 12:58 PM

currently what im doing to mine

**jb3golf** · 12-09-2009, 12:00 PM

As well a nicely ported LS1 head will EASILY outflow a stock LS6 head. Something to think about. You could always uprgrade your stock valvetrain with better Valves, springs and retainers..........all depends on cost differences.

**FORD RECOVERY EXPERT** · 12-10-2009, 06:30 PM

the LSx is considered a lineup of compatable engines, built on the GenIII SBC (or LS1) platform. Just about every GM engine from 2001 on will mix and match most bolt on parts...