like it says 2 ls1 heads 2 diffrent casting stamped with the same slp070 stamp all cnc ported clean very very clean will throw in some springs pg 600 lift less then 6000 miles all for 250 obo 300 will get you the heads polished on the exhuast and chamber side


can post pics and pay pal only


thanks for looking

 

are they cleaned up or ported?

 

What do you mean 2 dif castings? Do they come with valves?

 

like a 853 and 241 casting and no valves bare with aftermarket springs

 

and there cnc ported and clean like no dirt or build up

 

Pictures.

 

 

wouldn't the different casting numbers cause each side to act different?

 

not if there both teh same, cnc got them matched up not much in diffrence 250 shipped bump bump

 

you might wanna link the pic instead of posting it...'

flow #s?

 

241 and 853 are same heads anyway other than the initial casting process, but as someone said, after cnc, they're identical. bump.

 

241s flow better than 853s stock

 

BUT upon porting, they're identical. . .

 

flow numbers???