i own a 99 T/A with a stock intake. P/N 12560688. I just recieved an intake and throttle body from a guy down here, the intake P/N is 12573572. Is this an LS6 intake? The base is flat if that helps, my stock has a hump. Also the other intake has a hole after the throttle body mount and i dont know how i can fill it. Any help would be greatly appreciated, i just bought my car 3 months ago and its my first LS based motor.

 

Yes thats a ls6 intake, The flat bottom, and no hole behind the throttle body for the egr.

 

Another question i can buy the heads off the motor this intake came from for $100. Should i shell out the cash, the heads are in good shape.

 

What heads are on that engine? Casting #?

 

my bet is 241's

 

The heads on my car are 853 i think. i dont know what 241s are. What do the numbers mean?

 

Look where the red circle on my head is, that is where you'll see the casting #.

 

what does that 3 digit casting number mean?

 

It the differnt casting #'s for the differant years and engines. https://ls1tech.com/forums/1740922-post41.html
If its got the 243's I would go for it and maybe throw another couple hundred at them for a port/polish.