Will kooks headers and y pipe from a 2012 GMC Sierra 6.2L for on a 2003 Silverado ss 6.0L. Please let me know guys. Thanks.

NNBS TO NBS

 

I want to say no because the transmissions are completely different and the trans cross member are not in the same spots.

But you can make anything work with some cutting and welding.

 

Yeah I'm just worried will the headers bolt onto the block with no problem? Should work with all ls block correct?

 

The 03 ss should have the dual pipes so unless you want to convert to ypipe style single inlet cat back... Headers will bolt up to block, but youd have to completely change the exhaust as far as i know unless im wrong about the newer 6.2 having regular y-pipe like 4.8/5.3 does just larger inlet at cat back