If the cylinder heads in the LSA engine shares its valvetrain components with the vette LS3 cylinder heads, why did GM limit its rev to 6200rpm vs the vette's 6600 rpm rev limiter?

The LSA specs shown in GMPP catalog shows a 6600 as max recommended rpm :confused:

http://i113.photobucket.com/albums/n227/Khaled_AlHousani/LSAenginespecs.jpg


Besides, New Era Performance took a stock LSA to 6600 rpm and the power continues to go up

http://i113.photobucket.com/albums/n227/Khaled_AlHousani/09ctsv-intaketune.jpg


Does anyone know any info why the LSA engine rev limiter is set at 6200 rpm? Is GM too conservative here?