real speed cams

[2001 greenGT]

just out of curiosity does anyone have ( real speed automotives Hi - Intesity Camshaft 6000 RPM ) because im considering getting these because i really would like the added power but the real reason is that i want a aggressive idle and their website says that they could be used with the stock valve springs but higher performance springs are recomended so back to the question does anyone have or know someone with these cams