i was talking to a guy at my local infiniti dealeship, i was asking him can i upgrade my stock brakes to 2010 G37S 4 piston caliper brakes. he told it wasnt wise to that because the master brake cylinder is a different size causing the brakes to pulse, the g37s is larger. is this true? alot of m35 are running the g37s brake system.

i need some more info,pls.

It's quite possible that you'd need to use the G37 master cylinder. But after spring for the calipers and rotors, the MC wouldnt add much cost.