howz it goin everyone!

just a quick querry im in the process of doin a lot of wotk to my car eg.. massive headwork and twin throts.. its at the mechanic now and he mentioned to me msd ignition setup for a larger spark which aparently is more performance.. i just brought the ngk iridium spark plugs and dropped them of to him today.. and thats when he mentioned it to me??
any one used it or know the benifts??? is it worth doin????

thanks

i dont have one but i know having bigger leads and better spark plugs is ment to give extra performance