on the turbo plug Q.....No u cant swap a turbo with Standard....and the difference is how they seal...standard uses the brass washer...the turbo uses a taper'd seal....but there's different taper's for different motor's....so mixing plugs can only be done when u know what match's what...or just buy the stock plugs....they are somewhat expensive....but in the long run they last alot longer...and rarely fail when u know how to tune......The only experience ive had with RB was with a modded C6.....it was quite the wild ride to say the least and still to this day has a top end like No other.....id consider another one some day.