Hi! Next week my S3 will have a remap at SKN on stage1 and i read alot of threads about spark plugs,but i still dont know what plugs would be the best for my car. I started to feel some hesitations in 3rd gear (4500rpm) and i think my plugs are bad! So,what spark plugs do you recommend for stage 1 for best safe performance? The best place to buy? Thank you all!