hey everyone, i just put some headers on my civic, (had a shop do it) anyway, i dont think it made much difference expect when im going faster like 40mph plus. i looked under the car and it seems like there is a small gap from the header to where the exhaust piping meets. should i be concerned about this or do you think this does not affect the performance at all. any tips on getting my car faster off the line? i have greddy catback exhaust and intake and now headers, but didnt seem to make a difference. thanks everyone.