stock sonic 1.8 manual can easily push 120 without anything done. ive had it to 117 burnin close to 5grand on the interstate and didnt want to go much faster cause other traffic, was on a 4 lane north in far left and got behind people going barely 80. air resistance is so phenomenal at this speed tho, and there is no car really around that can clock for 180, unless ur pushing some LS3 b/s. but ive noticed after puttin on new wheels and tires, from my stock 15's to new 17's, its much harder to go faster and getting there quicker, it pushes more Rpms, more for the engine to turn, i haven't really pushed my car to it's limits yet, but the fastest ive been with my new wheels and intake was 109, doesnt want to pull alot more dont seem as, if i put the stock on i can go faster, already proved it to myself. hopefully getting a mod in the future and tuning it to get more out of each gear, when i hit 117 i didnt get as much as i can out of every gear, i was already in 5th crusing bout 75 then i decided to try and take off, was in sort of a hurry.