Just wondering i kno usdm gsr top speed 140 & usdm itr like 143. Read the jdm sir g & itr top out like 115-120. Do yall have ur ecus chipped inorder for u to be able to top out 140 like the usdm gsr/itr. I dont do 140 on public roads. Ive just wanted you guys opinions. Thanks btw i have a 98 ssbp gsr. So i