My cars had the ssm90 on it for 5 years. Im on a intercooled,e85 3.2 pulley going to a 3.0 pulley. Ive made over 70 track pass's and Beat on the car every time I drive it. Granted mines not a daily driver but I am very hard on the car. Only Issues ive had are the trans is getting weak after 5 years of beatings and ive went thru 2 wheel bearings.