Ive had alot of engine work done to my 91 MR2...non turbo.. and most people ive talked to with similar mods but added headers and exhaust have been running WAAAY faster times than i have...and i consider myself a decent driver. So im starting to wonder if the shop really did what i paid for or if the 5s-fe engine is sooo restrictive that i need to open up the exhaust side of it to allow it to flow better to mate with the motor work done. ?? But that would be at almost a 2 second drop in my 1/4 time by simply adding exhaust and header...which doesnt sound right to me at all...so any ideas where i can take my car to have them check it to see what was and WASNT done ?