Hello guys , my name is alan .Im new to this forum. Yes i seen threads on this topic before but they haven't answered all my questions , just bare with me guys . I just bought a 2008 e63 about a month ago . Got a really good deal , paid 25k flat 49k miles from a cop no accidents . Car runs smooth except recently i picked up a weird noise some times i get a clunk sound when I come to a red light . Mind you I still didnt get a tranny fluid exchange , which should be the reason this is happening , other then that it runs perfectly . ill get that issue fixed sometime next week . Im looking into mods , i know its an na motor , i heard its difficult to squeeze power out of this engine but its possible. Im really intrested in kleemann tuning , therefore i talked to cory from kleeman usa. If i get there headers , pus a flash tune , i should be getting around 90-100 hp , add another 80 mm throttle kit and airbox with k&n filters i should be getting an additional 30hp . what else is left besides cams which are too expensive there , around 4k from kleeman . Guys i need to know the maximum mods please w/0 a SC. Any info would be cherished and obv taken into consideration . Thank you

Btw The car is a beast , and sadly i believe a lot of people underestimate the m156 motor . Also feel free to lmk abut any other tuners that have additional tunes for the car that kleeman dosent offer


