i got mine off of ebay from an amg E55 with the supercharger housing for 150. (stole it lol) the supercharged motors have a differently calibrated tb from the na's so you have to take the connector housing off of your na and swap it onto the 74, its just a series of metal clips that pop off. mine was difficult because the housing on the 74 was coated in this plastic epoxy sealer. so it too a screwdriver and a hammer.

then its just bolting it up. TVT claims 5-8hp on a stock motor. im curious to see how much power is gained under the curve because the car feels totally different. we have a dyno day coming up so i'll compare the tb's.

im not sure about gas mileage as i haven't driven it enough yet.

the next things are a v8 maf, bigger injectors and by then hopefully i'll have the turbo kit done.