I'm currently looking into upgrading my 2002 Audi S4 2.7 Bi Turbo Quattro to a ko4 fuel kit yet just undecided which way to go. I got a local shop remommending "Autospeed" who does NOT recommend VAST yet everyone else I talk to says VAST. Now I'm not a mechanic nor do I know much about cars other than the basic.

http://www.autospeed.us/store.php?cr...on=show_detail

or

http://vastperformance.com/shop/prod...products_id=36

yet if i get VAST theres 3 options to get hitachi, bosch and RS4 Bosch not sure what one to get

I've already upgraded to ko4 turbos and just undecided in what fuel kit to go with.

I'm not trying to build this as a race car but yet a fast reliable everyday drivable car.... tips and advise plz

 

Never heard of auto speed. The kits look very similar. Vast is claiming more horse and they have more options, plus it has a lot nicer intake included for less. Plus have you seen all the YouTube vids of vast cars very impressive. I'm thinking about getting the vast kit soon.

 

Two local guys have full stage 3 S4s, one tuned with APR and one with Vast. The APR car runs 20psi and flies - smooth, fast roll into boost and very powerful. The Vast car is faster yet, 25psi and more aggressive fuel/timing curves and a more violent transition into boost than the APR car.