Im a newb here to all this ive been searching some stuff i recently installed an apr chip into my 2002 s4 and i had a few questions. When i installed it i was told that i should do a few things to it liek change spark pluggs, fuel fillter and throttle body boot. i was wondering what i should get and what i should do? i was also wondering if there are any other recomendations to put into the car

 

plain jane ngk copper plugs work great for higher boosted engines. you're TBB should be okay since in 2002 they upgraded the clamps. samco silicone boots is a good upgrade tho or APR bipipes eliminates torn boot issues for good but pricey. get whatever fuel filter. bosch is good. also you may need to upgrade your diverter valves..the higher boost pressures are known to blow out the weak rubber diaphrams inside them. theres pretty extensive research on which diverter valve is the best. blow off valves arent really an option unless tuned properly. you cant just bolt them on or else you throw codes and run rich. but they are an option too

 

copper plugs as bottlecap said are fine for the car


however i just switched to the iridium plugs... and i can tell the difference. much smoother combustion, not to mention they'll last longer

how many miles are on your car?