Yes, there will be some modifications you have to do besides the turbo and intercooler and exhaust pipes for them. Turbocharged motors need better airflow then what comes stock on an engine. You should consider a cold air intake and atleast 2.5 inch turbo back exhaust with a high flow catalytic converter. You also need to find out how much boost the stock internals can take before you damage the engine. Once you get everything installed you will need to have it tuned as well. A dyno run performed by someone who knows what they are doing should be able to tune it from that information.
a 1999 avenger es will top out at 128mph I have brought my 2000 dodge Avenger base to 145.
the avenger
5w30
5w30
neons eclipses and talons are your best bet. the engine is called a 420a.
Dodge does not use inertia/reset switches.
5w30
No.
there are several on a 1999 dodge avenger, there is one on the drivers side near the kick panel which is under the dash to the far left and then there in one under the hood
Push the button below them.
No.
Dealer, eBay, etc.