Nice car. Be pretty tough to find model specific aftermarket support for that generation - at least easy to find stuff.
Also, I wouldn't entertain the idea of the Force-Flow stuff - similar ones were sold here under a different name, ended up either hurting performance or breaking apart at speed. Nothing down stream to protect the induction system, the engine will just suck up the broken bits = bad day for you.
I do think it is quite bold of them to offer a performance warranty - though I did not notice any specs on their website. Before you sink in some money - find out what kind of intake pressures you can expect. They might quote some number in CFMs, but that is meaningless if the fan stalls at a certain pressure (ie, fan turns, but not displacing any air).