hey ladies, im looking at this x pipe from brenspeeds ebay store and i'd like to know if my xcal 2 tuner can turn off the O2 idiot light (it will throw it since im removing the cats....... right????)

also, it doesnt say what the pipes are made of so im guessing aluminized steel. thats the same as the factory piping right?

realisticly what kind of gains should i expect by getting rid of the cats and using this? i know it will sound a little louder, but im looking for numbers here. would i be better with underdrive pullies for a similar price?

lastly, should i just use this money towards tokico shocks and struts? (not the d specs, just the regular ones)

*edit* may be able to pick up on these
http://www.fordracingparts.com/parts...tKeyField=8684

for like 200 bucks or less if things work out...... im thinking thats a hellofagood deal and they gotta be ALOT better than stock.