AEM Bruteforce.
The titan is already a pretty fast truck. Top speed stock being about 127 mph but with a cold air intake with an after market exhaust you'll be about a second faster on the quarter. Stillen makes a super charger but they are very pricey but a superchip always helps as well
None, you have to fabricate a custom one.
Cold air intake (Airaid on mine) Fits stock air filter box and uses oem intake tube/use the non oil type filter w/the pre filter cover. Proper air pressure for tires (i run 36psi always) Keep your lead foot on a diet.
12 - 17 hp
Banks.
A picture is worth a thousand words. Check out this website http://www.sfxperformance.com/project_altima.asp
No. Titan is much too cold for humans.
there are plenty of "How-To's" for home made CAI's (Cold Air Intake) at Neon enthusiast forums (NeonTuners.com and Neons.org are IMO the best examples)
I've noticed better MPG. Look for an air intake with a heat shield, for best results.
cold air intake and exhaust system
By installing an cold air intake on a mustang
i got mine up to 145mph so far... at 6500 rpms. mods= k&n cold air intake