Needless to say,this tranforms your four door Altima into the biggest sleeper to ever to hit the road.Boost pressure is increased from 5 to 8 psi of boost . Even at this moderate boost level,you can expect years of trouble free operation out of your completely stock engine. The stage 2 turbo system upgrades you from the PSC1 fuel controller to the FTC fuel and timing controller which comes pre-tuned by us and adds a manual boost controller which allows you to adjust the boost pressure from 5-8 psi of boost. This is not hype, this is a reality! The best part about this is that you keep your stock drivability and reliability.By keep the boost at a very low 5 psi of boost, you will be sure to get a long, troublefree lifespan out of your stock motor.A key benefit of our approach to desiging this turbo system is lower cost and ease of installation. We designed the exhaust plumbing to bolt right up to the stock exhaust manifolds! This saves alot of hassle and time and makes it easy to return back to stock if neccessary.On top of that we made it easy to get turbocharged now and then offer upgrades so you can keep slowly build up your turbo system to the power levels you want. We also incorporated another unique element to this turbo system and that is converting the MAF sensor into a blow-through unit.By converting to a blow-through system it allowed us to use a conventional blow-off valve and vent it to atmosphere as well as being much safer for the engine.Yes, safer! By convertoring the MAF to be a blow-through unit we eliminate the potential of sucking in unmetered air and running lean, which leads to detonation and possible catastrophic engine failure. We also utilized a Spearco intercooler to keep the charge air temps to help maximize power and increase safety even further. The Speed Force Racing stage 1 single turbo system comes with a 60-1 hi-fi turbocharger, oil feed and drain lines,Tial 38mm wasteate,Tial 50mm blow-off valve, 304SS exhaust plumbing,heat insultation material,Spearco intercoler,aluminum intercooler piping with silicone hoses and stainless clamps,440cc injector upgrade along with a PSC1 fuel controller which comes pre-programmed from SFR, battery relocation kit and all necessary hardware and gaskets needed for a professional installation. And this is just the beginning! We offer a variety of upgrades to allow your Altima to make upto 450WHP on a stock motor.If that is still not enough for you we have built engine packages, fuel system upgrades and transmission upgrades that will allow you to make in excess of 600WHP! Call us for details. This is for Automatic transmission only!!!!! Please be advised these parts are sold as off road use only! Check with your local and state authorities regarding installation on your pollution controlled vehicle!