The SFR Intake Manifold for the Altima is built entirely out of 5052 and 6061 aluminum. Each runner utilizes a velocity stack to maximize airflow and broaden your powerband.Each plenum is formed out of a flat sheet os .125 wall aluminum for superior strength.These intake manifolds are capable of withstanding 50+ psi of boost! Every SFR intake manifold comes with provisions for the stock components. We can weld bungs and fittings for direct vacuum connections,MAT sensors,etc...... for FI vehicles.
This intake manifold eliminates the secondary butterfly system of the stock manifold. By doing this we eliminates the dip in horsepower in the midrange and provide big horsepower gains all the way to redline.This is the perfect intake manifold for direct port nitrous and forced induction systems.You can see form the dyno chart that there is as much as 30 extra horsepower near redline on a stock engine with our intake manifold! Turbo cars will realize much greater horsepower gains!