Every HPF M3 turbo system includes a bad to the bone intake manifold that's been optimized for
huge midrange torque and big time topend power. This manifold has been designed
using the latest in technology and has been flow benched to ensure that it
maintains less than a 1% cylinder to cylinder variance. Flow variances between
runners cause individual cylinders to run richer or leaner than others which is
far from ideal. As A:F ratios are usually measured after the exhaust is
collected together, tuning individual cylinders accurately that have uneven
distributions of air is nearly impossible. When this is the case, the leaner
cylinders may get preignition even though the A:F ratios are within limits. This
manifold has been designed to prevent cylinder to cylinder variances which
allows us to optimize the powerband and safely make more power. This manifold
has also been designed to provide perfect cylinder to cylinder distribution for
nitrous or methanol by maximizing the molecules in suspension and directing them
evenly to each cylinder.
