Invidia Turbo Manifold

If you fit boost to a naturally aspirated engine, or decide to upgrade a turbo to the extent that it no longer fits the standard manifold, you'll need to make a new manifold. If you look at many custom manifolds you'll see what can only be described as works of art. Enormous pains have been taken to achieve equal-length runners and the bends are superbly gentle.

Turbo Manifolds are dyno tested for all out performance for racing applications only. Extensive research and development goes into each component to ensure the best performance for your vehicle. They are precision bent on the CNC mandrel benders using data acquired from the non-contact digitizing scanner. The flanges are CNC machined.

Factory cast-iron turbo manifolds seldom conform to the long-runner-gentle-bend school of design but there are plenty of stories of excellent power being gained from factory exhaust manifolds running much larger than standard turbos. So, if in the real world, the factory exhaust manifold appears to perform much better than many suggest, a fabricated manifold with similar short-length branchings is also likely to be quite adequate in nearly all applications.

Turbo Manifold Piping Diameter

The primary pipes are the main components of any style of header. The most important consideration when selecting headers is the diameter of the primaries. According to the many header company tech folks we talked to, one of the most common mistakes Tuners make when buying headers is getting pipes that are too large in diameter.

For a normal small-block street engine operating in the 1,500- to 3,500-rpm range, most of the manufacturers we talked to recommended 1 1/2- to 1 5/8-inch-diameter primaries, as a rule of thumb, for providing plenty of low- to mid-range torque.

Invidia Turbo Manifold