An open velocity-stack intake for the N52 — pure Valvetronic, no throttle plates — that outflowed the N54 intake manifold at every RPM on the dyno. Development history, in-car video, and the full FAQ.
The naturally aspirated N52 has always been airflow-limited by its factory intake. Because the N52 meters air with Valvetronic — variable valve lift — rather than a throttle plate, it runs open velocity stacks with no throttle body at all. Each cylinder gets its own runner, unlocking sharper response and a wide, linear powerband from idle to redline. On the dyno, the 22RPD setup outflowed the N54 intake manifold at every RPM — and made more peak power than the factory 3-stage DISA manifold.
This page tracks the development of the product, shows it running in-car, and answers the questions we get most. The velocity stacks are in production now.
Same car, back to back. The velocity stacks (red) beat the N54 intake manifold (dark) at every point in the curve — 269 whp peak, more peak power than the factory 3-stage DISA manifold.
Where the naturally aspirated N52 goes next, the case for running with no throttle body, and the original beta testing sign-up.
Read →Progress on the design and the Beta 2 release sign-up.
Read →Full public release information. Orders are open now — units ship from the production queue.
Teaming up with ITG to build a dedicated filtration solution for the velocity stacks.
Read →The latest V2 mold revision and the improvements it brings.
Read →Open velocity stacks and a wide, linear powerband. In production now.
