Enclosed airboxes: fit and drive
Our airbox products — the i30 N Forge enclosure, the Supra A70 and R34 airboxes — put a box around a filter. They change where the filter breathes from and what it's exposed to; they don't fundamentally alter what the engine's sensors see. For these, a tune isn't required simply to use the airbox. Whether further tuning adds benefit depends on the broader setup of the car — a car that's already tuned for an aftermarket intake is in a different position from a stock one.
Full intake systems: read the product page
A complete intake system changes the airbox, the pipe and sometimes the filter and the cold-air path. Most cars cope fine, but some platforms are sensitive to airflow-meter placement or crankcase-ventilation pressure. That's why we answer per product rather than with a slogan. The current products list what we know on their pages; if a product needs a tune to work properly, it'll say so before you order.
The GR Corolla, specifically
Like most aftermarket intakes for the GR Corolla, our system can trigger an error code relating to the pressure difference through the PCV system. Tuning the car removes the code. A solution for owners who don't intend to tune is in development — if that's you, talk to us before ordering rather than after.
We don't publish airflow, temperature or power figures for any product. There's no test data behind such numbers that would hold across cars, so we describe what the part is made of and how it's designed instead.
When tuning is worth it anyway
If the car has other modifications — exhaust, turbo changes, a different MAF — a tune that accounts for all of them together is where the benefit lives, and the intake is part of that picture. If the car is otherwise stock and the product doesn't require a tune, fit it, enjoy the cleaner bay and the protected filter, and revisit tuning when the rest of the plan catches up.
