2. Tuner Category - Intake

Everything from Sport Category is legal, but now forced induction cars can change charge pipes and blow-off valves or add/replace an intercooler. Only the minimal amount of trimming can be done to install it though, so if you get too fancy with openings and such, it's off to Max you go!

Tuner Category Intake - Full Rules

In addition to the Sport Category allowed modifications, the following modifications may be made to Tuner Category vehicle intakes:

1. Intercoolers
As utilized only on engines originally equipped with forced induction, induction charge heat exchangers (also known as “intercoolers” or “charge air coolers” [CACs]) are unrestricted in size and configuration and are subject to the following restrictions:

1. Air-to-air CACs and radiators for air-to-liquid CACs must be cooled only by the atmosphere except for standard parts.

2. Body panels, fascias, or structural members may not be cut or altered to facilitate CAC installation.

2. Charge Pipes
Charge pipes may be modified or replaced. Replacement charge pipes may delete or block off factory pipes designed to enhance intake sounds (“noisemakers”). Modification or deletion of vehicle components (e.g. plastic shrouds, wheel well liners) to permit routing of alternate charge pipes is not allowed.

3. Compressor Bypass Valves
Compressor Bypass Valves (CBVs), blow-off valves, and pop-off valves may be replaced or modified.

Sport Category Intake - Full Rules

1. The air intake system up to, but not including, the engine inlet may be modified or replaced.

A. The engine inlet is the throttle body, carburetor, compressor inlet, or intake manifold, whichever comes first relative to the intake flow.

B. The existing structure of the car may not be modified for the passage of ducting from the air cleaner to the engine inlet. Holes may be drilled for mounting.

C. Emissions or engine management components in the air intake system, such as a PCV valve or mass airflow sensor, may not be removed, modified, or replaced, and must retain their original function along the flow path.