4.0" to 3.0" Reducer,

Applications:

Joining your intake pipe to the throttle body assembly, air metering assembly, intercooler, BOV pipe, or turbo inlet/outlet.

Custom compressor, intercooler or inlet piping for turbo/supercharged car

Custom cold air intake for nonturbo car

Replacement of all factory rubber parts

These silicone parts can be used in trucks, recreational vehicles, boats, or anything else with an engine.