4.0" to 3.75" Silicone Reducer

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
Genuine 4-ply Silicone (5 silicone layers plus 4 reinforcement layers = 9 total layers!)
Installer can cut silicone parts down to fit with a razor
Heat tolerance: -40° to 392° Fahrenheit
Burst Pressure: 200 PSI
Working Pressure: 50 PSI
Wall Size: 4 mm – 5 mm
Compatible with antifreeze/coolant

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