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Drilling through the firewall is required
Connects from inlet MAF housing induction pipe through the OEM sound tube location
Increases the in-cabin rotor sound by up to 50%
Sealed sound tube with special diaphragm cap installed behind pedal
For customers who want to develop and fit the Foster SC Supercharger sound tube according to their own needs
SERRIA/SILVERADO 2014-UP WHIPPLE STAGE 4 INLET PATH whine mod kit 75% WHINE INCREASE SKU 597 other Drilling through the firewall isIncreases the in cabin rotor sound by up to 75% Drilling through the firewall required (bit provided) Sealed sound tube with special diaphragm cap installed on end of sound tube inside cabin. Connects from inlet MAF housing induction pipe through the drilled firewall location. No Stock sound tube required.