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Foster SC Kit couples with part of the stock sound tubes – makes installation easy
Increases the in-cabin rotor sound by up to 25%
Connects from inlet MAF housing induction pipe through the firewall location
No drilling through the firewall
Foster SC Stage 4 Kit works on both closed air box and open filter or aftermarket CAI systems
SVT Raptor 2010-2018 WHIPPLE STAGE 4 Inlet path WHINE MOD KIT 100% WHINE INCREASE SKU 190 other Foster SC Kit couples withIncreases the in cabin rotor sound by up to 100% 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.