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You will need a portion of your stock sound tube for this installation
Foster SC Stage 4 Kit works on both closed air box and open filter or aftermarket CAI systems
sometimes on purpose (injected humour and the like)
The Turbo spooling sound MOD will increase the natural turbo spool (whistle) blowoff valve (woosh) and deceleration pops and burbles on any Turbo application
SVT COBRA 2003-2004 KENNE BELL SC STAGE 4 Inlet path WHINE MOD KIT 75% WHINE INCREASE SKU 446 Universal Kits You will need a portionIncreases 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.