GFB Whistling Trumpet (only for Stealth FX and WRX Hybrid) - 5701 Techna-Fit You can raise the shift

You can raise the shift knob to 12mm taller than a stock knob to bring it closer to the steering wheel

Efficient temperature regulation for both stock and modified vehicles

1987:Toyota:Corolla:Sport GTS

We ditched the slim stock core and plastic end tanks in favor of a full aluminum

2008:Chevrolet:Silverado 2500 HD:LT

GFB Whistling Trumpet (only for Stealth FX and WRX Hybrid) - 5701 Techna-Fit You can raise the shiftThe 5701 can be used in place of the standard trumpet on GFB valves (Part numbers T9003 & T9503), and will make a whistling sound. However, it is necessary to run the valve so that all (or most) of the air vents through the trumpet ? Respons valves will typically not generate the velocity required to whistle when set to 50 50 venting. The ability to change the sound of a blow off valve is increasingly becoming an important issue with buyers, who want