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My maggie does not rattle at all but your car does sound like it's idling a fair amount lower than mine. My buddy just installed a whipple on his '16 Silverado 5.3. His does not rattle either. I'm betting you will be good to go with a slight idle rpm bump.
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Baby Blue
2016 Hyper Blue 2SS/6m/MRC/NPP/Silver Rally stripes/ZL1 wheels & brakes/GForce DS and axles/ZLE Cradle Bushings/FE4 ARB front & rear/SEMA Grill/Rotofab dry/95mm TB/Magnuson 2300/Full LT4 fuel system/JMS boost-a-pump/E85 Sensor/Ported CID heads from LME/Cammotion PD cam/Thompson Motorsports forged shortblock/catted Kooks 1 7/8 headers /JRE remote tuned
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