Dynamic dB level test on Alfa Romeo 4C, equipped wtih GMS 3" Modular exhaust system (200 CPSI cat + GMS valved silencer) + GMS Stage I ECU (hard cut, pops and bangs, 7250rpm max) + GMC carbon CAI.
Not absolutely trustworthy comparison as the GoPro automatically tunes and evens the audio levels, but should give a basic insight on sound levels and characteristic differences between open and closed exhaust valve on the GMS 3" Modular exhaust - valved silencer.
With closed exhaust valve, there is significantly less noise from pops and bangs and hard cut limiter. Mostly you can hear turbo compressed air rushing through the exhaust. With open exhaust valve, both rev limiter and pops and bangs are significantly louder. Due to unrestricted exhaust flow, the turbo air rushing is now gone and engine note is far more exposed.
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GMS parts:
GMS Big brake kit 330/320
GMS SLT forged wheels 17x7.5 and 18x9.0
GMS Titanium SL wheel studs
GMS Performance rear arms - race
GMS Performance front arms
GMS Adjustable hollowed ARB
GMS Camber and caster plates
GMS Camber and caster shims
GMS 3'' Modular exhaust T304 (200 CPSI cat + valved rear silencer)
GMS Stage I ECU (hard cut, 7250 rpm max, pops and bangs)
GMS Stage I TCT
GMS Oil catch can system
GMS Carbon rear hood w/ GMS carbon race wing
GMS Carbon side scoop
GMS Carbon rear louver
GMS Carbon timing belt cover
GMS Engine mount - race
GMS Alu front bumper mesh
GMS Alu front hood mesh
GMS Alu rear bumper mesh
GMS FireX mount w/ floor mats
GMS Prototype projects (undisclosed)
Nitron NTR R3 coilovers
GMS services:
GMS Alignment specs
GMS Damping adjustment
GMS Corner balancing
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8 сен 2024
