SLP LoudMouth for 2014-2015 GM Trucks Produces Dyno-Proven Gains


A couple of weeks ago, we told you a little bit about SLP’s Power Pack Systems for 2014 and 2015 GM trucks powered by fifth-generation 5.3L and 6.2L engines.

This week, we put our stainless steel LoudMouth to the test on our in-house chassis dyno to bring you horsepower and torque numbers.

silverado Exh

After swapping out the stock exhaust for our LoudMouth system, we saw gains of just over 12 horsepower and 9 lb-ft of torque, giving us a final horsepower rating of 298.58 and 323.26 lb-ft of torque.

While the stainless steel LoudMouth exhaust tone is notably bold and aggressive to the competition, passengers won’t be bothered by a loud or overbearing interior drone.

SLP’s LoudMouth exhaust for 2014-2015 GM Trucks will be available this year.

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