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Rob - Here's a quote from Supersprint's website:
"The factory one-piece muffler system has a complex design, which includes a built in flapper valve on one side of the system that has the sole purpose to alter the sound note at certain pre-set rpm levels. This design reduces performance at low RPM. Supersprint rear mufflers alone increase the torque and max hp by a significant amount, especially at low rpm. The results are a mature aggressive sound free of droning, even at low rpm and high loads. "
I would appreciate your thoughts on this statement. Do you feel better low end performance? Any drone? Thanks!
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Current: 2022 Donnington Grey M5 Competition, 2014 Anvil WW Jeep Wrangler
Previous: 2019 Donnington Grey M5 Competition, 2016 Silverstone M5 CP, 2013 Monte Carlo Blue M5 CP (ED on 9/1/12), 2009 Carbon Black M5, 2006 Silverstone M5, 2003 Sterling Grey M5, 2000 Anthracite 540i6, 1998 Jeep Grand Cherokee 5.9Ltd, 1990 Eagle Talon TSi AWD, 1978 Mazda RX-7
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