I bought the GTM resonated TP's and i have the HKS centre pipe with stock muffler but the Rasp is ridiculous with the stock muffler!!
Do u thin ig i change the rear muffler it will help with the rasp???
Im putting stock cats back tomorrow though i cant take the sound....
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09 7AT Touring 370z, Pearl White, Evo-R Carbon Fang Cover, Carbon Top Cover, HKS Centre Pipe, Illuminated Kickplates, Custom Sprayed stock RAYS 
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