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Message: [QUOTE="footlong70, post: 1145809, member: 8456"] Flowmaster has their "pro-series" mufflers which is what use to be known as their "hushpower" line. They are meant for higher hp diesels without the all the noise. At least that's how they advertise them. They are available from 3"in/out to 5"in/out. I bought a 4" a few years ago when I first deleted. Excessive noise and hairdryer sound is very minimal even with stacks right by your head. Yet a very nice, firm, diesel rumble/whistle throughout the rpm range. I like it. [/QUOTE]

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