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RPM 2.5" Sport Muffler

AVI8OR

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Jan 5, 2025
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La Pine Oregon
Has anyone here installed this muffler or the whole system to include the header they offer? Thoughts, actual performance increase. RPM claims at least 3 hp with the muffler alone.

 
These were previously brought up on this forum if you want to search the name. There was a few interested but never heard a report of one in use. Quite is a big part of the reason I purchased the 1500 so it's not an item for me.
 
These were previously brought up on this forum if you want to search the name. There was a few interested but never heard a report of one in use. Quite is a big part of the reason I purchased the 1500 so it's not an item for me.
There are plenty of people here that want even less noise, not more noise. There has not been much talk here about aftermarket exhaust but I'm sure if someone pulls the trigger on one, we'll be happy to hear how it turns out.
 
Sounds good, thanks. I'll see what I can come up with. A bit skeptical on a 3 hp increase with just the muffler alone. They appear to be louder that's for sure.
 
Sounds good, thanks. I'll see what I can come up with. A bit skeptical on a 3 hp increase with just the muffler alone. They appear to be louder that's for sure.
I could see them doing a 3hp increase. Better exhaust flow is always helpful. I just don’t think it’s enough to feel it. Just turning on the A/C on a Northstar is around a 4-6hp drop. If you’re looking for a performance boost I’d recommend the Gilomen ECU/TCM tune. It alone is a significant performance improvement, and you could pair it with the RPM exhaust to maximize the increase.
 
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