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I got my first Neptune built for my R1150R about 3 years ago. It was the first pipe Mark had ever done for a BMW. I was rapt. (for some reason not many people put aftermarket pipes on their BMW's - BM owners generally tend to be fairly "staid" people.)
I currently have Neptunes on both my Ducatis, and Hamish has one on his Suzuki GS1200SS.
Once the Neptunes were fitted, I had my bikes dynoed and the HP figures went like this:
M800: increased from 73 to 84
M1000: increased from 85 to 94
Main reason for the big increase in HP is that the standard mufflers have catalytic converters, and the Neptunes let the bikes breath freely.
Basically the engine management system did whatever it needed to do to change the air/fuel mixture.
I like the way you can choose the finish of the mufflers. I chose shiny black and a double outlet for my BMW. Both my Ducatis have brushed stainless with single outlet. Hamish's Suzuki has shiny black with single outlet.
Noise: wonderful. Absolutely wonderful.
Mark could have made high pipes for my Ducs, but I chose the standard style as that lets me carry my throwovers on both my bikes.
Like everyone else has said, Mark is a top bloke and does a great job. I would have him make mufflers for my next bike like a shot - in fact I would not even think of having any other sort of muffler.
Note that Mark makes mufflers for Bruce Telford, who races an RSVR. He has made pipes for at least two of Bruce's racing Aprilias, if not three. So he is very experienced with Aprilia mufflers!!
Feel free to pm me with your email address if you'd like me to send you a photo - I'm not technological enough to put a photo on the website!!
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Being frustrated is disagreeable.
But the real disasters in life begin when you get what you want.
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