I hesitated with PURE SPORT Megaphone Full Exhaust System of Mr. SP Tadao who had a good reputation of the performance, but I chose GP-PERFORMANCE XL Full Titanium of Mr. OVER who had a limited time Point with early delivery.
Performance The low speed range is the same as the OEM Exhaust System, and there was no difficulty in driving at all. The OVER is more powerful in the mid range, and the car speed extends well when pulling in 2nd and 3rd gear. The maximum speed is 5~6km faster than Normal muffler, and even Normal muffler has 3 digit limit if it's not too much headwind on flat road. The weight of the OVER is less than half that of the NORMAL, so cutting back and forth feels even lighter.
[Design] The Megaphone Type is very powerful and the parenthesis is very nice. Personally, I think it is a design that matches Grom very well.
[Volume and sound quality] I had heard that it was quiet compared with other external exhaust systems, but it is a sound with a sense of existence. The volume is bothering when Idling is high right after applying the Engine, but after Idling settles down, it becomes a quiet volume of the same as NORMAL, etc. While driving, the high-pitched sound of the Axel on is very pleasant. I think the exhaust sound is just right for appealing a small motorcycle on the street surrounded by cars, although you have to be a little careful about the rpm at night in a residential area.
【attachment】 It is very easy to install because the weight is light and there are few places to fasten the Screw. However, the flange nut interfered with the exhaust pipe when I put the exhaust pipe on the Stud bolt of Cylinder and it was difficult to fasten the nut. I saw the same exhaust system installation video on youtube, and it looks like there is some individual difference in the thickness of the exhaust pipe on the cylinder side (aperture position, etc.).View Detail
It was easy to install, and if you just prepared the Gasket for a few hundred dollars, it was removed and pontooned on.
Of all the exhaust systems out there, the OVER exhaust system sounds great! There is a loud sound, but not this one. My personal impression is that it's an elegant deep bass sound. At first, the sound was more powerful than what I heard in the video, and I was Big Li.
As far as performance goes, I feel like I'm better off compared to the OEM! As a layman, I didn't understand the Level the second time I rode it, but …
It's a bit expensive, but I'm glad I didn't compromise with another exhaust system and wore the OVER I like! It definitely makes driving fun.View Detail
After careful consideration of the sound quality, we settled on this exhaust system The price is high for the titanium, but the bass and pulse are satisfactory It's hard to say that the horsepower has gone up, but the bottom is a little thinner, but the dandruff is so much better It's been funView Detail
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