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Dirt Bike Brands - Other
PRO CIRCUIT T4 EXHAUST
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[QUOTE="JohnnyMac, post: 18231, member: 18888"] I have the T4 on my 520SX. It lets the bike rev faster. It feels quite a bit more open. At first I didn't care for it over stock but after riding with it a month or so I'm reconsidering. The cap that came with it has a 2" open. I just got the 1-1/2" end cap but will have to wait till Sunday to try it out. The stock opening looks to be about an 1-1/4 to an 1-1/2. I'm guessing that the smaller (torque) endcap might make it really work nice. I'll post back after Sunday. Also, I didn't have to adjust the jetting. [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
PRO CIRCUIT T4 EXHAUST
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