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Hi there,


I have just fitted an Arrow Thunder carbon exhaust with the original straight through baffle and had a custom map to suit my bike on my local dyno.
I only had the bike delivered back to me late on Friday so I have not had had chance to ride it yet but I was surprised to find out that I had only gained 3.5hp at the rear wheel and 4ft of torque.
This was against the original exhaust but with an Arrow mid pipe fitted.
I have also noticed that on the dyno graph that was printed out there is a slight "dip" around 3,000rpm then it carries on a nice smooth climb, where with the original exhaust with the Arrow mid pipe there is no dip at all.
Why do I get a "dip" when the Arrow Thunder exhaust is less restrictive ?
I look forward to your reply's


Regards
brutale jockey
 

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The backpressure is gone.
 
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