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Anyone know the difference in additional HP using the stock header with the slip on GYT-R muffler vs the complete system?. Is the stock header any different than the GYT-R accesory pipe???
 

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i was told that there isn't much difference in the header & stock headpipe. but i'm not sure.

andy
 

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With a stock motor the head pipe will add about 1.5-2 HP. You really start to know the difference once you start adding more eng. performance parts (Cam mod / Piston / Ign/ etc..)
The GYT-R head pipe is larger in diameter then stock.
 
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