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Discussion Starter · #1 ·
Just lettin you guys know, but i picked up a p-4 insert for my two bros pipe on the k7 600 and i definatley recomend it.

It gave it a lot more mid range torque but the top end did flatten out a little bit. But the sound is a lot nicer, its still real load but just gave it a cleaner sound, so it just doesnt sound like a straight pipe.

it was like 35 shipped to my doors straight from twobros
 
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