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The perfect Pipe for a 421 68mm bore, +4mm stroke. ?


EvilBanshee

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in the past i have ran BB's on 421's i have done they have a tad more low end and some builds i like that,,

 

the BB pipes i had on my 535 were as i understood it at the time the 3rd production set built in the BB set up.. i order'd them YEARS ago.. after talking to shear at the dunes he said he's improved the design a lil more and then went to stamping them.

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