mpd579 Posted November 18, 2012 Report Posted November 18, 2012 Big difference between them? Going on a 421 cub I think I need the small bore. & what about the poor man CPI on their site I don't give a shit about chrome I like black Just fine & need to save a $ if I can. Quote
Nightmare Posted November 18, 2012 Report Posted November 18, 2012 Some guys can run bb on 4 mils cause their setup for them. I think the only difference between them is the poor man version has 2in dia silencers compared to 21/2 on the other version. Sent from my SGH-T679 using Tapatalk 2 Quote
coryv4 Posted November 18, 2012 Report Posted November 18, 2012 Big difference between them? Going on a 421 cub I think I need the small bore. & what about the poor man CPI on their site I don't give a shit about chrome I like black Just fine & need to save a $ if I can. sb would be fine. but from what ive "HEARD" 421s need bb if they have more extreme port timing because cpis dont flow enough and trap alot of heat on the higher hp motors Quote
special06shee Posted November 18, 2012 Report Posted November 18, 2012 Josh.. Just get the small bores! That is what Cameron told me to run with those cylinders!! It was a screamer! Quote
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