Colby Posted April 4, 2008 Report Posted April 4, 2008 Am either looking into building a 385 or 421 cub. Looking into out-of-frame drag pipes. Would big bore or small bore be a better choice? What mods are required for the out-of-frame? Thanks in advance. Quote
dajogejr Posted April 10, 2008 Report Posted April 10, 2008 ASK WHOMEVER is building your motor... There is a HUGE debate on which pipe is best for which application. It used to be 4mil or smaller, small bore, larger than 4...big bore. That's not the case. Some stock stroke and 4 mils run very well with big bore, some 10 mils run great with small bore. So...go on the advice of your builder. No mods necessary, you'll just have to figure out how to hang the pipes from your footpeg(s). I use a stock front pipe hanger, and you want a rubber mount, NOT solid. They need to flex. Quote
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