FREQUENTLY ASKED QUESTIONS 

Most questions such as hose sizes and jetting can be simply answered by going directly to the exhaust system in question and clicking on "Installation Instructions". Older systems that are not currently manufactured by Coffman's will not have information on this site. For this we suggest to contact us direct. For more detailed questions such as a particular exhaust system combined with various components (i.e. carbs, reeds, heads, etc.) have many variables and cannot be answered simply by this process. What we suggest is to either phone us direct or e-mail us with your question(s). We will be happy to help guide you in the right direction. It is always important to realize for jetting inparticular, that nothing is set in stone. Different components working together, altitude, temperature and humidity all play a roll in getting the correct combination. All responses from Coffman's are to be used as a guideline only and will not be held responsible thereof. 

Coffmans Exhaust
181 wabash ave
ukiah Ca 95482