To get the most out of 180's they should exit straight out of the car as close together as possible for that F-1 sound ( V-8 chain saw ), I know theirs a thread for a forum member who was making them about 2 or 3 months ago and his were right on. Another concern is, can you get at the plugs and removing the valve covers. The quality
function of the primary's to the collectors, size,length and the rotation of the exhaust pulse are critical. See mine on page #2
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