I've been running an FMF fatty w/power core silencer for the past 2 years that I've had my 85 and last weekend I acquired a barely used hand coned pipe w/silencer built for a 310. My engine is just an 67.5 oem cylinder w/thin head gasket running 110 and unknown porting. This pipe totally woke up my engine and it pulls much harder and just more power everywhere almost can't believe how much it changed. I have a 35mm PWK w/boyesen reeds on stock cage. I ordered a 38mm PWK AS and v-force 3 reeds so do you think the carb and reed cage will be a good addition or should I leave it as is?