I apologize if my post offended anyone , but 3 times a week someone has this same problem . As far as purist goes ,I'm pretty far from it , Sam James Cowl , Plenum ,10-1 pistons , 17 row oil cooler ,4:1 exhaust ,Bendix Mags 25*
Now some more info on yours , how did you match your plenum to the cowl (photos) . I had an issue with mine . Exhaust ? How many pipes out the cowl ? Prop to cowl seal ?
N 666 TA
First Flight 2-3-2015 🚀
2017 donation paid