leaky exhaust

if its leaking alot of pressure by it will help to seal it, if its just a bunch of spooge I doubt you will notice any increases in power,

work on your jetting and you can decrease the amount of spooge, cause if its not leaking out there it will find the next place u[ the pipe to leak from and build up in thelower parts of the pipe.. getting it to run cleaner will get you noticible increases in power
 
with the kinda crappy design of the fatty flange getting it to seal perfectly probally isnt possible but like yb said some high temp rtv will help a bunch.
 
well i fixed the problem i welded the pipe to the flange :) not leaky any more oh and by the way it was the exhaust air not oil leak fyi thanks for help