In a message dated 7/9/03 9:07:42 PM Pacific Daylight Time, m.pollock@verizon.net writes: << We chose the longer 8" extension and we have never burned a prop. We do have a little soot, but no burns in 620 hours with an IO-360 with 3-blade Performance propeller. >> Same set-up with 600hrs, no burns, a little soot. TEC