#02: In Martin's words. "With my old cowling, during routine 100+ degree summer days in Northern California, I often observed 400+ CHTs on my JPI700 in normal cruise (normally 2600 RPM@8000'). With the Jaguar Cowling, I'm able to keep the CHTs around 380 in cruise. In terms of speed, I'm seeing around 143-144 TAS at 10K feet. That's 5-6 knots faster than with the production cowling."  PS, That's my wife wrenching on the new cowling. She helps a lot around the hangar.