Yes, but I have "cheated" a bit on the exhaust manifold. (see note below)
No. Factory electronic
I call the device below an oversized manifold. Though it does not look much larger than the factory manifold, the difference in wall thickness is considerable. Note: It does not have a choke coil pocket or exhaust damper. Compared to the stock manifold, it has more surface area making it run a little cooler, though it barely showed up on the temp gauge on long trips. I couldn't see any difference around town. Manifold heat is provided by heat soak from the cylinder head. It did not affect the time it takes to get heat inside. In terms of fuel mileage, I saw no difference in city usage and 2-3 mpg increase on longer trips.
