Besides venting engine exhaust, an exhaust system must heat the cabin and warm the carb. Some crucial rules must be heeded, no matter what kind of system you choose.
MGL Avionics/Stratomaster has cut a nice swath through the EFIS and discrete-electronic-instrument world. The company’s ALT-1, from its Infinity Singles line, makes a good, low-cost backup altimeter with a surprising list of features. By Marc Cook.