[bingo2]

I'm considering EFI for my for my car.

The exhaust system in a 4 piece affair; primary header, collector, muffler and turn down. The collector is bolted to the primary, the muffler is a slide fit over the collector and the turn down slides over the muffler end.

The ideal placement for the O2 sensor would be near the end of the collector however, there isn't enough room between the collector and the body panel to mount the bung and sensor at the preferred angle of 10-15 degrees up from horizontal.

I'm curious to know where anyone has mounted the sensor and at what angle.