J58 (SR-71) Engine

Strategic Air & Space displays a J58 jet engine, presumably one removed from their SR-71 Blackbird.

The J58 engine was also used by the A-12 and YF-12A.

For additional information on the J58, also known as the JT11D-20, see the "Engine & Afterburner" section of the SR-71 Flight Manual. In particular, there's an engine manual on page 1-6.