Aluminum twin-bore intake flange caked with black carbon sludge

Close-up of a bare aluminum intake or throttle-body mounting flange with two large round bores, both coated in thick black oily carbon sludge, and a threaded bolt hole at upper right. A scraper blade rests at the lower right and a black corrugated loom sits at the edge; red date stamp reads 2007 1 11.

AI caption January 2007 · Photo 506 of 1257