We don't have synonyms for extractors yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are extracts, extractor and detractors.
(n) :
(automotive) A set of pipes fitted to the exhaust ports of an automotive engine, designed to increase its power output (essentially by altering gas pressures to get more fuel through it). https://web.archive.org/web/20060820191056/http://moonahmufflers.com.au/extractors/index.html
(n) :
(automotive) A set of pipes fitted to the exhaust ports of an automotive engine, designed to increase its power output (essentially by altering gas pressures to get more fuel through it). https://web.archive.org/web/20060820191056/http://moonahmufflers.com.au/extractors/index.html