Reply to thread

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

Message: <blockquote data-quote="Doug Kaye" data-source="post: 1045768" data-attributes="member: 73761">my son bought a Subaru WRX which had a K&N air filter. After researching I replaced it with stock filter. The K&N may get a marginal increase in power, at the cost of potential contamination of the air inflow.. not worth it I think.Replaced plugs and wires at 100k with NGK Iridium IX and Denso wires, improved idling and running, still going well at 155k. Average 19-20mpg in summer, 16-17 winter, and can get 21-22mpg at 65mph freeway when not hauling canoes around. My reasoning is, the price difference between NGK and cheaper plugs isn't much, adds up to under $30, for a job I'll only need to do every 100k with good plugs. As painful as it is to replace these plugs, I'm willing to pay a few dollars more to make sure I won't have to do that job too often..</blockquote>