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  1. M

    Tick/rattle at 1700 rpm and up.

    I have been a member of the forum for a while. I browse occasionally, but haven't really ever posted. I have a 2003 Mach 1 5sp that has been babied most of it's life. It is one owner and it has 59000 miles. 5-20 synthetic every 5000 miles. The other day I started to get a ticking/rattle...
  2. M

    WTB: Ford racing dual-mode mufflers

    Several years back ford made an FR500 exhaust kit for IRS Cobras with pressure-sensitive valves. They also sold those mufflers separately in the catalog as m-5230-bp2. They have long been discontinued. Anyone have a lead on these?

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