Once you take the heat shield off it's pretty easy, just 2 nuts. (Mine doesn't have a heat shield, so I don't know whether or not it's hard to get off

)
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-Ted
-1986 Mazda RX7 Sport [DD/beater]: engine finally let go at 205k. parts car status.
-1986 Mazda RX7 base [resto-mod project]: S5 n/a swap in progress.