boss exhaust.wmv

1970 BOSS 302 stroked to 347 hooker super comps, 2 1/2 Dr gas x-pipe, spintech prostreet mufflers

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1970 Mustang BOSS 302 On the Dyno
This 1970 BOSS 302 came out of a barn recently and made 257 RWHP. The AF ratio was way off as can be seen by all the black smoke. The 257 HP number was made after some tuning. I think it made something like 230 HP in the video. A 2013 BOSS 302 was Dynoed at 380 RWHP and 347 TQ the same day.