Horse power drop using early A 273 manifolds
It may not be the 273 rear firing manifolds killing it, but the F'd Y-pipe they used off of them, that kinked 90 was nasty! Then you had this..and that. Although it worked pretty good for a 273. Pics courtesy of @cosgig
.
It may not be the 273 rear firing manifolds killing it, but the F'd Y-pipe they used off of them, that kinked 90 was nasty! Then you had this..and that. Although it worked pretty good for a 273. Pics courtesy of @cosgig
.