Quote: Hey Scott, can you post the sheet...and what happened to the "15 to 20 hp" ??? You could easily loose or gain 5hp with the choice of muffler you run and on a real 340 CI motor the gains would probally be less than 5hp. I remember when Dulcich dynoed a 440 and gained 2-3 ftlb of tq with the extrude honed BB set...not really worth the effort and expence AND I hear that some exhause manifolds will crack over time. I would like to have seen that 426 run with a nice set of TTI headers as well as the manifolds.
Extrude Hone CLAIMED 15-20 , Scott was alot closer with his 5-10 guess
Why am I not surprised to see the unrealistic claims from someone taking your hard earned cash?
