Quote:
Originally Posted by Formulajones
Dennis is right on the money. I also run the Pypes transverse setup on my bird. When I switched from the stock Walker system that was 2 1/4" and upgraded to the mandrel 2 1/2" system my car picked up a solid 3 tenths and a little more than ~3 mph with no other changes at all.
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And Jones, if you would have had the day one original corked up '70-72 stock muffler system, what do you think the car would have picked up? .5, .6?
Have been buying Walker Dynomax mufflers for 20 years, all of them have been noted for higher flow than stock, that's why have bought them.