- Jul 2, 2004
How much hp do catalytic converters rob??
Steve777 said:stock 6 cat H-pipes suck, but if you have an X or H with 2 hi-flow cats, there isnt much difference at all ....slightly quieter and slightly more restrictive, but not by far - maybe a few horses ...hiflow cats are built good. So if you live in a place that requires emission, just get 2 hi flows and you wont be sacraficing much and still pass the test
NewStangNewbee said:thanks hey do you know what increase there is if i put 3.73's in over the stock 2.73's in the quarter mile?
NewStangNewbee said:but if you get better torque in every gear how cant it shave a second or more off?
NewStangNewbee said:do u know of a quarter mile calculator that figures in rear end to because i dont understand how they can calculate your quarter mile without it some how they do though
NewStangNewbee said:yeah i am sort of weighing through what i should do next. I know i am taking of the catalytics so i think i will put headers on and while i am doing that i might do a head swap. I want to do it all at the same time so it is easier.