Very nice choice in rides. I myself own a 1997 Mustang GT supercharged with a Vortech V1 supercharger producing about 12lbs. Of boost at 5500 RPM's. I have owned the car since I got it, straight cash deal, and I live in a county in California that doesn't require annual or bi-annual smog checks, only when the vehicle is sold or purchased, so I have completely gutted my catalytic converters, all 6 of them, and am running straight pipes. Although, I am thinking of getting a pair of high flow catalytic converters, mainly for the people behind me in the drive through line. ;)). High flow catalytic converters will definitely let your vehicle pass smog, and although there is a lot of talk about engines, like our 4.6L's, needing back pressure; I don't buy it. Let's face it, an engine is really nothing more than an air pump. Yes, it does take gasoline to make them run, but they do not run on gasoline. This is an important concept that most people don't comprehend. The optimum air:fuel ratio is 14.7 parts air to 1 part fuel, so there is much more air needed then fuel. To make horsepower it's as simple as air in and air out. Back pressure can, by it's nature, only be resistant to that. Anything that American Muscle sells, take it to the bank. Is the highest quality aftermarket part for your Mustang available today. Period. Do not have a second thought about the quality or the effectiveness of the part. Now as far as your hiccup, I don't think that it is back pressure related, because if it was a mechanical related it wouldn't just happen in first gear, it would happen whenever the engine RPM's got to where the hiccup was occurring, regardless of gear. What exactly is your vehicle doing in first gear? Also, is your vehicle's Malfunction Indicator Lamp [MIL], or "check engine" lamp illuminated?
Tuesday, April 13th, 2021 AT 10:39 AM