The proper question would be how heavy is the car. LOL
Race weight is generally 4050 pounds depending upon fuel level.
But in full disclosure, the 13.4 was with a negative density altitude. I generally run 13.6-13.8 depending upon the track and weather.
The remainder of the exhaust is basically wide open. I'm running Hooker's mufflers that are open straight through. The only restriction would be reversion at the cutout Y pipes when the cutouts are closed.
One of my dreams is to rig a WOT switch and timer to hold the cutouts closed for a time yet to be determined before opening the cutouts at higher rpms. I believe it would be possible to utilize more torque at the launch then less restriction to HP once the cutouts open at the higher rpms.
...I went 12.98 @ 103 with 254rwhp and at 3700lbs.
So I'm posting here because, well, most of the recommended headers you guys have listed here for 5.0 Birds are obsolete or no longer produced. I'm halfway through gathering parts for my GT40 build and the only roadblock I'm hitting is this.
Now that I got the correct cat forward exhaust assembly for the car, I have some options on the cat back exhaust. I have the option to replace the cat back exhaust and mufflers. The rear tube of the assembly below is just a reducer and has no muffler capabilities. As I learned with the two...
i just had my t bird dropped off at my house...looks nice just needs to be washed and waxed.
i was wondering..if i cut off the mufflers out back how much pipe or how long of a tip would i need to fit in place of them and what is the diameter of the stock pipes?
A forum community dedicated to Ford Thunderbird, Mercury Cougar and Lincoln Mark owners and enthusiasts. Come join the discussion about performance, modifications, troubleshooting, maintenance, and more!