Performance Gains from Longtubes?

[1999GTCONV]

Hello, I am thinking about buying a set of the new ceramic coated MAC longtubes for my automatic gt. My question to you all is from your experiences are longtubes on the automatic worth it? What kind of realistic gains should i expect with a good tune? Just curious, but Do longtubes increase gas mileage or cause more gas to be burnt? Thanks in advance for any help.

 

[Dark Knight GT]

What kind of mid-pipe are you planning on using ? Are you going to buy one custom made for long tube headers or will you have your Bassani X cut and welded to fit with the long tubes ?

Long tube headers usually add 12-15rwhp theirselves to most 99-04GT's. You may or may not loose gas mileage with them. I didn't loose or gain any with mine. You may experience some loss in low end torque but thats normal with any high flow exhuast setup. A good tune should help to correct that though. How much power a dyno tune will add, I'm not sure.

 

[mcmmotorsports]

In a recent issue of MM&FF I think they gained like 40 hp with nothing but L/T Headers
Log style factory manifolds are so friggin restrictive.

 

[Dark Knight GT]

I wouldn't be quick to believe what you read in a magazine. What kind of a vehicle was this on ? If it was supercharged, then yeah, I'de say 40rwhp is achieveable with LT's and a tune.

 

[mcmmotorsports]

June 2004 issue, pages 100-108.

 

[mogs01gt]

There have been tons of threads on this. Do search.
They are worth it, that is all you need to know.

 

[01mgvert]

Hello, I am thinking about buying a set of the new ceramic coated MAC longtubes for my automatic gt. My question to you all is from your experiences are longtubes on the automatic worth it? What kind of realistic gains should i expect with a good tune? Just curious, but Do longtubes increase gas mileage or cause more gas to be burnt? Thanks in advance for any help.

I will be picking up my car later today with newly installed Hooker LT headers and o/r x-pipe. The shop is also going to dyno my car before and after the installation. I will be sure to post the results.

 

[MustangLife]

01mgvert wrote

I will be picking up my car later today with newly installed Hooker LT headers and o/r x-pipe. The shop is also going to dyno my car before and after the installation. I will be sure to post the results.

Bump

 

[mrvax]

In a recent issue of MM&FF I think they gained like 40 hp with nothing but L/T Headers
Log style factory manifolds are so friggin restrictive.

Not a chance in hell this will happen with an N/A car.

 

[mrvax]

I will be picking up my car later today with newly installed Hooker LT headers and o/r x-pipe. The shop is also going to dyno my car before and after the installation. I will be sure to post the results.

I'd guess about 22rwhp over stock with both. Please post a new thread. All of us can use the dyno results.