Noob Needs some help (Exhaust)

[02GTLR]

OK I am going to get a MaC offroad H pipe for my 02 Gt.
This is the Pipe I was looking at. MAC Offroad H 2.5 inch.
Right now I am stock except for Flowmaster 40 Delta flows that are 2.25 inches. I guess I need to know if I can use the 2 and a half inch H pipe with 2.25 mufflers. Also kinda want to make sure this pipe will fit the car before I buy it. It is an 02 Gt automatic stock headers and all that except for the 2.25 inch delta flows.

Also are the MIL Eliminators the only thing I need to keep my Engine light from coming on?

 

[BAFMustangGT]

It will fit, but persoanly, i would look at a Dr. Gas or Magnaflow. Magnaflow is all SS and Dr. Gas is prolly one of the best out there. MAC is good, but i would go with Dr. Gas. Then i would sell the mufflers and go to Magnaflow and get an SS kit because Magnaflow flows better than the Flowmaster. Then again, if you like the sound, i guess you could keep it. But for peformance thats what i would do.

http://www.need-4-speed.com/dr.gas.htm

 

[Aaron 4.6]

Yes. The exhaust needs a set of flow tubes. They are basically adapters that go from one size to another. I have a 2.5" Dr. Gas X-pipe feeding the stock 2.25" exhaust on my car.

 

[jrc_03_gt]

I have original series flowmaster mufflers and a off road mac h pipe. It sounds awesome! The 410's made it louder too!

 

[03gtmustang]

Id go with the packs and a prochamber