1999 gt exhaust

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03-25-2009, 06:54 AM

steve r

2nd Gear Member

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Join Date: Oct 2007

Location: longisland, new york

Posts: 297

1999 gt exhaust

For now I just want to change out my mufflers on my bone stock 99 gt..Im looking at standard 40 series flowmasters and I was wonder what size do I need. Are these the ones that I need? http://www.jegs.com/webapp/wcs/store...-1&showValue=1

03-25-2009, 09:12 AM

isjoining

3rd Gear Member

Join Date: Mar 2007

Location: NY

Posts: 604

stock catback piping is 2.25" but you can weld on a 2.5" inlet/outlet muffler using a pipe reducer.

03-25-2009, 10:02 AM

98MustangGT46

5th Gear Member

Join Date: May 2007

Location: Norton, Massachusetts

Posts: 2,166

^^ Ecxactly and you want offset/offset

03-25-2009, 10:05 AM

steve r

2nd Gear Member

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Join Date: Oct 2007

Location: longisland, new york

Posts: 297

thank you^ so I will order 2.25..I wasnt sure if it was 2.5 or 2.25

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